!!!!!!! DO NOT EDIT THIS FILE !!!!!!!

This file is built by metaconfig.

This file contains a description of all the shell variables whose value is

determined by the Configure script. Variables intended for use in C

programs (e.g. I_UNISTD) are already described in config_h.SH. [`configpm'

generates pod documentation for Config.pm from this file--please try to keep

the formatting regular.]

_a (Unix.U):

This variable defines the extension used for ordinary library files.

For unix, it is '.a'. The '.' is included. Other possible

values include '.lib'.

_exe (Unix.U):

This variable defines the extension used for executable files.

DJGPP, Cygwin and OS/2 use '.exe'. Stratus VOS uses '.pm'.

On operating systems which do not require a specific extension

for executable files, this variable is empty.

_o (Unix.U):

This variable defines the extension used for object files.

For unix, it is '.o'. The '.' is included. Other possible

values include '.obj'.

afs (afs.U):

This variable is set to 'true' if AFS (Andrew File System) is used

on the system, 'false' otherwise. It is possible to override this

with a hint value or command line option, but you'd better know

what you are doing.

afsroot (afs.U):

This variable is by default set to '/afs'. In the unlikely case

this is not the correct root, it is possible to override this with

a hint value or command line option. This will be used in subsequent

tests for AFSness in the Perl configure and test process.

alignbytes (alignbytes.U):

This variable holds the number of bytes required to align a

double-- or a long double when applicable. Usual values are

2, 4 and 8. The default is eight, for safety.

ansi2knr (ansi2knr.U):

This variable is set if the user needs to run ansi2knr.

Currently, this is not supported, so we just abort.

aphostname (d_gethname.U):

This variable contains the command which can be used to compute the

host name. The command is fully qualified by its absolute path, to make

it safe when used by a process with super-user privileges.

api_revision (patchlevel.U):

The three variables, api_revision, api_version, and

api_subversion, specify the version of the oldest perl binary

compatible with the present perl. In a full version string

such as '5.6.1', api_revision is the '5'.

Prior to 5.5.640, the format was a floating point number,

like 5.00563.

perl.c:incpush() and lib/lib.pm will automatically search in

$sitelib/.. for older directories back to the limit specified

by these api_ variables. This is only useful if you have a

perl library directory tree structured like the default one.

See INSTALL for how this works. The versioned site_perl

directory was introduced in 5.005, so that is the lowest

possible value. The version list appropriate for the current

system is determined in inc_version_list.U.

XXX To do: Since compatibility can depend on compile time

options (such as bincompat, longlong, etc.) it should

(perhaps) be set by Configure, but currently it isn't.

Currently, we read a hard-wired value from patchlevel.h.

Perhaps what we ought to do is take the hard-wired value from

patchlevel.h but then modify it if the current Configure

options warrant. patchlevel.h then would use an #ifdef guard.

api_subversion (patchlevel.U):

The three variables, api_revision, api_version, and

api_subversion, specify the version of the oldest perl binary

compatible with the present perl. In a full version string

such as '5.6.1', api_subversion is the '1'. See api_revision for

full details.

api_version (patchlevel.U):

The three variables, api_revision, api_version, and

api_subversion, specify the version of the oldest perl binary

compatible with the present perl. In a full version string

such as '5.6.1', api_version is the '6'. See api_revision for

full details. As a special case, 5.5.0 is rendered in the

old-style as 5.005. (In the 5.005_0x maintenance series,

this was the only versioned directory in $sitelib.)

api_versionstring (patchlevel.U):

This variable combines api_revision, api_version, and

api_subversion in a format such as 5.6.1 (or 5_6_1) suitable

for use as a directory name. This is filesystem dependent.

ar (Loc.U):

This variable is used internally by Configure to determine the

full pathname (if any) of the ar program. After Configure runs,

the value is reset to a plain "ar" and is not useful.

archlib (archlib.U):

This variable holds the name of the directory in which the user wants

to put architecture-dependent public library files for $package.

It is most often a local directory such as /usr/local/lib.

Programs using this variable must be prepared to deal

with filename expansion.

archlibexp (archlib.U):

This variable is the same as the archlib variable, but is

filename expanded at configuration time, for convenient use.

archname64 (use64bits.U):

This variable is used for the 64-bitness part of $archname.

archname (archname.U):

This variable is a short name to characterize the current

architecture. It is used mainly to construct the default archlib.

archobjs (Unix.U):

This variable defines any additional objects that must be linked

in with the program on this architecture. On unix, it is usually

empty. It is typically used to include emulations of unix calls

or other facilities. For perl on OS/2, for example, this would

include os2/os2.obj.

asctime_r_proto (d_asctime_r.U):

This variable encodes the prototype of asctime_r.

It is zero if d_asctime_r is undef, and one of the

REENTRANT_PROTO_T_ABC macros of reentr.h if d_asctime_r

is defined.

awk (Loc.U):

This variable is used internally by Configure to determine the

full pathname (if any) of the awk program. After Configure runs,

the value is reset to a plain "awk" and is not useful.

baserev (baserev.U):

The base revision level of this package, from the .package file.

bash (Loc.U):

This variable is defined but not used by Configure.

The value is a plain '' and is not useful.

bin (bin.U):

This variable holds the name of the directory in which the user wants

to put publicly executable images for the package in question. It

is most often a local directory such as /usr/local/bin. Programs using

this variable must be prepared to deal with ~name substitution.

binexp (bin.U):

This is the same as the bin variable, but is filename expanded at

configuration time, for use in your makefiles.

bison (Loc.U):

This variable is used internally by Configure to determine the

full pathname (if any) of the bison program. After Configure runs,

the value is reset to a plain "bison" and is not useful.

byacc (Loc.U):

This variable is used internally by Configure to determine the

full pathname (if any) of the byacc program. After Configure runs,

the value is reset to a plain "byacc" and is not useful.

byteorder (byteorder.U):

This variable holds the byte order in a UV. In the following,

larger digits indicate more significance. The variable byteorder

is either 4321 on a big-endian machine, or 1234 on a little-endian,

or 87654321 on a Cray ... or 3412 with weird order !

c (n.U):

This variable contains the \c string if that is what causes the echo

command to suppress newline. Otherwise it is null. Correct usage is

$echo $n "prompt for a question: $c".

castflags (d_castneg.U):

This variable contains a flag that precise difficulties the

compiler has casting odd floating values to unsigned long:

0 = ok

1 = couldn't cast < 0

2 = couldn't cast >= 0x80000000

4 = couldn't cast in argument expression list

cat (Loc.U):

This variable is used internally by Configure to determine the

full pathname (if any) of the cat program. After Configure runs,

the value is reset to a plain "cat" and is not useful.

cc (cc.U):

This variable holds the name of a command to execute a C compiler which

can resolve multiple global references that happen to have the same

name. Usual values are 'cc' and 'gcc'.

Fervent ANSI compilers may be called 'c89'. AIX has xlc.

cccdlflags (dlsrc.U):

This variable contains any special flags that might need to be

passed with 'cc -c' to compile modules to be used to create a shared

library that will be used for dynamic loading. For hpux, this

should be +z. It is up to the makefile to use it.

ccdlflags (dlsrc.U):

This variable contains any special flags that might need to be

passed to cc to link with a shared library for dynamic loading.

It is up to the makefile to use it. For sunos 4.1, it should

be empty.

ccflags (ccflags.U):

This variable contains any additional C compiler flags desired by

the user. It is up to the Makefile to use this.

ccflags_uselargefiles (uselfs.U):

This variable contains the compiler flags needed by large file builds

and added to ccflags by hints files.

ccname (Checkcc.U):

This can set either by hints files or by Configure. If using

gcc, this is gcc, and if not, usually equal to cc, unimpressive, no?

Some platforms, however, make good use of this by storing the

flavor of the C compiler being used here. For example if using

the Sun WorkShop suite, ccname will be 'workshop'.

ccsymbols (Cppsym.U):

The variable contains the symbols defined by the C compiler alone.

The symbols defined by cpp or by cc when it calls cpp are not in

this list, see cppsymbols and cppccsymbols.

The list is a space-separated list of symbol=value tokens.

ccversion (Checkcc.U):

This can set either by hints files or by Configure. If using

a (non-gcc) vendor cc, this variable may contain a version for

the compiler.

cf_by (cf_who.U):

Login name of the person who ran the Configure script and answered the

questions. This is used to tag both config.sh and config_h.SH.

cf_email (cf_email.U):

Electronic mail address of the person who ran Configure. This can be

used by units that require the user's e-mail, like MailList.U.

cf_time (cf_who.U):

Holds the output of the "date" command when the configuration file was

produced. This is used to tag both config.sh and config_h.SH.

charsize (charsize.U):

This variable contains the value of the CHARSIZE symbol, which

indicates to the C program how many bytes there are in a character.

chgrp (Loc.U):

This variable is defined but not used by Configure.

The value is a plain '' and is not useful.

chmod (Loc.U):

This variable is used internally by Configure to determine the

full pathname (if any) of the chmod program. After Configure runs,

the value is reset to a plain "chmod" and is not useful.

chown (Loc.U):

This variable is defined but not used by Configure.

The value is a plain '' and is not useful.

clocktype (d_times.U):

This variable holds the type returned by times(). It can be long,

or clock_t on BSD sites (in which case <sys/types.h> should be

included).

comm (Loc.U):

This variable is used internally by Configure to determine the

full pathname (if any) of the comm program. After Configure runs,

the value is reset to a plain "comm" and is not useful.

compress (Loc.U):

This variable is defined but not used by Configure.

The value is a plain '' and is not useful.

contains (contains.U):

This variable holds the command to do a grep with a proper return

status. On most sane systems it is simply "grep". On insane systems

it is a grep followed by a cat followed by a test. This variable

is primarily for the use of other Configure units.

cp (Loc.U):

This variable is used internally by Configure to determine the

full pathname (if any) of the cp program. After Configure runs,

the value is reset to a plain "cp" and is not useful.

cpio (Loc.U):

This variable is defined but not used by Configure.

The value is a plain '' and is not useful.

cpp (Loc.U):

This variable is used internally by Configure to determine the

full pathname (if any) of the cpp program. After Configure runs,

the value is reset to a plain "cpp" and is not useful.

cpp_stuff (cpp_stuff.U):

This variable contains an identification of the concatenation mechanism

used by the C preprocessor.

cppccsymbols (Cppsym.U):

The variable contains the symbols defined by the C compiler

when it calls cpp. The symbols defined by the cc alone or cpp

alone are not in this list, see ccsymbols and cppsymbols.

The list is a space-separated list of symbol=value tokens.

cppflags (ccflags.U):

This variable holds the flags that will be passed to the C pre-

processor. It is up to the Makefile to use it.

cpplast (cppstdin.U):

This variable has the same functionality as cppminus, only it applies

to cpprun and not cppstdin.

cppminus (cppstdin.U):

This variable contains the second part of the string which will invoke

the C preprocessor on the standard input and produce to standard

output. This variable will have the value "-" if cppstdin needs

a minus to specify standard input, otherwise the value is "".

cpprun (cppstdin.U):

This variable contains the command which will invoke a C preprocessor

on standard input and put the output to stdout. It is guaranteed not

to be a wrapper and may be a null string if no preprocessor can be

made directly available. This preprocessor might be different from the

one used by the C compiler. Don't forget to append cpplast after the

preprocessor options.

cppstdin (cppstdin.U):

This variable contains the command which will invoke the C

preprocessor on standard input and put the output to stdout.

It is primarily used by other Configure units that ask about

preprocessor symbols.

cppsymbols (Cppsym.U):

The variable contains the symbols defined by the C preprocessor

alone. The symbols defined by cc or by cc when it calls cpp are

not in this list, see ccsymbols and cppccsymbols.

The list is a space-separated list of symbol=value tokens.

crypt_r_proto (d_crypt_r.U):

This variable encodes the prototype of crypt_r.

It is zero if d_crypt_r is undef, and one of the

REENTRANT_PROTO_T_ABC macros of reentr.h if d_crypt_r

is defined.

cryptlib (d_crypt.U):

This variable holds -lcrypt or the path to a libcrypt.a archive if

the crypt() function is not defined in the standard C library. It is

up to the Makefile to use this.

csh (Loc.U):

This variable is used internally by Configure to determine the

full pathname (if any) of the csh program. After Configure runs,

the value is reset to a plain "csh" and is not useful.

ctermid_r_proto (d_ctermid_r.U):

This variable encodes the prototype of ctermid_r.

It is zero if d_ctermid_r is undef, and one of the

REENTRANT_PROTO_T_ABC macros of reentr.h if d_ctermid_r

is defined.

ctime_r_proto (d_ctime_r.U):

This variable encodes the prototype of ctime_r.

It is zero if d_ctime_r is undef, and one of the

REENTRANT_PROTO_T_ABC macros of reentr.h if d_ctime_r

is defined.

d__fwalk (d__fwalk.U):

This variable conditionally defines HAS__FWALK if _fwalk() is

available to apply a function to all the file handles.

d_access (d_access.U):

This variable conditionally defines HAS_ACCESS if the access() system

call is available to check for access permissions using real IDs.

d_accessx (d_accessx.U):

This variable conditionally defines the HAS_ACCESSX symbol, which

indicates to the C program that the accessx() routine is available.

d_aintl (d_aintl.U):

This variable conditionally defines the HAS_AINTL symbol, which

indicates to the C program that the aintl() routine is available.

If copysignl is also present we can emulate modfl.

d_alarm (d_alarm.U):

This variable conditionally defines the HAS_ALARM symbol, which

indicates to the C program that the alarm() routine is available.

d_archlib (archlib.U):

This variable conditionally defines ARCHLIB to hold the pathname

of architecture-dependent library files for $package. If

$archlib is the same as $privlib, then this is set to undef.

d_asctime_r (d_asctime_r.U):

This variable conditionally defines the HAS_ASCTIME_R symbol,

which indicates to the C program that the asctime_r()

routine is available.

d_atolf (atolf.U):

This variable conditionally defines the HAS_ATOLF symbol, which

indicates to the C program that the atolf() routine is available.

d_atoll (atoll.U):

This variable conditionally defines the HAS_ATOLL symbol, which

indicates to the C program that the atoll() routine is available.

d_attribut (d_attribut.U):

This variable conditionally defines HASATTRIBUTE, which

indicates the C compiler can check for function attributes,

such as printf formats.

d_bcmp (d_bcmp.U):

This variable conditionally defines the HAS_BCMP symbol if

the bcmp() routine is available to compare strings.

d_bcopy (d_bcopy.U):

This variable conditionally defines the HAS_BCOPY symbol if

the bcopy() routine is available to copy strings.

d_bsd (Guess.U):

This symbol conditionally defines the symbol BSD when running on a

BSD system.

d_bsdgetpgrp (d_getpgrp.U):

This variable conditionally defines USE_BSD_GETPGRP if

getpgrp needs one arguments whereas USG one needs none.

d_bsdsetpgrp (d_setpgrp.U):

This variable conditionally defines USE_BSD_SETPGRP if

setpgrp needs two arguments whereas USG one needs none.

See also d_setpgid for a POSIX interface.

d_bzero (d_bzero.U):

This variable conditionally defines the HAS_BZERO symbol if

the bzero() routine is available to set memory to 0.

d_casti32 (d_casti32.U):

This variable conditionally defines CASTI32, which indicates

whether the C compiler can cast large floats to 32-bit ints.

d_castneg (d_castneg.U):

This variable conditionally defines CASTNEG, which indicates

wether the C compiler can cast negative float to unsigned.

d_charvspr (d_vprintf.U):

This variable conditionally defines CHARVSPRINTF if this system

has vsprintf returning type (char*). The trend seems to be to

declare it as "int vsprintf()".

d_chown (d_chown.U):

This variable conditionally defines the HAS_CHOWN symbol, which

indicates to the C program that the chown() routine is available.

d_chroot (d_chroot.U):

This variable conditionally defines the HAS_CHROOT symbol, which

indicates to the C program that the chroot() routine is available.

d_chsize (d_chsize.U):

This variable conditionally defines the CHSIZE symbol, which

indicates to the C program that the chsize() routine is available

to truncate files. You might need a -lx to get this routine.

d_class (d_class.U):

This variable conditionally defines the HAS_CLASS symbol, which

indicates to the C program that the class() routine is available.

d_closedir (d_closedir.U):

This variable conditionally defines HAS_CLOSEDIR if closedir() is

available.

d_cmsghdr_s (d_cmsghdr_s.U):

This variable conditionally defines the HAS_STRUCT_CMSGHDR symbol,

which indicates that the struct cmsghdr is supported.

d_const (d_const.U):

This variable conditionally defines the HASCONST symbol, which

indicates to the C program that this C compiler knows about the

const type.

d_copysignl (d_copysignl.U):

This variable conditionally defines the HAS_COPYSIGNL symbol, which

indicates to the C program that the copysignl() routine is available.

If aintl is also present we can emulate modfl.

d_crypt (d_crypt.U):

This variable conditionally defines the CRYPT symbol, which

indicates to the C program that the crypt() routine is available

to encrypt passwords and the like.

d_crypt_r (d_crypt_r.U):

This variable conditionally defines the HAS_CRYPT_R symbol,

which indicates to the C program that the crypt_r()

routine is available.

d_csh (d_csh.U):

This variable conditionally defines the CSH symbol, which

indicates to the C program that the C-shell exists.

d_ctermid_r (d_ctermid_r.U):

This variable conditionally defines the HAS_CTERMID_R symbol,

which indicates to the C program that the ctermid_r()

routine is available.

d_ctime_r (d_ctime_r.U):

This variable conditionally defines the HAS_CTIME_R symbol,

which indicates to the C program that the ctime_r()

routine is available.

d_cuserid (d_cuserid.U):

This variable conditionally defines the HAS_CUSERID symbol, which

indicates to the C program that the cuserid() routine is available

to get character login names.

d_dbl_dig (d_dbl_dig.U):

This variable conditionally defines d_dbl_dig if this system's

header files provide DBL_DIG, which is the number of significant

digits in a double precision number.

d_dbminitproto (d_dbminitproto.U):

This variable conditionally defines the HAS_DBMINIT_PROTO symbol,

which indicates to the C program that the system provides

a prototype for the dbminit() function. Otherwise, it is

up to the program to supply one.

d_difftime (d_difftime.U):

This variable conditionally defines the HAS_DIFFTIME symbol, which

indicates to the C program that the difftime() routine is available.

d_dirfd (d_dirfd.U):

This variable conditionally defines the HAS_DIRFD constant,

which indicates to the C program that dirfd() is available

to return the file descriptor of a directory stream.

d_dirnamlen (i_dirent.U):

This variable conditionally defines DIRNAMLEN, which indicates

to the C program that the length of directory entry names is

provided by a d_namelen field.

d_dlerror (d_dlerror.U):

This variable conditionally defines the HAS_DLERROR symbol, which

indicates to the C program that the dlerror() routine is available.

d_dlopen (d_dlopen.U):

This variable conditionally defines the HAS_DLOPEN symbol, which

indicates to the C program that the dlopen() routine is available.

d_dlsymun (d_dlsymun.U):

This variable conditionally defines DLSYM_NEEDS_UNDERSCORE, which

indicates that we need to prepend an underscore to the symbol

name before calling dlsym().

d_dosuid (d_dosuid.U):

This variable conditionally defines the symbol DOSUID, which

tells the C program that it should insert setuid emulation code

on hosts which have setuid #! scripts disabled.

d_drand48_r (d_drand48_r.U):

This variable conditionally defines the HAS_DRAND48_R symbol,

which indicates to the C program that the drand48_r()

routine is available.

d_drand48proto (d_drand48proto.U):

This variable conditionally defines the HAS_DRAND48_PROTO symbol,

which indicates to the C program that the system provides

a prototype for the drand48() function. Otherwise, it is

up to the program to supply one.

d_dup2 (d_dup2.U):

This variable conditionally defines HAS_DUP2 if dup2() is

available to duplicate file descriptors.

d_eaccess (d_eaccess.U):

This variable conditionally defines the HAS_EACCESS symbol, which

indicates to the C program that the eaccess() routine is available.

d_endgrent (d_endgrent.U):

This variable conditionally defines the HAS_ENDGRENT symbol, which

indicates to the C program that the endgrent() routine is available

for sequential access of the group database.

d_endgrent_r (d_endgrent_r.U):

This variable conditionally defines the HAS_ENDGRENT_R symbol,

which indicates to the C program that the endgrent_r()

routine is available.

d_endhent (d_endhent.U):

This variable conditionally defines HAS_ENDHOSTENT if endhostent() is

available to close whatever was being used for host queries.

d_endhostent_r (d_endhostent_r.U):

This variable conditionally defines the HAS_ENDHOSTENT_R symbol,

which indicates to the C program that the endhostent_r()

routine is available.

d_endnent (d_endnent.U):

This variable conditionally defines HAS_ENDNETENT if endnetent() is

available to close whatever was being used for network queries.

d_endnetent_r (d_endnetent_r.U):

This variable conditionally defines the HAS_ENDNETENT_R symbol,

which indicates to the C program that the endnetent_r()

routine is available.

d_endpent (d_endpent.U):

This variable conditionally defines HAS_ENDPROTOENT if endprotoent() is

available to close whatever was being used for protocol queries.

d_endprotoent_r (d_endprotoent_r.U):

This variable conditionally defines the HAS_ENDPROTOENT_R symbol,

which indicates to the C program that the endprotoent_r()

routine is available.

d_endpwent (d_endpwent.U):

This variable conditionally defines the HAS_ENDPWENT symbol, which

indicates to the C program that the endpwent() routine is available

for sequential access of the passwd database.

d_endpwent_r (d_endpwent_r.U):

This variable conditionally defines the HAS_ENDPWENT_R symbol,

which indicates to the C program that the endpwent_r()

routine is available.

d_endsent (d_endsent.U):

This variable conditionally defines HAS_ENDSERVENT if endservent() is

available to close whatever was being used for service queries.

d_endservent_r (d_endservent_r.U):

This variable conditionally defines the HAS_ENDSERVENT_R symbol,

which indicates to the C program that the endservent_r()

routine is available.

d_eofnblk (nblock_io.U):

This variable conditionally defines EOF_NONBLOCK if EOF can be seen

when reading from a non-blocking I/O source.

d_eunice (Guess.U):

This variable conditionally defines the symbols EUNICE and VAX, which

alerts the C program that it must deal with ideosyncracies of VMS.

d_faststdio (d_faststdio.U):

This variable conditionally defines the HAS_FAST_STDIO symbol,

which indicates to the C program that the "fast stdio" is available

to manipulate the stdio buffers directly.

d_fchdir (d_fchdir.U):

This variable conditionally defines the HAS_FCHDIR symbol, which

indicates to the C program that the fchdir() routine is available.

d_fchmod (d_fchmod.U):

This variable conditionally defines the HAS_FCHMOD symbol, which

indicates to the C program that the fchmod() routine is available

to change mode of opened files.

d_fchown (d_fchown.U):

This variable conditionally defines the HAS_FCHOWN symbol, which

indicates to the C program that the fchown() routine is available

to change ownership of opened files.

d_fcntl (d_fcntl.U):

This variable conditionally defines the HAS_FCNTL symbol, and indicates

whether the fcntl() function exists

d_fcntl_can_lock (d_fcntl_can_lock.U):

This variable conditionally defines the FCNTL_CAN_LOCK symbol

and indicates whether file locking with fcntl() works.

d_fd_macros (d_fd_set.U):

This variable contains the eventual value of the HAS_FD_MACROS symbol,

which indicates if your C compiler knows about the macros which

manipulate an fd_set.

d_fd_set (d_fd_set.U):

This variable contains the eventual value of the HAS_FD_SET symbol,

which indicates if your C compiler knows about the fd_set typedef.

d_fds_bits (d_fd_set.U):

This variable contains the eventual value of the HAS_FDS_BITS symbol,

which indicates if your fd_set typedef contains the fds_bits member.

If you have an fd_set typedef, but the dweebs who installed it did

a half-fast job and neglected to provide the macros to manipulate

an fd_set, HAS_FDS_BITS will let us know how to fix the gaffe.

d_fgetpos (d_fgetpos.U):

This variable conditionally defines HAS_FGETPOS if fgetpos() is

available to get the file position indicator.

d_finite (d_finite.U):

This variable conditionally defines the HAS_FINITE symbol, which

indicates to the C program that the finite() routine is available.

d_finitel (d_finitel.U):

This variable conditionally defines the HAS_FINITEL symbol, which

indicates to the C program that the finitel() routine is available.

d_flexfnam (d_flexfnam.U):

This variable conditionally defines the FLEXFILENAMES symbol, which

indicates that the system supports filenames longer than 14 characters.

d_flock (d_flock.U):

This variable conditionally defines HAS_FLOCK if flock() is

available to do file locking.

d_flockproto (d_flockproto.U):

This variable conditionally defines the HAS_FLOCK_PROTO symbol,

which indicates to the C program that the system provides

a prototype for the flock() function. Otherwise, it is

up to the program to supply one.

d_fork (d_fork.U):

This variable conditionally defines the HAS_FORK symbol, which

indicates to the C program that the fork() routine is available.

d_fp_class (d_fp_class.U):

This variable conditionally defines the HAS_FP_CLASS symbol, which

indicates to the C program that the fp_class() routine is available.

d_fpathconf (d_pathconf.U):

This variable conditionally defines the HAS_FPATHCONF symbol, which

indicates to the C program that the pathconf() routine is available

to determine file-system related limits and options associated

with a given open file descriptor.

d_fpclass (d_fpclass.U):

This variable conditionally defines the HAS_FPCLASS symbol, which

indicates to the C program that the fpclass() routine is available.

d_fpclassify (d_fpclassify.U):

This variable conditionally defines the HAS_FPCLASSIFY symbol, which

indicates to the C program that the fpclassify() routine is available.

d_fpclassl (d_fpclassl.U):

This variable conditionally defines the HAS_FPCLASSL symbol, which

indicates to the C program that the fpclassl() routine is available.

d_fpos64_t (d_fpos64_t.U):

This symbol will be defined if the C compiler supports fpos64_t.

d_frexpl (d_frexpl.U):

This variable conditionally defines the HAS_FREXPL symbol, which

indicates to the C program that the frexpl() routine is available.

d_fs_data_s (d_fs_data_s.U):

This variable conditionally defines the HAS_STRUCT_FS_DATA symbol,

which indicates that the struct fs_data is supported.

d_fseeko (d_fseeko.U):

This variable conditionally defines the HAS_FSEEKO symbol, which

indicates to the C program that the fseeko() routine is available.

d_fsetpos (d_fsetpos.U):

This variable conditionally defines HAS_FSETPOS if fsetpos() is

available to set the file position indicator.

d_fstatfs (d_fstatfs.U):

This variable conditionally defines the HAS_FSTATFS symbol, which

indicates to the C program that the fstatfs() routine is available.

d_fstatvfs (d_statvfs.U):

This variable conditionally defines the HAS_FSTATVFS symbol, which

indicates to the C program that the fstatvfs() routine is available.

d_fsync (d_fsync.U):

This variable conditionally defines the HAS_FSYNC symbol, which

indicates to the C program that the fsync() routine is available.

d_ftello (d_ftello.U):

This variable conditionally defines the HAS_FTELLO symbol, which

indicates to the C program that the ftello() routine is available.

d_ftime (d_ftime.U):

This variable conditionally defines the HAS_FTIME symbol, which indicates

that the ftime() routine exists. The ftime() routine is basically

a sub-second accuracy clock.

d_Gconvert (d_gconvert.U):

This variable holds what Gconvert is defined as to convert

floating point numbers into strings. By default, Configure

sets this macro to use the first of gconvert, gcvt, or sprintf

that pass sprintf-%g-like behaviour tests. If perl is using

long doubles, the macro uses the first of the following

functions that pass Configure's tests: qgcvt, sprintf (if

Configure knows how to make sprintf format long doubles--see

sPRIgldbl), gconvert, gcvt, and sprintf (casting to double).

The gconvert_preference and gconvert_ld_preference variables

can be used to alter Configure's preferences, for doubles and

long doubles, respectively. If present, they contain a

space-separated list of one or more of the above function

names in the order they should be tried.

d_Gconvert may be set to override Configure with a platform-

specific function. If this function expects a double, a

different value may need to be set by the uselongdouble.cbu

call-back unit so that long doubles can be formatted without

loss of precision.

d_getcwd (d_getcwd.U):

This variable conditionally defines the HAS_GETCWD symbol, which

indicates to the C program that the getcwd() routine is available

to get the current working directory.

d_getespwnam (d_getespwnam.U):

This variable conditionally defines HAS_GETESPWNAM if getespwnam() is

available to retrieve enchanced (shadow) password entries by name.

d_getfsstat (d_getfsstat.U):

This variable conditionally defines the HAS_GETFSSTAT symbol, which

indicates to the C program that the getfsstat() routine is available.

d_getgrent (d_getgrent.U):

This variable conditionally defines the HAS_GETGRENT symbol, which

indicates to the C program that the getgrent() routine is available

for sequential access of the group database.

d_getgrent_r (d_getgrent_r.U):

This variable conditionally defines the HAS_GETGRENT_R symbol,

which indicates to the C program that the getgrent_r()

routine is available.

d_getgrgid_r (d_getgrgid_r.U):

This variable conditionally defines the HAS_GETGRGID_R symbol,

which indicates to the C program that the getgrgid_r()

routine is available.

d_getgrnam_r (d_getgrnam_r.U):

This variable conditionally defines the HAS_GETGRNAM_R symbol,

which indicates to the C program that the getgrnam_r()

routine is available.

d_getgrps (d_getgrps.U):

This variable conditionally defines the HAS_GETGROUPS symbol, which

indicates to the C program that the getgroups() routine is available

to get the list of process groups.

d_gethbyaddr (d_gethbyad.U):

This variable conditionally defines the HAS_GETHOSTBYADDR symbol, which

indicates to the C program that the gethostbyaddr() routine is available

to look up hosts by their IP addresses.

d_gethbyname (d_gethbynm.U):

This variable conditionally defines the HAS_GETHOSTBYNAME symbol, which

indicates to the C program that the gethostbyname() routine is available

to look up host names in some data base or other.

d_gethent (d_gethent.U):

This variable conditionally defines HAS_GETHOSTENT if gethostent() is

available to look up host names in some data base or another.

d_gethname (d_gethname.U):

This variable conditionally defines the HAS_GETHOSTNAME symbol, which

indicates to the C program that the gethostname() routine may be

used to derive the host name.

d_gethostbyaddr_r (d_gethostbyaddr_r.U):

This variable conditionally defines the HAS_GETHOSTBYADDR_R symbol,

which indicates to the C program that the gethostbyaddr_r()

routine is available.

d_gethostbyname_r (d_gethostbyname_r.U):

This variable conditionally defines the HAS_GETHOSTBYNAME_R symbol,

which indicates to the C program that the gethostbyname_r()

routine is available.

d_gethostent_r (d_gethostent_r.U):

This variable conditionally defines the HAS_GETHOSTENT_R symbol,

which indicates to the C program that the gethostent_r()

routine is available.

d_gethostprotos (d_gethostprotos.U):

This variable conditionally defines the HAS_GETHOST_PROTOS symbol,

which indicates to the C program that <netdb.h> supplies

prototypes for the various gethost*() functions.

See also netdbtype.U for probing for various netdb types.

d_getitimer (d_getitimer.U):

This variable conditionally defines the HAS_GETITIMER symbol, which

indicates to the C program that the getitimer() routine is available.

d_getlogin (d_getlogin.U):

This variable conditionally defines the HAS_GETLOGIN symbol, which

indicates to the C program that the getlogin() routine is available

to get the login name.

d_getlogin_r (d_getlogin_r.U):

This variable conditionally defines the HAS_GETLOGIN_R symbol,

which indicates to the C program that the getlogin_r()

routine is available.

d_getmnt (d_getmnt.U):

This variable conditionally defines the HAS_GETMNT symbol, which

indicates to the C program that the getmnt() routine is available

to retrieve one or more mount info blocks by filename.

d_getmntent (d_getmntent.U):

This variable conditionally defines the HAS_GETMNTENT symbol, which

indicates to the C program that the getmntent() routine is available

to iterate through mounted files to get their mount info.

d_getnbyaddr (d_getnbyad.U):

This variable conditionally defines the HAS_GETNETBYADDR symbol, which

indicates to the C program that the getnetbyaddr() routine is available

to look up networks by their IP addresses.

d_getnbyname (d_getnbynm.U):

This variable conditionally defines the HAS_GETNETBYNAME symbol, which

indicates to the C program that the getnetbyname() routine is available

to look up networks by their names.

d_getnent (d_getnent.U):

This variable conditionally defines HAS_GETNETENT if getnetent() is

available to look up network names in some data base or another.

d_getnetbyaddr_r (d_getnetbyaddr_r.U):

This variable conditionally defines the HAS_GETNETBYADDR_R symbol,

which indicates to the C program that the getnetbyaddr_r()

routine is available.

d_getnetbyname_r (d_getnetbyname_r.U):

This variable conditionally defines the HAS_GETNETBYNAME_R symbol,

which indicates to the C program that the getnetbyname_r()

routine is available.

d_getnetent_r (d_getnetent_r.U):

This variable conditionally defines the HAS_GETNETENT_R symbol,

which indicates to the C program that the getnetent_r()

routine is available.

d_getnetprotos (d_getnetprotos.U):

This variable conditionally defines the HAS_GETNET_PROTOS symbol,

which indicates to the C program that <netdb.h> supplies

prototypes for the various getnet*() functions.

See also netdbtype.U for probing for various netdb types.

d_getpagsz (d_getpagsz.U):

This variable conditionally defines HAS_GETPAGESIZE if getpagesize()

is available to get the system page size.

d_getpbyname (d_getprotby.U):

This variable conditionally defines the HAS_GETPROTOBYNAME

symbol, which indicates to the C program that the

getprotobyname() routine is available to look up protocols

by their name.

d_getpbynumber (d_getprotby.U):

This variable conditionally defines the HAS_GETPROTOBYNUMBER

symbol, which indicates to the C program that the

getprotobynumber() routine is available to look up protocols

by their number.

d_getpent (d_getpent.U):

This variable conditionally defines HAS_GETPROTOENT if getprotoent() is

available to look up protocols in some data base or another.

d_getpgid (d_getpgid.U):

This variable conditionally defines the HAS_GETPGID symbol, which

indicates to the C program that the getpgid(pid) function

is available to get the process group id.

d_getpgrp2 (d_getpgrp2.U):

This variable conditionally defines the HAS_GETPGRP2 symbol, which

indicates to the C program that the getpgrp2() (as in DG/UX) routine

is available to get the current process group.

d_getpgrp (d_getpgrp.U):

This variable conditionally defines HAS_GETPGRP if getpgrp() is

available to get the current process group.

d_getppid (d_getppid.U):

This variable conditionally defines the HAS_GETPPID symbol, which

indicates to the C program that the getppid() routine is available

to get the parent process ID.

d_getprior (d_getprior.U):

This variable conditionally defines HAS_GETPRIORITY if getpriority()

is available to get a process's priority.

d_getprotobyname_r (d_getprotobyname_r.U):

This variable conditionally defines the HAS_GETPROTOBYNAME_R symbol,

which indicates to the C program that the getprotobyname_r()

routine is available.

d_getprotobynumber_r (d_getprotobynumber_r.U):

This variable conditionally defines the HAS_GETPROTOBYNUMBER_R symbol,

which indicates to the C program that the getprotobynumber_r()

routine is available.

d_getprotoent_r (d_getprotoent_r.U):

This variable conditionally defines the HAS_GETPROTOENT_R symbol,

which indicates to the C program that the getprotoent_r()

routine is available.

d_getprotoprotos (d_getprotoprotos.U):

This variable conditionally defines the HAS_GETPROTO_PROTOS symbol,

which indicates to the C program that <netdb.h> supplies

prototypes for the various getproto*() functions.

See also netdbtype.U for probing for various netdb types.

d_getprpwnam (d_getprpwnam.U):

This variable conditionally defines HAS_GETPRPWNAM if getprpwnam() is

available to retrieve protected (shadow) password entries by name.

d_getpwent (d_getpwent.U):

This variable conditionally defines the HAS_GETPWENT symbol, which

indicates to the C program that the getpwent() routine is available

for sequential access of the passwd database.

d_getpwent_r (d_getpwent_r.U):

This variable conditionally defines the HAS_GETPWENT_R symbol,

which indicates to the C program that the getpwent_r()

routine is available.

d_getpwnam_r (d_getpwnam_r.U):

This variable conditionally defines the HAS_GETPWNAM_R symbol,

which indicates to the C program that the getpwnam_r()

routine is available.

d_getpwuid_r (d_getpwuid_r.U):

This variable conditionally defines the HAS_GETPWUID_R symbol,

which indicates to the C program that the getpwuid_r()

routine is available.

d_getsbyname (d_getsrvby.U):

This variable conditionally defines the HAS_GETSERVBYNAME

symbol, which indicates to the C program that the

getservbyname() routine is available to look up services

by their name.

d_getsbyport (d_getsrvby.U):

This variable conditionally defines the HAS_GETSERVBYPORT

symbol, which indicates to the C program that the

getservbyport() routine is available to look up services

by their port.

d_getsent (d_getsent.U):

This variable conditionally defines HAS_GETSERVENT if getservent() is

available to look up network services in some data base or another.

d_getservbyname_r (d_getservbyname_r.U):

This variable conditionally defines the HAS_GETSERVBYNAME_R symbol,

which indicates to the C program that the getservbyname_r()

routine is available.

d_getservbyport_r (d_getservbyport_r.U):

This variable conditionally defines the HAS_GETSERVBYPORT_R symbol,

which indicates to the C program that the getservbyport_r()

routine is available.

d_getservent_r (d_getservent_r.U):

This variable conditionally defines the HAS_GETSERVENT_R symbol,

which indicates to the C program that the getservent_r()

routine is available.

d_getservprotos (d_getservprotos.U):

This variable conditionally defines the HAS_GETSERV_PROTOS symbol,

which indicates to the C program that <netdb.h> supplies

prototypes for the various getserv*() functions.

See also netdbtype.U for probing for various netdb types.

d_getspnam (d_getspnam.U):

This variable conditionally defines HAS_GETSPNAM if getspnam() is

available to retrieve SysV shadow password entries by name.

d_getspnam_r (d_getspnam_r.U):

This variable conditionally defines the HAS_GETSPNAM_R symbol,

which indicates to the C program that the getspnam_r()

routine is available.

d_gettimeod (d_ftime.U):

This variable conditionally defines the HAS_GETTIMEOFDAY symbol, which

indicates that the gettimeofday() system call exists (to obtain a

sub-second accuracy clock). You should probably include <sys/resource.h>.

d_gmtime_r (d_gmtime_r.U):

This variable conditionally defines the HAS_GMTIME_R symbol,

which indicates to the C program that the gmtime_r()

routine is available.

d_gnulibc (d_gnulibc.U):

Defined if we're dealing with the GNU C Library.

d_grpasswd (i_grp.U):

This variable conditionally defines GRPASSWD, which indicates

that struct group in <grp.h> contains gr_passwd.

d_hasmntopt (d_hasmntopt.U):

This variable conditionally defines the HAS_HASMNTOPT symbol, which

indicates to the C program that the hasmntopt() routine is available

to query the mount options of file systems.

d_htonl (d_htonl.U):

This variable conditionally defines HAS_HTONL if htonl() and its

friends are available to do network order byte swapping.

d_ilogbl (d_ilogbl.U):

This variable conditionally defines the HAS_ILOGBL symbol, which

indicates to the C program that the ilogbl() routine is available.

If scalbnl is also present we can emulate frexpl.

d_index (d_strchr.U):

This variable conditionally defines HAS_INDEX if index() and

rindex() are available for string searching.

d_inetaton (d_inetaton.U):

This variable conditionally defines the HAS_INET_ATON symbol, which

indicates to the C program that the inet_aton() function is available

to parse IP address "dotted-quad" strings.

d_int64_t (d_int64_t.U):

This symbol will be defined if the C compiler supports int64_t.

d_isascii (d_isascii.U):

This variable conditionally defines the HAS_ISASCII constant,

which indicates to the C program that isascii() is available.

d_isfinite (d_isfinite.U):

This variable conditionally defines the HAS_ISFINITE symbol, which

indicates to the C program that the isfinite() routine is available.

d_isinf (d_isinf.U):

This variable conditionally defines the HAS_ISINF symbol, which

indicates to the C program that the isinf() routine is available.

d_isnan (d_isnan.U):

This variable conditionally defines the HAS_ISNAN symbol, which

indicates to the C program that the isnan() routine is available.

d_isnanl (d_isnanl.U):

This variable conditionally defines the HAS_ISNANL symbol, which

indicates to the C program that the isnanl() routine is available.

d_killpg (d_killpg.U):

This variable conditionally defines the HAS_KILLPG symbol, which

indicates to the C program that the killpg() routine is available

to kill process groups.

d_lchown (d_lchown.U):

This variable conditionally defines the HAS_LCHOWN symbol, which

indicates to the C program that the lchown() routine is available

to operate on a symbolic link (instead of following the link).

d_ldbl_dig (d_ldbl_dig.U):

This variable conditionally defines d_ldbl_dig if this system's

header files provide LDBL_DIG, which is the number of significant

digits in a long double precision number.

d_link (d_link.U):

This variable conditionally defines HAS_LINK if link() is

available to create hard links.

d_localtime_r (d_localtime_r.U):

This variable conditionally defines the HAS_LOCALTIME_R symbol,

which indicates to the C program that the localtime_r()

routine is available.

d_locconv (d_locconv.U):

This variable conditionally defines HAS_LOCALECONV if localeconv() is

available for numeric and monetary formatting conventions.

d_lockf (d_lockf.U):

This variable conditionally defines HAS_LOCKF if lockf() is

available to do file locking.

d_longdbl (d_longdbl.U):

This variable conditionally defines HAS_LONG_DOUBLE if

the long double type is supported.

d_longlong (d_longlong.U):

This variable conditionally defines HAS_LONG_LONG if

the long long type is supported.

d_lseekproto (d_lseekproto.U):

This variable conditionally defines the HAS_LSEEK_PROTO symbol,

which indicates to the C program that the system provides

a prototype for the lseek() function. Otherwise, it is

up to the program to supply one.

d_lstat (d_lstat.U):

This variable conditionally defines HAS_LSTAT if lstat() is

available to do file stats on symbolic links.

d_madvise (d_madvise.U):

This variable conditionally defines HAS_MADVISE if madvise() is

available to map a file into memory.

d_mblen (d_mblen.U):

This variable conditionally defines the HAS_MBLEN symbol, which

indicates to the C program that the mblen() routine is available

to find the number of bytes in a multibye character.

d_mbstowcs (d_mbstowcs.U):

This variable conditionally defines the HAS_MBSTOWCS symbol, which

indicates to the C program that the mbstowcs() routine is available

to convert a multibyte string into a wide character string.

d_mbtowc (d_mbtowc.U):

This variable conditionally defines the HAS_MBTOWC symbol, which

indicates to the C program that the mbtowc() routine is available

to convert multibyte to a wide character.

d_memchr (d_memchr.U):

This variable conditionally defines the HAS_MEMCHR symbol, which

indicates to the C program that the memchr() routine is available

to locate characters within a C string.

d_memcmp (d_memcmp.U):

This variable conditionally defines the HAS_MEMCMP symbol, which

indicates to the C program that the memcmp() routine is available

to compare blocks of memory.

d_memcpy (d_memcpy.U):

This variable conditionally defines the HAS_MEMCPY symbol, which

indicates to the C program that the memcpy() routine is available

to copy blocks of memory.

d_memmove (d_memmove.U):

This variable conditionally defines the HAS_MEMMOVE symbol, which

indicates to the C program that the memmove() routine is available

to copy potentatially overlapping blocks of memory.

d_memset (d_memset.U):

This variable conditionally defines the HAS_MEMSET symbol, which

indicates to the C program that the memset() routine is available

to set blocks of memory.

d_mkdir (d_mkdir.U):

This variable conditionally defines the HAS_MKDIR symbol, which

indicates to the C program that the mkdir() routine is available

to create directories..

d_mkdtemp (d_mkdtemp.U):

This variable conditionally defines the HAS_MKDTEMP symbol, which

indicates to the C program that the mkdtemp() routine is available

to exclusively create a uniquely named temporary directory.

d_mkfifo (d_mkfifo.U):

This variable conditionally defines the HAS_MKFIFO symbol, which

indicates to the C program that the mkfifo() routine is available.

d_mkstemp (d_mkstemp.U):

This variable conditionally defines the HAS_MKSTEMP symbol, which

indicates to the C program that the mkstemp() routine is available

to exclusively create and open a uniquely named temporary file.

d_mkstemps (d_mkstemps.U):

This variable conditionally defines the HAS_MKSTEMPS symbol, which

indicates to the C program that the mkstemps() routine is available

to exclusively create and open a uniquely named (with a suffix)

temporary file.

d_mktime (d_mktime.U):

This variable conditionally defines the HAS_MKTIME symbol, which

indicates to the C program that the mktime() routine is available.

d_mmap (d_mmap.U):

This variable conditionally defines HAS_MMAP if mmap() is

available to map a file into memory.

d_modfl (d_modfl.U):

This variable conditionally defines the HAS_MODFL symbol, which

indicates to the C program that the modfl() routine is available.

d_modfl_pow32_bug (d_modfl.U):

This variable conditionally defines the HAS_MODFL_POW32_BUG symbol,

which indicates that modfl() is broken for long doubles >= pow(2, 32).

For example from 4294967303.150000 one would get 4294967302.000000

and 1.150000. The bug has been seen in certain versions of glibc,

release 2.2.2 is known to be okay.

d_modflproto (d_modfl.U):

This symbol, if defined, indicates that the system provides

a prototype for the modfl() function. Otherwise, it is up

to the program to supply one. C99 says it should be

long double modfl(long double, long double *);

d_mprotect (d_mprotect.U):

This variable conditionally defines HAS_MPROTECT if mprotect() is

available to modify the access protection of a memory mapped file.

d_msg (d_msg.U):

This variable conditionally defines the HAS_MSG symbol, which

indicates that the entire msg*(2) library is present.

d_msg_ctrunc (d_socket.U):

This variable conditionally defines the HAS_MSG_CTRUNC symbol,

which indicates that the MSG_CTRUNC is available. #ifdef is

not enough because it may be an enum, glibc has been known to do this.

d_msg_dontroute (d_socket.U):

This variable conditionally defines the HAS_MSG_DONTROUTE symbol,

which indicates that the MSG_DONTROUTE is available. #ifdef is

not enough because it may be an enum, glibc has been known to do this.

d_msg_oob (d_socket.U):

This variable conditionally defines the HAS_MSG_OOB symbol,

which indicates that the MSG_OOB is available. #ifdef is

not enough because it may be an enum, glibc has been known to do this.

d_msg_peek (d_socket.U):

This variable conditionally defines the HAS_MSG_PEEK symbol,

which indicates that the MSG_PEEK is available. #ifdef is

not enough because it may be an enum, glibc has been known to do this.

d_msg_proxy (d_socket.U):

This variable conditionally defines the HAS_MSG_PROXY symbol,

which indicates that the MSG_PROXY is available. #ifdef is

not enough because it may be an enum, glibc has been known to do this.

d_msgctl (d_msgctl.U):

This variable conditionally defines the HAS_MSGCTL symbol, which

indicates to the C program that the msgctl() routine is available.

d_msgget (d_msgget.U):

This variable conditionally defines the HAS_MSGGET symbol, which

indicates to the C program that the msgget() routine is available.

d_msghdr_s (d_msghdr_s.U):

This variable conditionally defines the HAS_STRUCT_MSGHDR symbol,

which indicates that the struct msghdr is supported.

d_msgrcv (d_msgrcv.U):

This variable conditionally defines the HAS_MSGRCV symbol, which

indicates to the C program that the msgrcv() routine is available.

d_msgsnd (d_msgsnd.U):

This variable conditionally defines the HAS_MSGSND symbol, which

indicates to the C program that the msgsnd() routine is available.

d_msync (d_msync.U):

This variable conditionally defines HAS_MSYNC if msync() is

available to synchronize a mapped file.

d_munmap (d_munmap.U):

This variable conditionally defines HAS_MUNMAP if munmap() is

available to unmap a region mapped by mmap().

d_mymalloc (mallocsrc.U):

This variable conditionally defines MYMALLOC in case other parts

of the source want to take special action if MYMALLOC is used.

This may include different sorts of profiling or error detection.

d_nanosleep (d_nanosleep.U):

This variable conditionally defines HAS_NANOSLEEP

if nanosleep() is available to sleep with 1E-9 sec accuracy.

d_nice (d_nice.U):

This variable conditionally defines the HAS_NICE symbol, which

indicates to the C program that the nice() routine is available.

d_nl_langinfo (d_nl_langinfo.U):

This variable conditionally defines the HAS_NL_LANGINFO symbol, which

indicates to the C program that the nl_langinfo() routine is available.

d_nv_preserves_uv (perlxv.U):

This variable indicates whether a variable of type nvtype

can preserve all the bits a variable of type uvtype.

d_off64_t (d_off64_t.U):

This symbol will be defined if the C compiler supports off64_t.

d_old_pthread_create_joinable (d_pthrattrj.U):

This variable conditionally defines pthread_create_joinable.

undef if pthread.h defines PTHREAD_CREATE_JOINABLE.

d_oldpthreads (usethreads.U):

This variable conditionally defines the OLD_PTHREADS_API symbol,

and indicates that Perl should be built to use the old

draft POSIX threads API. This is only potentially meaningful if

usethreads is set.

d_oldsock (d_socket.U):

This variable conditionally defines the OLDSOCKET symbol, which

indicates that the BSD socket interface is based on 4.1c and not 4.2.

d_open3 (d_open3.U):

This variable conditionally defines the HAS_OPEN3 manifest constant,

which indicates to the C program that the 3 argument version of

the open(2) function is available.

d_pathconf (d_pathconf.U):

This variable conditionally defines the HAS_PATHCONF symbol, which

indicates to the C program that the pathconf() routine is available

to determine file-system related limits and options associated

with a given filename.

d_pause (d_pause.U):

This variable conditionally defines the HAS_PAUSE symbol, which

indicates to the C program that the pause() routine is available

to suspend a process until a signal is received.

d_perl_otherlibdirs (otherlibdirs.U):

This variable conditionally defines PERL_OTHERLIBDIRS, which

contains a colon-separated set of paths for the perl binary to

include in @INC. See also otherlibdirs.

d_phostname (d_gethname.U):

This variable conditionally defines the HAS_PHOSTNAME symbol, which

contains the shell command which, when fed to popen(), may be

used to derive the host name.

d_pipe (d_pipe.U):

This variable conditionally defines the HAS_PIPE symbol, which

indicates to the C program that the pipe() routine is available

to create an inter-process channel.

d_poll (d_poll.U):

This variable conditionally defines the HAS_POLL symbol, which

indicates to the C program that the poll() routine is available

to poll active file descriptors.

d_portable (d_portable.U):

This variable conditionally defines the PORTABLE symbol, which

indicates to the C program that it should not assume that it is

running on the machine it was compiled on.

d_PRId64 (quadfio.U):

This variable conditionally defines the PERL_PRId64 symbol, which

indiciates that stdio has a symbol to print 64-bit decimal numbers.

d_PRIeldbl (longdblfio.U):

This variable conditionally defines the PERL_PRIfldbl symbol, which

indiciates that stdio has a symbol to print long doubles.

d_PRIEUldbl (longdblfio.U):

This variable conditionally defines the PERL_PRIfldbl symbol, which

indiciates that stdio has a symbol to print long doubles.

The 'U' in the name is to separate this from d_PRIeldbl so that even

case-blind systems can see the difference.

d_PRIfldbl (longdblfio.U):

This variable conditionally defines the PERL_PRIfldbl symbol, which

indiciates that stdio has a symbol to print long doubles.

d_PRIFUldbl (longdblfio.U):

This variable conditionally defines the PERL_PRIfldbl symbol, which

indiciates that stdio has a symbol to print long doubles.

The 'U' in the name is to separate this from d_PRIfldbl so that even

case-blind systems can see the difference.

d_PRIgldbl (longdblfio.U):

This variable conditionally defines the PERL_PRIfldbl symbol, which

indiciates that stdio has a symbol to print long doubles.

d_PRIGUldbl (longdblfio.U):

This variable conditionally defines the PERL_PRIfldbl symbol, which

indiciates that stdio has a symbol to print long doubles.

The 'U' in the name is to separate this from d_PRIgldbl so that even

case-blind systems can see the difference.

d_PRIi64 (quadfio.U):

This variable conditionally defines the PERL_PRIi64 symbol, which

indiciates that stdio has a symbol to print 64-bit decimal numbers.

d_PRIo64 (quadfio.U):

This variable conditionally defines the PERL_PRIo64 symbol, which

indiciates that stdio has a symbol to print 64-bit octal numbers.

d_PRIu64 (quadfio.U):

This variable conditionally defines the PERL_PRIu64 symbol, which

indiciates that stdio has a symbol to print 64-bit unsigned decimal

numbers.

d_PRIx64 (quadfio.U):

This variable conditionally defines the PERL_PRIx64 symbol, which

indiciates that stdio has a symbol to print 64-bit hexadecimal numbers.

d_PRIXU64 (quadfio.U):

This variable conditionally defines the PERL_PRIXU64 symbol, which

indiciates that stdio has a symbol to print 64-bit hExADECimAl numbers.

The 'U' in the name is to separate this from d_PRIx64 so that even

case-blind systems can see the difference.

d_procselfexe (d_procselfexe.U):

Defined if $procselfexe is symlink to the absolute

pathname of the executing program.

d_pthread_atfork (d_pthread_atfork.U):

This variable conditionally defines the HAS_PTHREAD_ATFORK symbol,

which indicates to the C program that the pthread_atfork()

routine is available.

d_pthread_attr_setscope (d_pthread_attr_ss.U):

This variable conditionally defines HAS_PTHREAD_ATTR_SETSCOPE if

pthread_attr_setscope() is available to set the contention scope

attribute of a thread attribute object.

d_pthread_yield (d_pthread_y.U):

This variable conditionally defines the HAS_PTHREAD_YIELD

symbol if the pthread_yield routine is available to yield

the execution of the current thread.

d_pwage (i_pwd.U):

This variable conditionally defines PWAGE, which indicates

that struct passwd contains pw_age.

d_pwchange (i_pwd.U):

This variable conditionally defines PWCHANGE, which indicates

that struct passwd contains pw_change.

d_pwclass (i_pwd.U):

This variable conditionally defines PWCLASS, which indicates

that struct passwd contains pw_class.

d_pwcomment (i_pwd.U):

This variable conditionally defines PWCOMMENT, which indicates

that struct passwd contains pw_comment.

d_pwexpire (i_pwd.U):

This variable conditionally defines PWEXPIRE, which indicates

that struct passwd contains pw_expire.

d_pwgecos (i_pwd.U):

This variable conditionally defines PWGECOS, which indicates

that struct passwd contains pw_gecos.

d_pwpasswd (i_pwd.U):

This variable conditionally defines PWPASSWD, which indicates

that struct passwd contains pw_passwd.

d_pwquota (i_pwd.U):

This variable conditionally defines PWQUOTA, which indicates

that struct passwd contains pw_quota.

d_qgcvt (d_qgcvt.U):

This variable conditionally defines the HAS_QGCVT symbol, which

indicates to the C program that the qgcvt() routine is available.

d_quad (quadtype.U):

This variable, if defined, tells that there's a 64-bit integer type,

quadtype.

d_random_r (d_random_r.U):

This variable conditionally defines the HAS_RANDOM_R symbol,

which indicates to the C program that the random_r()

routine is available.

d_readdir64_r (d_readdir64_r.U):

This variable conditionally defines the HAS_READDIR64_R symbol,

which indicates to the C program that the readdir64_r()

routine is available.

d_readdir (d_readdir.U):

This variable conditionally defines HAS_READDIR if readdir() is

available to read directory entries.

d_readdir_r (d_readdir_r.U):

This variable conditionally defines the HAS_READDIR_R symbol,

which indicates to the C program that the readdir_r()

routine is available.

d_readlink (d_readlink.U):

This variable conditionally defines the HAS_READLINK symbol, which

indicates to the C program that the readlink() routine is available

to read the value of a symbolic link.

d_readv (d_readv.U):

This variable conditionally defines the HAS_READV symbol, which

indicates to the C program that the readv() routine is available.

d_recvmsg (d_recvmsg.U):

This variable conditionally defines the HAS_RECVMSG symbol, which

indicates to the C program that the recvmsg() routine is available.

d_rename (d_rename.U):

This variable conditionally defines the HAS_RENAME symbol, which

indicates to the C program that the rename() routine is available

to rename files.

d_rewinddir (d_readdir.U):

This variable conditionally defines HAS_REWINDDIR if rewinddir() is

available.

d_rmdir (d_rmdir.U):

This variable conditionally defines HAS_RMDIR if rmdir() is

available to remove directories.

d_safebcpy (d_safebcpy.U):

This variable conditionally defines the HAS_SAFE_BCOPY symbol if

the bcopy() routine can do overlapping copies. Normally, you

should probably use memmove().

d_safemcpy (d_safemcpy.U):

This variable conditionally defines the HAS_SAFE_MEMCPY symbol if

the memcpy() routine can do overlapping copies.

For overlapping copies, memmove() should be used, if available.

d_sanemcmp (d_sanemcmp.U):

This variable conditionally defines the HAS_SANE_MEMCMP symbol if

the memcpy() routine is available and can be used to compare relative

magnitudes of chars with their high bits set.

d_sbrkproto (d_sbrkproto.U):

This variable conditionally defines the HAS_SBRK_PROTO symbol,

which indicates to the C program that the system provides

a prototype for the sbrk() function. Otherwise, it is

up to the program to supply one.

d_scalbnl (d_scalbnl.U):

This variable conditionally defines the HAS_SCALBNL symbol, which

indicates to the C program that the scalbnl() routine is available.

If ilogbl is also present we can emulate frexpl.

d_sched_yield (d_pthread_y.U):

This variable conditionally defines the HAS_SCHED_YIELD

symbol if the sched_yield routine is available to yield

the execution of the current thread.

d_scm_rights (d_socket.U):

This variable conditionally defines the HAS_SCM_RIGHTS symbol,

which indicates that the SCM_RIGHTS is available. #ifdef is

not enough because it may be an enum, glibc has been known to do this.

d_SCNfldbl (longdblfio.U):

This variable conditionally defines the PERL_PRIfldbl symbol, which

indiciates that stdio has a symbol to scan long doubles.

d_seekdir (d_readdir.U):

This variable conditionally defines HAS_SEEKDIR if seekdir() is

available.

d_select (d_select.U):

This variable conditionally defines HAS_SELECT if select() is

available to select active file descriptors. A <sys/time.h>

inclusion may be necessary for the timeout field.

d_sem (d_sem.U):

This variable conditionally defines the HAS_SEM symbol, which

indicates that the entire sem*(2) library is present.

d_semctl (d_semctl.U):

This variable conditionally defines the HAS_SEMCTL symbol, which

indicates to the C program that the semctl() routine is available.

d_semctl_semid_ds (d_union_semun.U):

This variable conditionally defines USE_SEMCTL_SEMID_DS, which

indicates that struct semid_ds * is to be used for semctl IPC_STAT.

d_semctl_semun (d_union_semun.U):

This variable conditionally defines USE_SEMCTL_SEMUN, which

indicates that union semun is to be used for semctl IPC_STAT.

d_semget (d_semget.U):

This variable conditionally defines the HAS_SEMGET symbol, which

indicates to the C program that the semget() routine is available.

d_semop (d_semop.U):

This variable conditionally defines the HAS_SEMOP symbol, which

indicates to the C program that the semop() routine is available.

d_sendmsg (d_sendmsg.U):

This variable conditionally defines the HAS_SENDMSG symbol, which

indicates to the C program that the sendmsg() routine is available.

d_setegid (d_setegid.U):

This variable conditionally defines the HAS_SETEGID symbol, which

indicates to the C program that the setegid() routine is available

to change the effective gid of the current program.

d_seteuid (d_seteuid.U):

This variable conditionally defines the HAS_SETEUID symbol, which

indicates to the C program that the seteuid() routine is available

to change the effective uid of the current program.

d_setgrent (d_setgrent.U):

This variable conditionally defines the HAS_SETGRENT symbol, which

indicates to the C program that the setgrent() routine is available

for initializing sequential access to the group database.

d_setgrent_r (d_setgrent_r.U):

This variable conditionally defines the HAS_SETGRENT_R symbol,

which indicates to the C program that the setgrent_r()

routine is available.

d_setgrps (d_setgrps.U):

This variable conditionally defines the HAS_SETGROUPS symbol, which

indicates to the C program that the setgroups() routine is available

to set the list of process groups.

d_sethent (d_sethent.U):

This variable conditionally defines HAS_SETHOSTENT if sethostent() is

available.

d_sethostent_r (d_sethostent_r.U):

This variable conditionally defines the HAS_SETHOSTENT_R symbol,

which indicates to the C program that the sethostent_r()

routine is available.

d_setitimer (d_setitimer.U):

This variable conditionally defines the HAS_SETITIMER symbol, which

indicates to the C program that the setitimer() routine is available.

d_setlinebuf (d_setlnbuf.U):

This variable conditionally defines the HAS_SETLINEBUF symbol, which

indicates to the C program that the setlinebuf() routine is available

to change stderr or stdout from block-buffered or unbuffered to a

line-buffered mode.

d_setlocale (d_setlocale.U):

This variable conditionally defines HAS_SETLOCALE if setlocale() is

available to handle locale-specific ctype implementations.

d_setlocale_r (d_setlocale_r.U):

This variable conditionally defines the HAS_SETLOCALE_R symbol,

which indicates to the C program that the setlocale_r()

routine is available.

d_setnent (d_setnent.U):

This variable conditionally defines HAS_SETNETENT if setnetent() is

available.

d_setnetent_r (d_setnetent_r.U):

This variable conditionally defines the HAS_SETNETENT_R symbol,

which indicates to the C program that the setnetent_r()

routine is available.

d_setpent (d_setpent.U):

This variable conditionally defines HAS_SETPROTOENT if setprotoent() is

available.

d_setpgid (d_setpgid.U):

This variable conditionally defines the HAS_SETPGID symbol if the

setpgid(pid, gpid) function is available to set process group ID.

d_setpgrp2 (d_setpgrp2.U):

This variable conditionally defines the HAS_SETPGRP2 symbol, which

indicates to the C program that the setpgrp2() (as in DG/UX) routine

is available to set the current process group.

d_setpgrp (d_setpgrp.U):

This variable conditionally defines HAS_SETPGRP if setpgrp() is

available to set the current process group.

d_setprior (d_setprior.U):

This variable conditionally defines HAS_SETPRIORITY if setpriority()

is available to set a process's priority.

d_setproctitle (d_setproctitle.U):

This variable conditionally defines the HAS_SETPROCTITLE symbol,

which indicates to the C program that the setproctitle() routine

is available.

d_setprotoent_r (d_setprotoent_r.U):

This variable conditionally defines the HAS_SETPROTOENT_R symbol,

which indicates to the C program that the setprotoent_r()

routine is available.

d_setpwent (d_setpwent.U):

This variable conditionally defines the HAS_SETPWENT symbol, which

indicates to the C program that the setpwent() routine is available

for initializing sequential access to the passwd database.

d_setpwent_r (d_setpwent_r.U):

This variable conditionally defines the HAS_SETPWENT_R symbol,

which indicates to the C program that the setpwent_r()

routine is available.

d_setregid (d_setregid.U):

This variable conditionally defines HAS_SETREGID if setregid() is

available to change the real and effective gid of the current

process.

d_setresgid (d_setregid.U):

This variable conditionally defines HAS_SETRESGID if setresgid() is

available to change the real, effective and saved gid of the current

process.

d_setresuid (d_setreuid.U):

This variable conditionally defines HAS_SETREUID if setresuid() is

available to change the real, effective and saved uid of the current

process.

d_setreuid (d_setreuid.U):

This variable conditionally defines HAS_SETREUID if setreuid() is

available to change the real and effective uid of the current

process.

d_setrgid (d_setrgid.U):

This variable conditionally defines the HAS_SETRGID symbol, which

indicates to the C program that the setrgid() routine is available

to change the real gid of the current program.

d_setruid (d_setruid.U):

This variable conditionally defines the HAS_SETRUID symbol, which

indicates to the C program that the setruid() routine is available

to change the real uid of the current program.

d_setsent (d_setsent.U):

This variable conditionally defines HAS_SETSERVENT if setservent() is

available.

d_setservent_r (d_setservent_r.U):

This variable conditionally defines the HAS_SETSERVENT_R symbol,

which indicates to the C program that the setservent_r()

routine is available.

d_setsid (d_setsid.U):

This variable conditionally defines HAS_SETSID if setsid() is

available to set the process group ID.

d_setvbuf (d_setvbuf.U):

This variable conditionally defines the HAS_SETVBUF symbol, which

indicates to the C program that the setvbuf() routine is available

to change buffering on an open stdio stream.

d_sfio (d_sfio.U):

This variable conditionally defines the USE_SFIO symbol,

and indicates whether sfio is available (and should be used).

d_shm (d_shm.U):

This variable conditionally defines the HAS_SHM symbol, which

indicates that the entire shm*(2) library is present.

d_shmat (d_shmat.U):

This variable conditionally defines the HAS_SHMAT symbol, which

indicates to the C program that the shmat() routine is available.

d_shmatprototype (d_shmat.U):

This variable conditionally defines the HAS_SHMAT_PROTOTYPE

symbol, which indicates that sys/shm.h has a prototype for

shmat.

d_shmctl (d_shmctl.U):

This variable conditionally defines the HAS_SHMCTL symbol, which

indicates to the C program that the shmctl() routine is available.

d_shmdt (d_shmdt.U):

This variable conditionally defines the HAS_SHMDT symbol, which

indicates to the C program that the shmdt() routine is available.

d_shmget (d_shmget.U):

This variable conditionally defines the HAS_SHMGET symbol, which

indicates to the C program that the shmget() routine is available.

d_sigaction (d_sigaction.U):

This variable conditionally defines the HAS_SIGACTION symbol, which

indicates that the Vr4 sigaction() routine is available.

d_sigprocmask (d_sigprocmask.U):

This variable conditionally defines HAS_SIGPROCMASK

if sigprocmask() is available to examine or change the signal mask

of the calling process.

d_sigsetjmp (d_sigsetjmp.U):

This variable conditionally defines the HAS_SIGSETJMP symbol,

which indicates that the sigsetjmp() routine is available to

call setjmp() and optionally save the process's signal mask.

d_sockatmark (d_sockatmark.U):

This variable conditionally defines the HAS_SOCKATMARK symbol, which

indicates to the C program that the sockatmark() routine is available.

d_sockatmarkproto (d_sockatmarkproto.U):

This variable conditionally defines the HAS_SOCKATMARK_PROTO symbol,

which indicates to the C program that the system provides

a prototype for the sockatmark() function. Otherwise, it is

up to the program to supply one.

d_socket (d_socket.U):

This variable conditionally defines HAS_SOCKET, which indicates

that the BSD socket interface is supported.

d_socklen_t (d_socklen_t.U):

This symbol will be defined if the C compiler supports socklen_t.

d_sockpair (d_socket.U):

This variable conditionally defines the HAS_SOCKETPAIR symbol, which

indicates that the BSD socketpair() is supported.

d_socks5_init (d_socks5_init.U):

This variable conditionally defines the HAS_SOCKS5_INIT symbol, which

indicates to the C program that the socks5_init() routine is available.

d_sqrtl (d_sqrtl.U):

This variable conditionally defines the HAS_SQRTL symbol, which

indicates to the C program that the sqrtl() routine is available.

d_srand48_r (d_srand48_r.U):

This variable conditionally defines the HAS_SRAND48_R symbol,

which indicates to the C program that the srand48_r()

routine is available.

d_srandom_r (d_srandom_r.U):

This variable conditionally defines the HAS_SRANDOM_R symbol,

which indicates to the C program that the srandom_r()

routine is available.

d_sresgproto (d_sresgproto.U):

This variable conditionally defines the HAS_SETRESGID_PROTO symbol,

which indicates to the C program that the system provides

a prototype for the setresgid() function. Otherwise, it is

up to the program to supply one.

d_sresuproto (d_sresuproto.U):

This variable conditionally defines the HAS_SETRESUID_PROTO symbol,

which indicates to the C program that the system provides

a prototype for the setresuid() function. Otherwise, it is

up to the program to supply one.

d_statblks (d_statblks.U):

This variable conditionally defines USE_STAT_BLOCKS

if this system has a stat structure declaring

st_blksize and st_blocks.

d_statfs_f_flags (d_statfs_f_flags.U):

This variable conditionally defines the HAS_STRUCT_STATFS_F_FLAGS

symbol, which indicates to struct statfs from has f_flags member.

This kind of struct statfs is coming from sys/mount.h (BSD),

not from sys/statfs.h (SYSV).

d_statfs_s (d_statfs_s.U):

This variable conditionally defines the HAS_STRUCT_STATFS symbol,

which indicates that the struct statfs is supported.

d_statvfs (d_statvfs.U):

This variable conditionally defines the HAS_STATVFS symbol, which

indicates to the C program that the statvfs() routine is available.

d_stdio_cnt_lval (d_stdstdio.U):

This variable conditionally defines STDIO_CNT_LVALUE if the

FILE_cnt macro can be used as an lvalue.

d_stdio_ptr_lval (d_stdstdio.U):

This variable conditionally defines STDIO_PTR_LVALUE if the

FILE_ptr macro can be used as an lvalue.

d_stdio_ptr_lval_nochange_cnt (d_stdstdio.U):

This symbol is defined if using the FILE_ptr macro as an lvalue

to increase the pointer by n leaves File_cnt(fp) unchanged.

d_stdio_ptr_lval_sets_cnt (d_stdstdio.U):

This symbol is defined if using the FILE_ptr macro as an lvalue

to increase the pointer by n has the side effect of decreasing the

value of File_cnt(fp) by n.

d_stdio_stream_array (stdio_streams.U):

This variable tells whether there is an array holding

the stdio streams.

d_stdiobase (d_stdstdio.U):

This variable conditionally defines USE_STDIO_BASE if this system

has a FILE structure declaring a usable _base field (or equivalent)

in stdio.h.

d_stdstdio (d_stdstdio.U):

This variable conditionally defines USE_STDIO_PTR if this system

has a FILE structure declaring usable _ptr and _cnt fields (or

equivalent) in stdio.h.

d_strchr (d_strchr.U):

This variable conditionally defines HAS_STRCHR if strchr() and

strrchr() are available for string searching.

d_strcoll (d_strcoll.U):

This variable conditionally defines HAS_STRCOLL if strcoll() is

available to compare strings using collating information.

d_strctcpy (d_strctcpy.U):

This variable conditionally defines the USE_STRUCT_COPY symbol, which

indicates to the C program that this C compiler knows how to copy

structures.

d_strerrm (d_strerror.U):

This variable holds what Strerrr is defined as to translate an error

code condition into an error message string. It could be 'strerror'

or a more complex macro emulating strrror with sys_errlist[], or the

"unknown" string when both strerror and sys_errlist are missing.

d_strerror (d_strerror.U):

This variable conditionally defines HAS_STRERROR if strerror() is

available to translate error numbers to strings.

d_strerror_r (d_strerror_r.U):

This variable conditionally defines the HAS_STRERROR_R symbol,

which indicates to the C program that the strerror_r()

routine is available.

d_strftime (d_strftime.U):

This variable conditionally defines the HAS_STRFTIME symbol, which

indicates to the C program that the strftime() routine is available.

d_strtod (d_strtod.U):

This variable conditionally defines the HAS_STRTOD symbol, which

indicates to the C program that the strtod() routine is available

to provide better numeric string conversion than atof().

d_strtol (d_strtol.U):

This variable conditionally defines the HAS_STRTOL symbol, which

indicates to the C program that the strtol() routine is available

to provide better numeric string conversion than atoi() and friends.

d_strtold (d_strtold.U):

This variable conditionally defines the HAS_STRTOLD symbol, which

indicates to the C program that the strtold() routine is available.

d_strtoll (d_strtoll.U):

This variable conditionally defines the HAS_STRTOLL symbol, which

indicates to the C program that the strtoll() routine is available.

d_strtoq (d_strtoq.U):

This variable conditionally defines the HAS_STRTOQ symbol, which

indicates to the C program that the strtoq() routine is available.

d_strtoul (d_strtoul.U):

This variable conditionally defines the HAS_STRTOUL symbol, which

indicates to the C program that the strtoul() routine is available

to provide conversion of strings to unsigned long.

d_strtoull (d_strtoull.U):

This variable conditionally defines the HAS_STRTOULL symbol, which

indicates to the C program that the strtoull() routine is available.

d_strtouq (d_strtouq.U):

This variable conditionally defines the HAS_STRTOUQ symbol, which

indicates to the C program that the strtouq() routine is available.

d_strxfrm (d_strxfrm.U):

This variable conditionally defines HAS_STRXFRM if strxfrm() is

available to transform strings.

d_suidsafe (d_dosuid.U):

This variable conditionally defines SETUID_SCRIPTS_ARE_SECURE_NOW

if setuid scripts can be secure. This test looks in /dev/fd/.

d_symlink (d_symlink.U):

This variable conditionally defines the HAS_SYMLINK symbol, which

indicates to the C program that the symlink() routine is available

to create symbolic links.

d_syscall (d_syscall.U):

This variable conditionally defines HAS_SYSCALL if syscall() is

available call arbitrary system calls.

d_syscallproto (d_syscallproto.U):

This variable conditionally defines the HAS_SYSCALL_PROTO symbol,

which indicates to the C program that the system provides

a prototype for the syscall() function. Otherwise, it is

up to the program to supply one.

d_sysconf (d_sysconf.U):

This variable conditionally defines the HAS_SYSCONF symbol, which

indicates to the C program that the sysconf() routine is available

to determine system related limits and options.

d_sysernlst (d_strerror.U):

This variable conditionally defines HAS_SYS_ERRNOLIST if sys_errnolist[]

is available to translate error numbers to the symbolic name.

d_syserrlst (d_strerror.U):

This variable conditionally defines HAS_SYS_ERRLIST if sys_errlist[] is

available to translate error numbers to strings.

d_system (d_system.U):

This variable conditionally defines HAS_SYSTEM if system() is

available to issue a shell command.

d_tcgetpgrp (d_tcgtpgrp.U):

This variable conditionally defines the HAS_TCGETPGRP symbol, which

indicates to the C program that the tcgetpgrp() routine is available.

to get foreground process group ID.

d_tcsetpgrp (d_tcstpgrp.U):

This variable conditionally defines the HAS_TCSETPGRP symbol, which

indicates to the C program that the tcsetpgrp() routine is available

to set foreground process group ID.

d_telldir (d_readdir.U):

This variable conditionally defines HAS_TELLDIR if telldir() is

available.

d_telldirproto (d_telldirproto.U):

This variable conditionally defines the HAS_TELLDIR_PROTO symbol,

which indicates to the C program that the system provides

a prototype for the telldir() function. Otherwise, it is

up to the program to supply one.

d_time (d_time.U):

This variable conditionally defines the HAS_TIME symbol, which indicates

that the time() routine exists. The time() routine is normaly

provided on UNIX systems.

d_times (d_times.U):

This variable conditionally defines the HAS_TIMES symbol, which indicates

that the times() routine exists. The times() routine is normaly

provided on UNIX systems. You may have to include <sys/times.h>.

d_tm_tm_gmtoff (i_time.U):

This variable conditionally defines HAS_TM_TM_GMTOFF, which indicates

indicates to the C program that the struct tm has the tm_gmtoff field.

d_tm_tm_zone (i_time.U):

This variable conditionally defines HAS_TM_TM_ZONE, which indicates

indicates to the C program that the struct tm has the tm_zone field.

d_tmpnam_r (d_tmpnam_r.U):

This variable conditionally defines the HAS_TMPNAM_R symbol,

which indicates to the C program that the tmpnam_r()

routine is available.

d_truncate (d_truncate.U):

This variable conditionally defines HAS_TRUNCATE if truncate() is

available to truncate files.

d_ttyname_r (d_ttyname_r.U):

This variable conditionally defines the HAS_TTYNAME_R symbol,

which indicates to the C program that the ttyname_r()

routine is available.

d_tzname (d_tzname.U):

This variable conditionally defines HAS_TZNAME if tzname[] is

available to access timezone names.

d_u32align (d_u32align.U):

This variable tells whether you must access character data

through U32-aligned pointers.

d_ualarm (d_ualarm.U):

This variable conditionally defines the HAS_UALARM symbol, which

indicates to the C program that the ualarm() routine is available.

d_umask (d_umask.U):

This variable conditionally defines the HAS_UMASK symbol, which

indicates to the C program that the umask() routine is available.

to set and get the value of the file creation mask.

d_uname (d_gethname.U):

This variable conditionally defines the HAS_UNAME symbol, which

indicates to the C program that the uname() routine may be

used to derive the host name.

d_union_semun (d_union_semun.U):

This variable conditionally defines HAS_UNION_SEMUN if the

union semun is defined by including <sys/sem.h>.

d_unordered (d_unordered.U):

This variable conditionally defines the HAS_UNORDERED symbol, which

indicates to the C program that the unordered() routine is available.

d_usleep (d_usleep.U):

This variable conditionally defines HAS_USLEEP if usleep() is

available to do high granularity sleeps.

d_usleepproto (d_usleepproto.U):

This variable conditionally defines the HAS_USLEEP_PROTO symbol,

which indicates to the C program that the system provides

a prototype for the usleep() function. Otherwise, it is

up to the program to supply one.

d_ustat (d_ustat.U):

This variable conditionally defines HAS_USTAT if ustat() is

available to query file system statistics by dev_t.

d_vendorarch (vendorarch.U):

This variable conditionally defined PERL_VENDORARCH.

d_vendorbin (vendorbin.U):

This variable conditionally defines PERL_VENDORBIN.

d_vendorlib (vendorlib.U):

This variable conditionally defines PERL_VENDORLIB.

d_vendorscript (vendorscript.U):

This variable conditionally defines PERL_VENDORSCRIPT.

d_vfork (d_vfork.U):

This variable conditionally defines the HAS_VFORK symbol, which

indicates the vfork() routine is available.

d_void_closedir (d_closedir.U):

This variable conditionally defines VOID_CLOSEDIR if closedir()

does not return a value.

d_voidsig (d_voidsig.U):

This variable conditionally defines VOIDSIG if this system

declares "void (*signal(...))()" in signal.h. The old way was to

declare it as "int (*signal(...))()".

d_voidtty (i_sysioctl.U):

This variable conditionally defines USE_IOCNOTTY to indicate that the

ioctl() call with TIOCNOTTY should be used to void tty association.

Otherwise (on USG probably), it is enough to close the standard file

decriptors and do a setpgrp().

d_volatile (d_volatile.U):

This variable conditionally defines the HASVOLATILE symbol, which

indicates to the C program that this C compiler knows about the

volatile declaration.

d_vprintf (d_vprintf.U):

This variable conditionally defines the HAS_VPRINTF symbol, which

indicates to the C program that the vprintf() routine is available

to printf with a pointer to an argument list.

d_wait4 (d_wait4.U):

This variable conditionally defines the HAS_WAIT4 symbol, which

indicates the wait4() routine is available.

d_waitpid (d_waitpid.U):

This variable conditionally defines HAS_WAITPID if waitpid() is

available to wait for child process.

d_wcstombs (d_wcstombs.U):

This variable conditionally defines the HAS_WCSTOMBS symbol, which

indicates to the C program that the wcstombs() routine is available

to convert wide character strings to multibyte strings.

d_wctomb (d_wctomb.U):

This variable conditionally defines the HAS_WCTOMB symbol, which

indicates to the C program that the wctomb() routine is available

to convert a wide character to a multibyte.

d_writev (d_writev.U):

This variable conditionally defines the HAS_WRITEV symbol, which

indicates to the C program that the writev() routine is available.

d_xenix (Guess.U):

This variable conditionally defines the symbol XENIX, which alerts

the C program that it runs under Xenix.

date (Loc.U):

This variable is used internally by Configure to determine the

full pathname (if any) of the date program. After Configure runs,

the value is reset to a plain "date" and is not useful.

db_hashtype (i_db.U):

This variable contains the type of the hash structure element

in the <db.h> header file. In older versions of DB, it was

int, while in newer ones it is u_int32_t.

db_prefixtype (i_db.U):

This variable contains the type of the prefix structure element

in the <db.h> header file. In older versions of DB, it was

int, while in newer ones it is size_t.

db_version_major (i_db.U):

This variable contains the major version number of

Berkeley DB found in the <db.h> header file.

db_version_minor (i_db.U):

This variable contains the minor version number of

Berkeley DB found in the <db.h> header file.

For DB version 1 this is always 0.

db_version_patch (i_db.U):

This variable contains the patch version number of

Berkeley DB found in the <db.h> header file.

For DB version 1 this is always 0.

defvoidused (voidflags.U):

This variable contains the default value of the VOIDUSED symbol (15).

direntrytype (i_dirent.U):

This symbol is set to 'struct direct' or 'struct dirent' depending on

whether dirent is available or not. You should use this pseudo type to

portably declare your directory entries.

dlext (dlext.U):

This variable contains the extension that is to be used for the

dynamically loaded modules that perl generaties.

dlsrc (dlsrc.U):

This variable contains the name of the dynamic loading file that

will be used with the package.

doublesize (doublesize.U):

This variable contains the value of the DOUBLESIZE symbol, which

indicates to the C program how many bytes there are in a double.

drand01 (randfunc.U):

Indicates the macro to be used to generate normalized

random numbers. Uses randfunc, often divided by

(double) (((unsigned long) 1 << randbits)) in order to

normalize the result.

In C programs, the macro 'Drand01' is mapped to drand01.

drand48_r_proto (d_drand48_r.U):

This variable encodes the prototype of drand48_r.

It is zero if d_drand48_r is undef, and one of the

REENTRANT_PROTO_T_ABC macros of reentr.h if d_drand48_r

is defined.

dynamic_ext (Extensions.U):

This variable holds a list of XS extension files we want to

link dynamically into the package. It is used by Makefile.

eagain (nblock_io.U):

This variable bears the symbolic errno code set by read() when no

data is present on the file and non-blocking I/O was enabled (otherwise,

read() blocks naturally).

ebcdic (ebcdic.U):

This variable conditionally defines EBCDIC if this

system uses EBCDIC encoding. Among other things, this

means that the character ranges are not contiguous.

See trnl.U

echo (Loc.U):

This variable is used internally by Configure to determine the

full pathname (if any) of the echo program. After Configure runs,

the value is reset to a plain "echo" and is not useful.

egrep (Loc.U):

This variable is used internally by Configure to determine the

full pathname (if any) of the egrep program. After Configure runs,

the value is reset to a plain "egrep" and is not useful.

emacs (Loc.U):

This variable is defined but not used by Configure.

The value is a plain '' and is not useful.

endgrent_r_proto (d_endgrent_r.U):

This variable encodes the prototype of endgrent_r.

It is zero if d_endgrent_r is undef, and one of the

REENTRANT_PROTO_T_ABC macros of reentr.h if d_endgrent_r

is defined.

endhostent_r_proto (d_endhostent_r.U):

This variable encodes the prototype of endhostent_r.

It is zero if d_endhostent_r is undef, and one of the

REENTRANT_PROTO_T_ABC macros of reentr.h if d_endhostent_r

is defined.

endnetent_r_proto (d_endnetent_r.U):

This variable encodes the prototype of endnetent_r.

It is zero if d_endnetent_r is undef, and one of the

REENTRANT_PROTO_T_ABC macros of reentr.h if d_endnetent_r

is defined.

endprotoent_r_proto (d_endprotoent_r.U):

This variable encodes the prototype of endprotoent_r.

It is zero if d_endprotoent_r is undef, and one of the

REENTRANT_PROTO_T_ABC macros of reentr.h if d_endprotoent_r

is defined.

endpwent_r_proto (d_endpwent_r.U):

This variable encodes the prototype of endpwent_r.

It is zero if d_endpwent_r is undef, and one of the

REENTRANT_PROTO_T_ABC macros of reentr.h if d_endpwent_r

is defined.

endservent_r_proto (d_endservent_r.U):

This variable encodes the prototype of endservent_r.

It is zero if d_endservent_r is undef, and one of the

REENTRANT_PROTO_T_ABC macros of reentr.h if d_endservent_r

is defined.

eunicefix (Init.U):

When running under Eunice this variable contains a command which will

convert a shell script to the proper form of text file for it to be

executable by the shell. On other systems it is a no-op.

exe_ext (Unix.U):

This is an old synonym for _exe.

expr (Loc.U):

This variable is used internally by Configure to determine the

full pathname (if any) of the expr program. After Configure runs,

the value is reset to a plain "expr" and is not useful.

extensions (Extensions.U):

This variable holds a list of all extension files (both XS and

non-xs linked into the package. It is propagated to Config.pm

and is typically used to test whether a particular extesion

is available.

extras (Extras.U):

This variable holds a list of extra modules to install.

fflushall (fflushall.U):

This symbol, if defined, tells that to flush

all pending stdio output one must loop through all

the stdio file handles stored in an array and fflush them.

Note that if fflushNULL is defined, fflushall will not

even be probed for and will be left undefined.

fflushNULL (fflushall.U):

This symbol, if defined, tells that fflush(NULL) does flush

all pending stdio output.

find (Loc.U):

This variable is defined but not used by Configure.

The value is a plain '' and is not useful.

firstmakefile (Unix.U):

This variable defines the first file searched by make. On unix,

it is makefile (then Makefile). On case-insensitive systems,

it might be something else. This is only used to deal with

convoluted make depend tricks.

flex (Loc.U):

This variable is defined but not used by Configure.

The value is a plain '' and is not useful.

fpossize (fpossize.U):

This variable contains the size of a fpostype in bytes.

fpostype (fpostype.U):

This variable defines Fpos_t to be something like fpos_t, long,

uint, or whatever type is used to declare file positions in libc.

freetype (mallocsrc.U):

This variable contains the return type of free(). It is usually

void, but occasionally int.

from (Cross.U):

This variable contains the command used by Configure

to copy files from the target host. Useful and available

only during Perl build.

The string ':' if not cross-compiling.

full_ar (Loc_ar.U):

This variable contains the full pathname to 'ar', whether or

not the user has specified 'portability'. This is only used

in the Makefile.SH.

full_csh (d_csh.U):

This variable contains the full pathname to 'csh', whether or

not the user has specified 'portability'. This is only used

in the compiled C program, and we assume that all systems which

can share this executable will have the same full pathname to

'csh.'

full_sed (Loc_sed.U):

This variable contains the full pathname to 'sed', whether or

not the user has specified 'portability'. This is only used

in the compiled C program, and we assume that all systems which

can share this executable will have the same full pathname to

'sed.'

gccansipedantic (gccvers.U):

If GNU cc (gcc) is used, this variable will enable (if set) the

-ansi and -pedantic ccflags for building core files (through

cflags script). (See Porting/pumpkin.pod for full description).

gccosandvers (gccvers.U):

If GNU cc (gcc) is used, this variable holds the operating system

and version used to compile gcc. It is set to '' if not gcc,

or if nothing useful can be parsed as the os version.

gccversion (gccvers.U):

If GNU cc (gcc) is used, this variable holds '1' or '2' to

indicate whether the compiler is version 1 or 2. This is used in

setting some of the default cflags. It is set to '' if not gcc.

getgrent_r_proto (d_getgrent_r.U):

This variable encodes the prototype of getgrent_r.

It is zero if d_getgrent_r is undef, and one of the

REENTRANT_PROTO_T_ABC macros of reentr.h if d_getgrent_r

is defined.

getgrgid_r_proto (d_getgrgid_r.U):

This variable encodes the prototype of getgrgid_r.

It is zero if d_getgrgid_r is undef, and one of the

REENTRANT_PROTO_T_ABC macros of reentr.h if d_getgrgid_r

is defined.

getgrnam_r_proto (d_getgrnam_r.U):

This variable encodes the prototype of getgrnam_r.

It is zero if d_getgrnam_r is undef, and one of the

REENTRANT_PROTO_T_ABC macros of reentr.h if d_getgrnam_r

is defined.

gethostbyaddr_r_proto (d_gethostbyaddr_r.U):

This variable encodes the prototype of gethostbyaddr_r.

It is zero if d_gethostbyaddr_r is undef, and one of the

REENTRANT_PROTO_T_ABC macros of reentr.h if d_gethostbyaddr_r

is defined.

gethostbyname_r_proto (d_gethostbyname_r.U):

This variable encodes the prototype of gethostbyname_r.

It is zero if d_gethostbyname_r is undef, and one of the

REENTRANT_PROTO_T_ABC macros of reentr.h if d_gethostbyname_r

is defined.

gethostent_r_proto (d_gethostent_r.U):

This variable encodes the prototype of gethostent_r.

It is zero if d_gethostent_r is undef, and one of the

REENTRANT_PROTO_T_ABC macros of reentr.h if d_gethostent_r

is defined.

getlogin_r_proto (d_getlogin_r.U):

This variable encodes the prototype of getlogin_r.

It is zero if d_getlogin_r is undef, and one of the

REENTRANT_PROTO_T_ABC macros of reentr.h if d_getlogin_r

is defined.

getnetbyaddr_r_proto (d_getnetbyaddr_r.U):

This variable encodes the prototype of getnetbyaddr_r.

It is zero if d_getnetbyaddr_r is undef, and one of the

REENTRANT_PROTO_T_ABC macros of reentr.h if d_getnetbyaddr_r

is defined.

getnetbyname_r_proto (d_getnetbyname_r.U):

This variable encodes the prototype of getnetbyname_r.

It is zero if d_getnetbyname_r is undef, and one of the

REENTRANT_PROTO_T_ABC macros of reentr.h if d_getnetbyname_r

is defined.

getnetent_r_proto (d_getnetent_r.U):

This variable encodes the prototype of getnetent_r.

It is zero if d_getnetent_r is undef, and one of the

REENTRANT_PROTO_T_ABC macros of reentr.h if d_getnetent_r

is defined.

getprotobyname_r_proto (d_getprotobyname_r.U):

This variable encodes the prototype of getprotobyname_r.

It is zero if d_getprotobyname_r is undef, and one of the

REENTRANT_PROTO_T_ABC macros of reentr.h if d_getprotobyname_r

is defined.

getprotobynumber_r_proto (d_getprotobynumber_r.U):

This variable encodes the prototype of getprotobynumber_r.

It is zero if d_getprotobynumber_r is undef, and one of the

REENTRANT_PROTO_T_ABC macros of reentr.h if d_getprotobynumber_r

is defined.

getprotoent_r_proto (d_getprotoent_r.U):

This variable encodes the prototype of getprotoent_r.

It is zero if d_getprotoent_r is undef, and one of the

REENTRANT_PROTO_T_ABC macros of reentr.h if d_getprotoent_r

is defined.

getpwent_r_proto (d_getpwent_r.U):

This variable encodes the prototype of getpwent_r.

It is zero if d_getpwent_r is undef, and one of the

REENTRANT_PROTO_T_ABC macros of reentr.h if d_getpwent_r

is defined.

getpwnam_r_proto (d_getpwnam_r.U):

This variable encodes the prototype of getpwnam_r.

It is zero if d_getpwnam_r is undef, and one of the

REENTRANT_PROTO_T_ABC macros of reentr.h if d_getpwnam_r

is defined.

getpwuid_r_proto (d_getpwuid_r.U):

This variable encodes the prototype of getpwuid_r.

It is zero if d_getpwuid_r is undef, and one of the

REENTRANT_PROTO_T_ABC macros of reentr.h if d_getpwuid_r

is defined.

getservbyname_r_proto (d_getservbyname_r.U):

This variable encodes the prototype of getservbyname_r.

It is zero if d_getservbyname_r is undef, and one of the

REENTRANT_PROTO_T_ABC macros of reentr.h if d_getservbyname_r

is defined.

getservbyport_r_proto (d_getservbyport_r.U):

This variable encodes the prototype of getservbyport_r.

It is zero if d_getservbyport_r is undef, and one of the

REENTRANT_PROTO_T_ABC macros of reentr.h if d_getservbyport_r

is defined.

getservent_r_proto (d_getservent_r.U):

This variable encodes the prototype of getservent_r.

It is zero if d_getservent_r is undef, and one of the

REENTRANT_PROTO_T_ABC macros of reentr.h if d_getservent_r

is defined.

getspnam_r_proto (d_getspnam_r.U):

This variable encodes the prototype of getspnam_r.

It is zero if d_getspnam_r is undef, and one of the

REENTRANT_PROTO_T_ABC macros of reentr.h if d_getspnam_r

is defined.

gidformat (gidf.U):

This variable contains the format string used for printing a Gid_t.

gidsign (gidsign.U):

This variable contains the signedness of a gidtype.

1 for unsigned, -1 for signed.

gidsize (gidsize.U):

This variable contains the size of a gidtype in bytes.

gidtype (gidtype.U):

This variable defines Gid_t to be something like gid_t, int,

ushort, or whatever type is used to declare the return type

of getgid(). Typically, it is the type of group ids in the kernel.

glibpth (libpth.U):

This variable holds the general path (space-separated) used to

find libraries. It may contain directories that do not exist on

this platform, libpth is the cleaned-up version.

gmake (Loc.U):

This variable is used internally by Configure to determine the

full pathname (if any) of the gmake program. After Configure runs,

the value is reset to a plain "gmake" and is not useful.

gmtime_r_proto (d_gmtime_r.U):

This variable encodes the prototype of gmtime_r.

It is zero if d_gmtime_r is undef, and one of the

REENTRANT_PROTO_T_ABC macros of reentr.h if d_gmtime_r

is defined.

gnulibc_version (d_gnulibc.U):

This variable contains the version number of the GNU C library.

It is usually something like '2.2.5'. It is a plain '' if this

is not the GNU C library, or if the version is unknown.

grep (Loc.U):

This variable is used internally by Configure to determine the

full pathname (if any) of the grep program. After Configure runs,

the value is reset to a plain "grep" and is not useful.

groupcat (nis.U):

This variable contains a command that produces the text of the

/etc/group file. This is normally "cat /etc/group", but can be

"ypcat group" when NIS is used.

On some systems, such as os390, there may be no equivalent

command, in which case this variable is unset.

groupstype (groupstype.U):

This variable defines Groups_t to be something like gid_t, int,

ushort, or whatever type is used for the second argument to

getgroups() and setgroups(). Usually, this is the same as

gidtype (gid_t), but sometimes it isn't.

gzip (Loc.U):

This variable is used internally by Configure to determine the

full pathname (if any) of the gzip program. After Configure runs,

the value is reset to a plain "gzip" and is not useful.

h_fcntl (h_fcntl.U):

This is variable gets set in various places to tell i_fcntl that

<fcntl.h> should be included.

h_sysfile (h_sysfile.U):

This is variable gets set in various places to tell i_sys_file that

<sys/file.h> should be included.

hint (Oldconfig.U):

Gives the type of hints used for previous answers. May be one of

"default", "recommended" or "previous".

hostcat (nis.U):

This variable contains a command that produces the text of the

/etc/hosts file. This is normally "cat /etc/hosts", but can be

"ypcat hosts" when NIS is used.

On some systems, such as os390, there may be no equivalent

command, in which case this variable is unset.

html1dir (html1dir.U):

This variable contains the name of the directory in which html

source pages are to be put. This directory is for pages

that describe whole programs, not libraries or modules. It

is intended to correspond roughly to section 1 of the Unix

manuals.

html1direxp (html1dir.U):

This variable is the same as the html1dir variable, but is filename

expanded at configuration time, for convenient use in makefiles.

html3dir (html3dir.U):

This variable contains the name of the directory in which html

source pages are to be put. This directory is for pages

that describe libraries or modules. It is intended to

correspond roughly to section 3 of the Unix manuals.

html3direxp (html3dir.U):

This variable is the same as the html3dir variable, but is filename

expanded at configuration time, for convenient use in makefiles.

i16size (perlxv.U):

This variable is the size of an I16 in bytes.

i16type (perlxv.U):

This variable contains the C type used for Perl's I16.

i32size (perlxv.U):

This variable is the size of an I32 in bytes.

i32type (perlxv.U):

This variable contains the C type used for Perl's I32.

i64size (perlxv.U):

This variable is the size of an I64 in bytes.

i64type (perlxv.U):

This variable contains the C type used for Perl's I64.

i8size (perlxv.U):

This variable is the size of an I8 in bytes.

i8type (perlxv.U):

This variable contains the C type used for Perl's I8.

i_arpainet (i_arpainet.U):

This variable conditionally defines the I_ARPA_INET symbol,

and indicates whether a C program should include <arpa/inet.h>.

i_bsdioctl (i_sysioctl.U):

This variable conditionally defines the I_SYS_BSDIOCTL symbol, which

indicates to the C program that <sys/bsdioctl.h> exists and should

be included.

i_crypt (i_crypt.U):

This variable conditionally defines the I_CRYPT symbol, and indicates

whether a C program should include <crypt.h>.

i_db (i_db.U):

This variable conditionally defines the I_DB symbol, and indicates

whether a C program may include Berkeley's DB include file <db.h>.

i_dbm (i_dbm.U):

This variable conditionally defines the I_DBM symbol, which

indicates to the C program that <dbm.h> exists and should

be included.

i_dirent (i_dirent.U):

This variable conditionally defines I_DIRENT, which indicates

to the C program that it should include <dirent.h>.

i_dld (i_dld.U):

This variable conditionally defines the I_DLD symbol, which

indicates to the C program that <dld.h> (GNU dynamic loading)

exists and should be included.

i_dlfcn (i_dlfcn.U):

This variable conditionally defines the I_DLFCN symbol, which

indicates to the C program that <dlfcn.h> exists and should

be included.

i_fcntl (i_fcntl.U):

This variable controls the value of I_FCNTL (which tells

the C program to include <fcntl.h>).

i_float (i_float.U):

This variable conditionally defines the I_FLOAT symbol, and indicates

whether a C program may include <float.h> to get symbols like DBL_MAX

or DBL_MIN, i.e. machine dependent floating point values.

i_fp (i_fp.U):

This variable conditionally defines the I_FP symbol, and indicates

whether a C program should include <fp.h>.

i_fp_class (i_fp_class.U):

This variable conditionally defines the I_FP_CLASS symbol, and indicates

whether a C program should include <fp_class.h>.

i_gdbm (i_gdbm.U):

This variable conditionally defines the I_GDBM symbol, which

indicates to the C program that <gdbm.h> exists and should

be included.

i_grp (i_grp.U):

This variable conditionally defines the I_GRP symbol, and indicates

whether a C program should include <grp.h>.

i_ieeefp (i_ieeefp.U):

This variable conditionally defines the I_IEEEFP symbol, and indicates

whether a C program should include <ieeefp.h>.

i_inttypes (i_inttypes.U):

This variable conditionally defines the I_INTTYPES symbol,

and indicates whether a C program should include <inttypes.h>.

i_langinfo (i_langinfo.U):

This variable conditionally defines the I_LANGINFO symbol,

and indicates whether a C program should include <langinfo.h>.

i_libutil (i_libutil.U):

This variable conditionally defines the I_LIBUTIL symbol, and indicates

whether a C program should include <libutil.h>.

i_limits (i_limits.U):

This variable conditionally defines the I_LIMITS symbol, and indicates

whether a C program may include <limits.h> to get symbols like WORD_BIT

and friends.

i_locale (i_locale.U):

This variable conditionally defines the I_LOCALE symbol,

and indicates whether a C program should include <locale.h>.

i_machcthr (i_machcthr.U):

This variable conditionally defines the I_MACH_CTHREADS symbol,

and indicates whether a C program should include <mach/cthreads.h>.

i_malloc (i_malloc.U):

This variable conditionally defines the I_MALLOC symbol, and indicates

whether a C program should include <malloc.h>.

i_math (i_math.U):

This variable conditionally defines the I_MATH symbol, and indicates

whether a C program may include <math.h>.

i_memory (i_memory.U):

This variable conditionally defines the I_MEMORY symbol, and indicates

whether a C program should include <memory.h>.

i_mntent (i_mntent.U):

This variable conditionally defines the I_MNTENT symbol, and indicates

whether a C program should include <mntent.h>.

i_ndbm (i_ndbm.U):

This variable conditionally defines the I_NDBM symbol, which

indicates to the C program that <ndbm.h> exists and should

be included.

i_netdb (i_netdb.U):

This variable conditionally defines the I_NETDB symbol, and indicates

whether a C program should include <netdb.h>.

i_neterrno (i_neterrno.U):

This variable conditionally defines the I_NET_ERRNO symbol, which

indicates to the C program that <net/errno.h> exists and should

be included.

i_netinettcp (i_netinettcp.U):

This variable conditionally defines the I_NETINET_TCP symbol,

and indicates whether a C program should include <netinet/tcp.h>.

i_niin (i_niin.U):

This variable conditionally defines I_NETINET_IN, which indicates

to the C program that it should include <netinet/in.h>. Otherwise,

you may try <sys/in.h>.

i_poll (i_poll.U):

This variable conditionally defines the I_POLL symbol, and indicates

whether a C program should include <poll.h>.

i_prot (i_prot.U):

This variable conditionally defines the I_PROT symbol, and indicates

whether a C program should include <prot.h>.

i_pthread (i_pthread.U):

This variable conditionally defines the I_PTHREAD symbol,

and indicates whether a C program should include <pthread.h>.

i_pwd (i_pwd.U):

This variable conditionally defines I_PWD, which indicates

to the C program that it should include <pwd.h>.

i_rpcsvcdbm (i_dbm.U):

This variable conditionally defines the I_RPCSVC_DBM symbol, which

indicates to the C program that <rpcsvc/dbm.h> exists and should

be included. Some System V systems might need this instead of <dbm.h>.

i_sfio (i_sfio.U):

This variable conditionally defines the I_SFIO symbol,

and indicates whether a C program should include <sfio.h>.

i_sgtty (i_termio.U):

This variable conditionally defines the I_SGTTY symbol, which

indicates to the C program that it should include <sgtty.h> rather

than <termio.h>.

i_shadow (i_shadow.U):

This variable conditionally defines the I_SHADOW symbol, and indicates

whether a C program should include <shadow.h>.

i_socks (i_socks.U):

This variable conditionally defines the I_SOCKS symbol, and indicates

whether a C program should include <socks.h>.

i_stdarg (i_varhdr.U):

This variable conditionally defines the I_STDARG symbol, which

indicates to the C program that <stdarg.h> exists and should

be included.

i_stddef (i_stddef.U):

This variable conditionally defines the I_STDDEF symbol, which

indicates to the C program that <stddef.h> exists and should

be included.

i_stdlib (i_stdlib.U):

This variable conditionally defines the I_STDLIB symbol, which

indicates to the C program that <stdlib.h> exists and should

be included.

i_string (i_string.U):

This variable conditionally defines the I_STRING symbol, which

indicates that <string.h> should be included rather than <strings.h>.

i_sunmath (i_sunmath.U):

This variable conditionally defines the I_SUNMATH symbol, and indicates

whether a C program should include <sunmath.h>.

i_sysaccess (i_sysaccess.U):

This variable conditionally defines the I_SYS_ACCESS symbol,

and indicates whether a C program should include <sys/access.h>.

i_sysdir (i_sysdir.U):

This variable conditionally defines the I_SYS_DIR symbol, and indicates

whether a C program should include <sys/dir.h>.

i_sysfile (i_sysfile.U):

This variable conditionally defines the I_SYS_FILE symbol, and indicates

whether a C program should include <sys/file.h> to get R_OK and friends.

i_sysfilio (i_sysioctl.U):

This variable conditionally defines the I_SYS_FILIO symbol, which

indicates to the C program that <sys/filio.h> exists and should

be included in preference to <sys/ioctl.h>.

i_sysin (i_niin.U):

This variable conditionally defines I_SYS_IN, which indicates

to the C program that it should include <sys/in.h> instead of

<netinet/in.h>.

i_sysioctl (i_sysioctl.U):

This variable conditionally defines the I_SYS_IOCTL symbol, which

indicates to the C program that <sys/ioctl.h> exists and should

be included.

i_syslog (i_syslog.U):

This variable conditionally defines the I_SYSLOG symbol,

and indicates whether a C program should include <syslog.h>.

i_sysmman (i_sysmman.U):

This variable conditionally defines the I_SYS_MMAN symbol, and

indicates whether a C program should include <sys/mman.h>.

i_sysmode (i_sysmode.U):

This variable conditionally defines the I_SYSMODE symbol,

and indicates whether a C program should include <sys/mode.h>.

i_sysmount (i_sysmount.U):

This variable conditionally defines the I_SYSMOUNT symbol,

and indicates whether a C program should include <sys/mount.h>.

i_sysndir (i_sysndir.U):

This variable conditionally defines the I_SYS_NDIR symbol, and indicates

whether a C program should include <sys/ndir.h>.

i_sysparam (i_sysparam.U):

This variable conditionally defines the I_SYS_PARAM symbol, and indicates

whether a C program should include <sys/param.h>.

i_sysresrc (i_sysresrc.U):

This variable conditionally defines the I_SYS_RESOURCE symbol,

and indicates whether a C program should include <sys/resource.h>.

i_syssecrt (i_syssecrt.U):

This variable conditionally defines the I_SYS_SECURITY symbol,

and indicates whether a C program should include <sys/security.h>.

i_sysselct (i_sysselct.U):

This variable conditionally defines I_SYS_SELECT, which indicates

to the C program that it should include <sys/select.h> in order to

get the definition of struct timeval.

i_syssockio (i_sysioctl.U):

This variable conditionally defines I_SYS_SOCKIO to indicate to the

C program that socket ioctl codes may be found in <sys/sockio.h>

instead of <sys/ioctl.h>.

i_sysstat (i_sysstat.U):

This variable conditionally defines the I_SYS_STAT symbol,

and indicates whether a C program should include <sys/stat.h>.

i_sysstatfs (i_sysstatfs.U):

This variable conditionally defines the I_SYSSTATFS symbol,

and indicates whether a C program should include <sys/statfs.h>.

i_sysstatvfs (i_sysstatvfs.U):

This variable conditionally defines the I_SYSSTATVFS symbol,

and indicates whether a C program should include <sys/statvfs.h>.

i_systime (i_time.U):

This variable conditionally defines I_SYS_TIME, which indicates

to the C program that it should include <sys/time.h>.

i_systimek (i_time.U):

This variable conditionally defines I_SYS_TIME_KERNEL, which

indicates to the C program that it should include <sys/time.h>

with KERNEL defined.

i_systimes (i_systimes.U):

This variable conditionally defines the I_SYS_TIMES symbol, and indicates

whether a C program should include <sys/times.h>.

i_systypes (i_systypes.U):

This variable conditionally defines the I_SYS_TYPES symbol,

and indicates whether a C program should include <sys/types.h>.

i_sysuio (i_sysuio.U):

This variable conditionally defines the I_SYSUIO symbol, and indicates

whether a C program should include <sys/uio.h>.

i_sysun (i_sysun.U):

This variable conditionally defines I_SYS_UN, which indicates

to the C program that it should include <sys/un.h> to get UNIX

domain socket definitions.

i_sysutsname (i_sysutsname.U):

This variable conditionally defines the I_SYSUTSNAME symbol,

and indicates whether a C program should include <sys/utsname.h>.

i_sysvfs (i_sysvfs.U):

This variable conditionally defines the I_SYSVFS symbol,

and indicates whether a C program should include <sys/vfs.h>.

i_syswait (i_syswait.U):

This variable conditionally defines I_SYS_WAIT, which indicates

to the C program that it should include <sys/wait.h>.

i_termio (i_termio.U):

This variable conditionally defines the I_TERMIO symbol, which

indicates to the C program that it should include <termio.h> rather

than <sgtty.h>.

i_termios (i_termio.U):

This variable conditionally defines the I_TERMIOS symbol, which

indicates to the C program that the POSIX <termios.h> file is

to be included.

i_time (i_time.U):

This variable conditionally defines I_TIME, which indicates

to the C program that it should include <time.h>.

i_unistd (i_unistd.U):

This variable conditionally defines the I_UNISTD symbol, and indicates

whether a C program should include <unistd.h>.

i_ustat (i_ustat.U):

This variable conditionally defines the I_USTAT symbol, and indicates

whether a C program should include <ustat.h>.

i_utime (i_utime.U):

This variable conditionally defines the I_UTIME symbol, and indicates

whether a C program should include <utime.h>.

i_values (i_values.U):

This variable conditionally defines the I_VALUES symbol, and indicates

whether a C program may include <values.h> to get symbols like MAXLONG

and friends.

i_varargs (i_varhdr.U):

This variable conditionally defines I_VARARGS, which indicates

to the C program that it should include <varargs.h>.

i_varhdr (i_varhdr.U):

Contains the name of the header to be included to get va_dcl definition.

Typically one of varargs.h or stdarg.h.

i_vfork (i_vfork.U):

This variable conditionally defines the I_VFORK symbol, and indicates

whether a C program should include vfork.h.

ignore_versioned_solibs (libs.U):

This variable should be non-empty if non-versioned shared

libraries (libfoo.so.x.y) are to be ignored (because they

cannot be linked against).

inc_version_list (inc_version_list.U):

This variable specifies the list of subdirectories in over

which perl.c:incpush() and lib/lib.pm will automatically

search when adding directories to @INC. The elements in

the list are separated by spaces. This is only useful

if you have a perl library directory tree structured like the

default one. See INSTALL for how this works. The versioned

site_perl directory was introduced in 5.005, so that is the

lowest possible value.

inc_version_list_init (inc_version_list.U):

This variable holds the same list as inc_version_list, but

each item is enclosed in double quotes and separated by commas,

suitable for use in the PERL_INC_VERSION_LIST initialization.

incpath (usrinc.U):

This variable must preceed the normal include path to get hte

right one, as in "$incpath/usr/include" or "$incpath/usr/lib".

Value can be "" or "/bsd43" on mips.

inews (Loc.U):

This variable is defined but not used by Configure.

The value is a plain '' and is not useful.

installarchlib (archlib.U):

This variable is really the same as archlibexp but may differ on

those systems using AFS. For extra portability, only this variable

should be used in makefiles.

installbin (bin.U):

This variable is the same as binexp unless AFS is running in which case

the user is explicitely prompted for it. This variable should always

be used in your makefiles for maximum portability.

installhtml1dir (html1dir.U):

This variable is really the same as html1direxp, unless you are

using a different installprefix. For extra portability, you

should only use this variable within your makefiles.

installhtml3dir (html3dir.U):

This variable is really the same as html3direxp, unless you are

using a different installprefix. For extra portability, you

should only use this variable within your makefiles.

installman1dir (man1dir.U):

This variable is really the same as man1direxp, unless you are using

AFS in which case it points to the read/write location whereas

man1direxp only points to the read-only access location. For extra

portability, you should only use this variable within your makefiles.

installman3dir (man3dir.U):

This variable is really the same as man3direxp, unless you are using

AFS in which case it points to the read/write location whereas

man3direxp only points to the read-only access location. For extra

portability, you should only use this variable within your makefiles.

installprefix (installprefix.U):

This variable holds the name of the directory below which

"make install" will install the package. For most users, this

is the same as prefix. However, it is useful for

installing the software into a different (usually temporary)

location after which it can be bundled up and moved somehow

to the final location specified by prefix.

installprefixexp (installprefix.U):

This variable holds the full absolute path of installprefix

with all ~-expansion done.

installprivlib (privlib.U):

This variable is really the same as privlibexp but may differ on

those systems using AFS. For extra portability, only this variable

should be used in makefiles.

installscript (scriptdir.U):

This variable is usually the same as scriptdirexp, unless you are on

a system running AFS, in which case they may differ slightly. You

should always use this variable within your makefiles for portability.

installsitearch (sitearch.U):

This variable is really the same as sitearchexp but may differ on

those systems using AFS. For extra portability, only this variable

should be used in makefiles.

installsitebin (sitebin.U):

This variable is usually the same as sitebinexp, unless you are on

a system running AFS, in which case they may differ slightly. You

should always use this variable within your makefiles for portability.

installsitehtml1dir (sitehtml1dir.U):

This variable is really the same as sitehtml1direxp, unless you are using

AFS in which case it points to the read/write location whereas

html1direxp only points to the read-only access location. For extra

portability, you should only use this variable within your makefiles.

installsitehtml3dir (sitehtml3dir.U):

This variable is really the same as sitehtml3direxp, unless you are using

AFS in which case it points to the read/write location whereas

html3direxp only points to the read-only access location. For extra

portability, you should only use this variable within your makefiles.

installsitelib (sitelib.U):

This variable is really the same as sitelibexp but may differ on

those systems using AFS. For extra portability, only this variable

should be used in makefiles.

installsiteman1dir (siteman1dir.U):

This variable is really the same as siteman1direxp, unless you are using

AFS in which case it points to the read/write location whereas

man1direxp only points to the read-only access location. For extra

portability, you should only use this variable within your makefiles.

installsiteman3dir (siteman3dir.U):

This variable is really the same as siteman3direxp, unless you are using

AFS in which case it points to the read/write location whereas

man3direxp only points to the read-only access location. For extra

portability, you should only use this variable within your makefiles.

installsitescript (sitescript.U):

This variable is usually the same as sitescriptexp, unless you are on

a system running AFS, in which case they may differ slightly. You

should always use this variable within your makefiles for portability.

installstyle (installstyle.U):

This variable describes the "style" of the perl installation.

This is intended to be useful for tools that need to

manipulate entire perl distributions. Perl itself doesn't use

this to find its libraries -- the library directories are

stored directly in Config.pm. Currently, there are only two

styles: "lib" and "lib/perl5". The default library locations

(e.g. privlib, sitelib) are either $prefix/lib or

$prefix/lib/perl5. The former is useful if $prefix is a

directory dedicated to perl (e.g. /opt/perl), while the latter

is useful if $prefix is shared by many packages, e.g. if

$prefix=/usr/local.

Unfortunately, while this "style" variable is used to set

defaults for all three directory hierarchies (core, vendor, and

site), there is no guarantee that the same style is actually

appropriate for all those directories. For example, $prefix

might be /opt/perl, but $siteprefix might be /usr/local.

(Perhaps, in retrospect, the "lib" style should never have been

supported, but it did seem like a nice idea at the time.)

The situation is even less clear for tools such as MakeMaker

that can be used to install additional modules into

non-standard places. For example, if a user intends to install

a module into a private directory (perhaps by setting PREFIX on

the Makefile.PL command line), then there is no reason to

assume that the Configure-time $installstyle setting will be

relevant for that PREFIX.

This may later be extended to include other information, so

be careful with pattern-matching on the results.

For compatibility with perl5.005 and earlier, the default

setting is based on whether or not $prefix contains the string

"perl".

installusrbinperl (instubperl.U):

This variable tells whether Perl should be installed also as

/usr/bin/perl in addition to

$installbin/perl

installvendorarch (vendorarch.U):

This variable is really the same as vendorarchexp but may differ on

those systems using AFS. For extra portability, only this variable

should be used in makefiles.

installvendorbin (vendorbin.U):

This variable is really the same as vendorbinexp but may differ on

those systems using AFS. For extra portability, only this variable

should be used in makefiles.

installvendorhtml1dir (vendorhtml1dir.U):

This variable is really the same as vendorhtml1direxp but may differ on

those systems using AFS. For extra portability, only this variable

should be used in makefiles.

installvendorhtml3dir (vendorhtml3dir.U):

This variable is really the same as vendorhtml3direxp but may differ on

those systems using AFS. For extra portability, only this variable

should be used in makefiles.

installvendorlib (vendorlib.U):

This variable is really the same as vendorlibexp but may differ on

those systems using AFS. For extra portability, only this variable

should be used in makefiles.

installvendorman1dir (vendorman1dir.U):

This variable is really the same as vendorman1direxp but may differ on

those systems using AFS. For extra portability, only this variable

should be used in makefiles.

installvendorman3dir (vendorman3dir.U):

This variable is really the same as vendorman3direxp but may differ on

those systems using AFS. For extra portability, only this variable

should be used in makefiles.

installvendorscript (vendorscript.U):

This variable is really the same as vendorscriptexp but may differ on

those systems using AFS. For extra portability, only this variable

should be used in makefiles.

intsize (intsize.U):

This variable contains the value of the INTSIZE symbol, which

indicates to the C program how many bytes there are in an int.

issymlink (issymlink.U):

This variable holds the test command to test for a symbolic link

(if they are supported). Typical values include 'test -h' and

'test -L'.

ivdformat (perlxvf.U):

This variable contains the format string used for printing

a Perl IV as a signed decimal integer.

ivsize (perlxv.U):

This variable is the size of an IV in bytes.

ivtype (perlxv.U):

This variable contains the C type used for Perl's IV.

known_extensions (Extensions.U):

This variable holds a list of all XS extensions included in

the package.

ksh (Loc.U):

This variable is defined but not used by Configure.

The value is a plain '' and is not useful.

ld (dlsrc.U):

This variable indicates the program to be used to link

libraries for dynamic loading. On some systems, it is 'ld'.

On ELF systems, it should be $cc. Mostly, we'll try to respect

the hint file setting.

lddlflags (dlsrc.U):

This variable contains any special flags that might need to be

passed to $ld to create a shared library suitable for dynamic

loading. It is up to the makefile to use it. For hpux, it

should be '-b'. For sunos 4.1, it is empty.

ldflags (ccflags.U):

This variable contains any additional C loader flags desired by

the user. It is up to the Makefile to use this.

ldflags_uselargefiles (uselfs.U):

This variable contains the loader flags needed by large file builds

and added to ldflags by hints files.

ldlibpthname (libperl.U):

This variable holds the name of the shared library

search path, often LD_LIBRARY_PATH. To get an empty

string, the hints file must set this to 'none'.

less (Loc.U):

This variable is used internally by Configure to determine the

full pathname (if any) of the less program. After Configure runs,

the value is reset to a plain "less" and is not useful.

lib_ext (Unix.U):

This is an old synonym for _a.

libc (libc.U):

This variable contains the location of the C library.

libperl (libperl.U):

The perl executable is obtained by linking perlmain.c with

libperl, any static extensions (usually just DynaLoader),

and any other libraries needed on this system. libperl

is usually libperl.a, but can also be libperl.so.xxx if

the user wishes to build a perl executable with a shared

library.

libpth (libpth.U):

This variable holds the general path (space-separated) used to find

libraries. It is intended to be used by other units.

libs (libs.U):

This variable holds the additional libraries we want to use.

It is up to the Makefile to deal with it. The list can be empty.

libsdirs (libs.U):

This variable holds the directory names aka dirnames of the libraries

we found and accepted, duplicates are removed.

libsfiles (libs.U):

This variable holds the filenames aka basenames of the libraries

we found and accepted.

libsfound (libs.U):

This variable holds the full pathnames of the libraries

we found and accepted.

libspath (libs.U):

This variable holds the directory names probed for libraries.

libswanted (Myinit.U):

This variable holds a list of all the libraries we want to

search. The order is chosen to pick up the c library

ahead of ucb or bsd libraries for SVR4.

libswanted_uselargefiles (uselfs.U):

This variable contains the libraries needed by large file builds

and added to ldflags by hints files. It is a space separated list

of the library names without the "lib" prefix or any suffix, just

like libswanted..

line (Loc.U):

This variable is defined but not used by Configure.

The value is a plain '' and is not useful.

lint (Loc.U):

This variable is defined but not used by Configure.

The value is a plain '' and is not useful.

lkflags (ccflags.U):

This variable contains any additional C partial linker flags desired by

the user. It is up to the Makefile to use this.

ln (Loc.U):

This variable is used internally by Configure to determine the

full pathname (if any) of the ln program. After Configure runs,

the value is reset to a plain "ln" and is not useful.

lns (lns.U):

This variable holds the name of the command to make

symbolic links (if they are supported). It can be used

in the Makefile. It is either 'ln -s' or 'ln'

localtime_r_proto (d_localtime_r.U):

This variable encodes the prototype of localtime_r.

It is zero if d_localtime_r is undef, and one of the

REENTRANT_PROTO_T_ABC macros of reentr.h if d_localtime_r

is defined.

locincpth (ccflags.U):

This variable contains a list of additional directories to be

searched by the compiler. The appropriate '-I' directives will

be added to ccflags. This is intended to simplify setting

local directories from the Configure command line.

It's not much, but it parallels the loclibpth stuff in libpth.U.

loclibpth (libpth.U):

This variable holds the paths (space-separated) used to find local

libraries. It is prepended to libpth, and is intended to be easily

set from the command line.

longdblsize (d_longdbl.U):

This variable contains the value of the LONG_DOUBLESIZE symbol, which

indicates to the C program how many bytes there are in a long double,

if this system supports long doubles.

longlongsize (d_longlong.U):

This variable contains the value of the LONGLONGSIZE symbol, which

indicates to the C program how many bytes there are in a long long,

if this system supports long long.

longsize (intsize.U):

This variable contains the value of the LONGSIZE symbol, which

indicates to the C program how many bytes there are in a long.

lp (Loc.U):

This variable is defined but not used by Configure.

The value is a plain '' and is not useful.

lpr (Loc.U):

This variable is defined but not used by Configure.

The value is a plain '' and is not useful.

ls (Loc.U):

This variable is used internally by Configure to determine the

full pathname (if any) of the ls program. After Configure runs,

the value is reset to a plain "ls" and is not useful.

lseeksize (lseektype.U):

This variable defines lseektype to be something like off_t, long,

or whatever type is used to declare lseek offset's type in the

kernel (which also appears to be lseek's return type).

lseektype (lseektype.U):

This variable defines lseektype to be something like off_t, long,

or whatever type is used to declare lseek offset's type in the

kernel (which also appears to be lseek's return type).

mail (Loc.U):

This variable is defined but not used by Configure.

The value is a plain '' and is not useful.

mailx (Loc.U):

This variable is defined but not used by Configure.

The value is a plain '' and is not useful.

make (Loc.U):

This variable is used internally by Configure to determine the

full pathname (if any) of the make program. After Configure runs,

the value is reset to a plain "make" and is not useful.

make_set_make (make.U):

Some versions of 'make' set the variable MAKE. Others do not.

This variable contains the string to be included in Makefile.SH

so that MAKE is set if needed, and not if not needed.

Possible values are:

make_set_make='#' # If your make program handles this for you,

make_set_make="MAKE=$make" # if it doesn't.

This uses a comment character to distinguish a

'set' value (from a previous config.sh or Configure '-D' option)

from an uncomputed value.

mallocobj (mallocsrc.U):

This variable contains the name of the malloc.o that this package

generates, if that malloc.o is preferred over the system malloc.

Otherwise the value is null. This variable is intended for generating

Makefiles. See mallocsrc.

mallocsrc (mallocsrc.U):

This variable contains the name of the malloc.c that comes with

the package, if that malloc.c is preferred over the system malloc.

Otherwise the value is null. This variable is intended for generating

Makefiles.

malloctype (mallocsrc.U):

This variable contains the kind of ptr returned by malloc and realloc.

man1dir (man1dir.U):

This variable contains the name of the directory in which manual

source pages are to be put. It is the responsibility of the

Makefile.SH to get the value of this into the proper command.

You must be prepared to do the ~name expansion yourself.

man1direxp (man1dir.U):

This variable is the same as the man1dir variable, but is filename

expanded at configuration time, for convenient use in makefiles.

man1ext (man1dir.U):

This variable contains the extension that the manual page should

have: one of 'n', 'l', or '1'. The Makefile must supply the '.'.

See man1dir.

man3dir (man3dir.U):

This variable contains the name of the directory in which manual

source pages are to be put. It is the responsibility of the

Makefile.SH to get the value of this into the proper command.

You must be prepared to do the ~name expansion yourself.

man3direxp (man3dir.U):

This variable is the same as the man3dir variable, but is filename

expanded at configuration time, for convenient use in makefiles.

man3ext (man3dir.U):

This variable contains the extension that the manual page should

have: one of 'n', 'l', or '3'. The Makefile must supply the '.'.

See man3dir.

Mcc (Loc.U):

This variable is used internally by Configure to determine the

full pathname (if any) of the Mcc program. After Configure runs,

the value is reset to a plain "Mcc" and is not useful.

mips_type (usrinc.U):

This variable holds the environment type for the mips system.

Possible values are "BSD 4.3" and "System V".

mistrustnm (Csym.U):

This variable can be used to establish a fallthrough for the cases

where nm fails to find a symbol. If usenm is false or usenm is true

and mistrustnm is false, this variable has no effect. If usenm is true

and mistrustnm is "compile", a test program will be compiled to try to

find any symbol that can't be located via nm lookup. If mistrustnm is

"run", the test program will be run as well as being compiled.

mkdir (Loc.U):

This variable is used internally by Configure to determine the

full pathname (if any) of the mkdir program. After Configure runs,

the value is reset to a plain "mkdir" and is not useful.

mmaptype (d_mmap.U):

This symbol contains the type of pointer returned by mmap()

(and simultaneously the type of the first argument).

It can be 'void *' or 'caddr_t'.

modetype (modetype.U):

This variable defines modetype to be something like mode_t,

int, unsigned short, or whatever type is used to declare file

modes for system calls.

more (Loc.U):

This variable is used internally by Configure to determine the

full pathname (if any) of the more program. After Configure runs,

the value is reset to a plain "more" and is not useful.

multiarch (multiarch.U):

This variable conditionally defines the MULTIARCH symbol

which signifies the presence of multiplatform files.

This is normally set by hints files.

mv (Loc.U):

This variable is defined but not used by Configure.

The value is a plain '' and is not useful.

myarchname (archname.U):

This variable holds the architecture name computed by Configure in

a previous run. It is not intended to be perused by any user and

should never be set in a hint file.

mydomain (myhostname.U):

This variable contains the eventual value of the MYDOMAIN symbol,

which is the domain of the host the program is going to run on.

The domain must be appended to myhostname to form a complete host name.

The dot comes with mydomain, and need not be supplied by the program.

myhostname (myhostname.U):

This variable contains the eventual value of the MYHOSTNAME symbol,

which is the name of the host the program is going to run on.

The domain is not kept with hostname, but must be gotten from mydomain.

The dot comes with mydomain, and need not be supplied by the program.

myuname (Oldconfig.U):

The output of 'uname -a' if available, otherwise the hostname. On Xenix,

pseudo variables assignments in the output are stripped, thank you. The

whole thing is then lower-cased.

n (n.U):

This variable contains the '-n' flag if that is what causes the echo

command to suppress newline. Otherwise it is null. Correct usage is

$echo $n "prompt for a question: $c".

need_va_copy (need_va_copy.U):

This symbol, if defined, indicates that the system stores

the variable argument list datatype, va_list, in a format

that cannot be copied by simple assignment, so that some

other means must be used when copying is required.

As such systems vary in their provision (or non-provision)

of copying mechanisms, handy.h defines a platform-

independent macro, Perl_va_copy(src, dst), to do the job.

netdb_hlen_type (netdbtype.U):

This variable holds the type used for the 2nd argument to

gethostbyaddr(). Usually, this is int or size_t or unsigned.

This is only useful if you have gethostbyaddr(), naturally.

netdb_host_type (netdbtype.U):

This variable holds the type used for the 1st argument to

gethostbyaddr(). Usually, this is char * or void *, possibly

with or without a const prefix.

This is only useful if you have gethostbyaddr(), naturally.

netdb_name_type (netdbtype.U):

This variable holds the type used for the argument to

gethostbyname(). Usually, this is char * or const char *.

This is only useful if you have gethostbyname(), naturally.

netdb_net_type (netdbtype.U):

This variable holds the type used for the 1st argument to

getnetbyaddr(). Usually, this is int or long.

This is only useful if you have getnetbyaddr(), naturally.

nm (Loc.U):

This variable is used internally by Configure to determine the

full pathname (if any) of the nm program. After Configure runs,

the value is reset to a plain "nm" and is not useful.

nm_opt (usenm.U):

This variable holds the options that may be necessary for nm.

nm_so_opt (usenm.U):

This variable holds the options that may be necessary for nm

to work on a shared library but that can not be used on an

archive library. Currently, this is only used by Linux, where

nm --dynamic is *required* to get symbols from an ELF library which

has been stripped, but nm --dynamic is *fatal* on an archive library.

Maybe Linux should just always set usenm=false.

nonxs_ext (Extensions.U):

This variable holds a list of all non-xs extensions included

in the package. All of them will be built.

nroff (Loc.U):

This variable is used internally by Configure to determine the

full pathname (if any) of the nroff program. After Configure runs,

the value is reset to a plain "nroff" and is not useful.

nv_preserves_uv_bits (perlxv.U):

This variable indicates how many of bits type uvtype

a variable nvtype can preserve.

nveformat (perlxvf.U):

This variable contains the format string used for printing

a Perl NV using %e-ish floating point format.

nvEUformat (perlxvf.U):

This variable contains the format string used for printing

a Perl NV using %E-ish floating point format.

nvfformat (perlxvf.U):

This variable confains the format string used for printing

a Perl NV using %f-ish floating point format.

nvFUformat (perlxvf.U):

This variable confains the format string used for printing

a Perl NV using %F-ish floating point format.

nvgformat (perlxvf.U):

This variable contains the format string used for printing

a Perl NV using %g-ish floating point format.

nvGUformat (perlxvf.U):

This variable contains the format string used for printing

a Perl NV using %G-ish floating point format.

nvsize (perlxv.U):

This variable is the size of an NV in bytes.

nvtype (perlxv.U):

This variable contains the C type used for Perl's NV.

o_nonblock (nblock_io.U):

This variable bears the symbol value to be used during open() or fcntl()

to turn on non-blocking I/O for a file descriptor. If you wish to switch

between blocking and non-blocking, you may try ioctl(FIOSNBIO) instead,

but that is only supported by some devices.

obj_ext (Unix.U):

This is an old synonym for _o.

old_pthread_create_joinable (d_pthrattrj.U):

This variable defines the constant to use for creating joinable

(aka undetached) pthreads. Unused if pthread.h defines

PTHREAD_CREATE_JOINABLE. If used, possible values are

PTHREAD_CREATE_UNDETACHED and __UNDETACHED.

optimize (ccflags.U):

This variable contains any optimizer/debugger flag that should be used.

It is up to the Makefile to use it.

orderlib (orderlib.U):

This variable is "true" if the components of libraries must be ordered

(with `lorder $* | tsort`) before placing them in an archive. Set to

"false" if ranlib or ar can generate random libraries.

osname (Oldconfig.U):

This variable contains the operating system name (e.g. sunos,

solaris, hpux, etc.). It can be useful later on for setting

defaults. Any spaces are replaced with underscores. It is set

to a null string if we can't figure it out.

osvers (Oldconfig.U):

This variable contains the operating system version (e.g.

4.1.3, 5.2, etc.). It is primarily used for helping select

an appropriate hints file, but might be useful elsewhere for

setting defaults. It is set to '' if we can't figure it out.

We try to be flexible about how much of the version number

to keep, e.g. if 4.1.1, 4.1.2, and 4.1.3 are essentially the

same for this package, hints files might just be os_4.0 or

os_4.1, etc., not keeping separate files for each little release.

otherlibdirs (otherlibdirs.U):

This variable contains a colon-separated set of paths for the perl

binary to search for additional library files or modules.

These directories will be tacked to the end of @INC.

Perl will automatically search below each path for version-

and architecture-specific directories. See inc_version_list

for more details.

A value of ' ' means 'none' and is used to preserve this value

for the next run through Configure.

package (package.U):

This variable contains the name of the package being constructed.

It is primarily intended for the use of later Configure units.

pager (pager.U):

This variable contains the name of the preferred pager on the system.

Usual values are (the full pathnames of) more, less, pg, or cat.

passcat (nis.U):

This variable contains a command that produces the text of the

/etc/passwd file. This is normally "cat /etc/passwd", but can be

"ypcat passwd" when NIS is used.

On some systems, such as os390, there may be no equivalent

command, in which case this variable is unset.

patchlevel (patchlevel.U):

The patchlevel level of this package.

The value of patchlevel comes from the patchlevel.h file.

In a version number such as 5.6.1, this is the "6".

In patchlevel.h, this is referred to as "PERL_VERSION".

path_sep (Unix.U):

This is an old synonym for p_ in Head.U, the character

used to separate elements in the command shell search PATH.

perl5 (perl5.U):

This variable contains the full path (if any) to a previously

installed perl5.005 or later suitable for running the script

to determine inc_version_list.

perl (Loc.U):

This variable is defined but not used by Configure.

The value is a plain '' and is not useful.

perl_patchlevel (patchlevel.U):

This is the Perl patch level, a numeric change identifier,

as defined by whichever source code maintenance system

is used to maintain the patches; currently Perforce.

It does not correlate with the Perl version numbers or

the maintenance versus development dichotomy except

by also being increasing.

PERL_REVISION (Oldsyms.U):

In a Perl version number such as 5.6.2, this is the 5.

This value is manually set in patchlevel.h

PERL_SUBVERSION (Oldsyms.U):

In a Perl version number such as 5.6.2, this is the 2.

Values greater than 50 represent potentially unstable

development subversions.

This value is manually set in patchlevel.h

PERL_VERSION (Oldsyms.U):

In a Perl version number such as 5.6.2, this is the 6.

This value is manually set in patchlevel.h

perladmin (perladmin.U):

Electronic mail address of the perl5 administrator.

perllibs (End.U):

The list of libraries needed by Perl only (any libraries needed

by extensions only will by dropped, if using dynamic loading).

perlpath (perlpath.U):

This variable contains the eventual value of the PERLPATH symbol,

which contains the name of the perl interpreter to be used in

shell scripts and in the "eval 'exec'" idiom. This variable is

not necessarily the pathname of the file containing the perl

interpreter; you must append the executable extension (_exe) if

it is not already present. Note that Perl code that runs during

the Perl build process cannot reference this variable, as Perl

may not have been installed, or even if installed, may be a

different version of Perl.

pg (Loc.U):

This variable is used internally by Configure to determine the

full pathname (if any) of the pg program. After Configure runs,

the value is reset to a plain "pg" and is not useful.

phostname (myhostname.U):

This variable contains the eventual value of the PHOSTNAME symbol,

which is a command that can be fed to popen() to get the host name.

The program should probably not presume that the domain is or isn't

there already.

pidtype (pidtype.U):

This variable defines PIDTYPE to be something like pid_t, int,

ushort, or whatever type is used to declare process ids in the kernel.

plibpth (libpth.U):

Holds the private path used by Configure to find out the libraries.

Its value is prepend to libpth. This variable takes care of special

machines, like the mips. Usually, it should be empty.

pmake (Loc.U):

This variable is defined but not used by Configure.

The value is a plain '' and is not useful.

pr (Loc.U):

This variable is defined but not used by Configure.

The value is a plain '' and is not useful.

prefix (prefix.U):

This variable holds the name of the directory below which the

user will install the package. Usually, this is /usr/local, and

executables go in /usr/local/bin, library stuff in /usr/local/lib,

man pages in /usr/local/man, etc. It is only used to set defaults

for things in bin.U, mansrc.U, privlib.U, or scriptdir.U.

prefixexp (prefix.U):

This variable holds the full absolute path of the directory below

which the user will install the package. Derived from prefix.

privlib (privlib.U):

This variable contains the eventual value of the PRIVLIB symbol,

which is the name of the private library for this package. It may

have a ~ on the front. It is up to the makefile to eventually create

this directory while performing installation (with ~ substitution).

privlibexp (privlib.U):

This variable is the ~name expanded version of privlib, so that you

may use it directly in Makefiles or shell scripts.

procselfexe (d_procselfexe.U):

If d_procselfexe is defined, $procselfexe is the filename

of the symbolic link pointing to the absolute pathname of

the executing program.

prototype (prototype.U):

This variable holds the eventual value of CAN_PROTOTYPE, which

indicates the C compiler can handle funciton prototypes.

ptrsize (ptrsize.U):

This variable contains the value of the PTRSIZE symbol, which

indicates to the C program how many bytes there are in a pointer.

quadkind (quadtype.U):

This variable, if defined, encodes the type of a quad:

1 = int, 2 = long, 3 = long long, 4 = int64_t.

quadtype (quadtype.U):

This variable defines Quad_t to be something like long, int,

long long, int64_t, or whatever type is used for 64-bit integers.

randbits (randfunc.U):

Indicates how many bits are produced by the function used to

generate normalized random numbers.

randfunc (randfunc.U):

Indicates the name of the random number function to use.

Values include drand48, random, and rand. In C programs,

the 'Drand01' macro is defined to generate uniformly distributed

random numbers over the range [0., 1.[ (see drand01 and nrand).

random_r_proto (d_random_r.U):

This variable encodes the prototype of random_r.

It is zero if d_random_r is undef, and one of the

REENTRANT_PROTO_T_ABC macros of reentr.h if d_random_r

is defined.

randseedtype (randfunc.U):

Indicates the type of the argument of the seedfunc.

ranlib (orderlib.U):

This variable is set to the pathname of the ranlib program, if it is

needed to generate random libraries. Set to ":" if ar can generate

random libraries or if random libraries are not supported

rd_nodata (nblock_io.U):

This variable holds the return code from read() when no data is

present. It should be -1, but some systems return 0 when O_NDELAY is

used, which is a shame because you cannot make the difference between

no data and an EOF.. Sigh!

readdir64_r_proto (d_readdir64_r.U):

This variable encodes the prototype of readdir64_r.

It is zero if d_readdir64_r is undef, and one of the

REENTRANT_PROTO_T_ABC macros of reentr.h if d_readdir64_r

is defined.

readdir_r_proto (d_readdir_r.U):

This variable encodes the prototype of readdir_r.

It is zero if d_readdir_r is undef, and one of the

REENTRANT_PROTO_T_ABC macros of reentr.h if d_readdir_r

is defined.

revision (patchlevel.U):

The value of revision comes from the patchlevel.h file.

In a version number such as 5.6.1, this is the "5".

In patchlevel.h, this is referred to as "PERL_REVISION".

rm (Loc.U):

This variable is used internally by Configure to determine the

full pathname (if any) of the rm program. After Configure runs,

the value is reset to a plain "rm" and is not useful.

rmail (Loc.U):

This variable is defined but not used by Configure.

The value is a plain '' and is not useful.

run (Cross.U):

This variable contains the command used by Configure

to copy and execute a cross-compiled executable in the

target host. Useful and available only during Perl build.

Empty string '' if not cross-compiling.

runnm (usenm.U):

This variable contains 'true' or 'false' depending whether the

nm extraction should be performed or not, according to the value

of usenm and the flags on the Configure command line.

sched_yield (d_pthread_y.U):

This variable defines the way to yield the execution

of the current thread.

scriptdir (scriptdir.U):

This variable holds the name of the directory in which the user wants

to put publicly scripts for the package in question. It is either

the same directory as for binaries, or a special one that can be

mounted across different architectures, like /usr/share. Programs

must be prepared to deal with ~name expansion.

scriptdirexp (scriptdir.U):

This variable is the same as scriptdir, but is filename expanded

at configuration time, for programs not wanting to bother with it.

sed (Loc.U):

This variable is used internally by Configure to determine the

full pathname (if any) of the sed program. After Configure runs,

the value is reset to a plain "sed" and is not useful.

seedfunc (randfunc.U):

Indicates the random number generating seed function.

Values include srand48, srandom, and srand.

selectminbits (selectminbits.U):

This variable holds the minimum number of bits operated by select.

That is, if you do select(n, ...), how many bits at least will be

cleared in the masks if some activity is detected. Usually this

is either n or 32*ceil(n/32), especially many little-endians do

the latter. This is only useful if you have select(), naturally.

selecttype (selecttype.U):

This variable holds the type used for the 2nd, 3rd, and 4th

arguments to select. Usually, this is 'fd_set *', if HAS_FD_SET

is defined, and 'int *' otherwise. This is only useful if you

have select(), naturally.

sendmail (Loc.U):

This variable is defined but not used by Configure.

The value is a plain '' and is not useful.

setgrent_r_proto (d_setgrent_r.U):

This variable encodes the prototype of setgrent_r.

It is zero if d_setgrent_r is undef, and one of the

REENTRANT_PROTO_T_ABC macros of reentr.h if d_setgrent_r

is defined.

sethostent_r_proto (d_sethostent_r.U):

This variable encodes the prototype of sethostent_r.

It is zero if d_sethostent_r is undef, and one of the

REENTRANT_PROTO_T_ABC macros of reentr.h if d_sethostent_r

is defined.

setlocale_r_proto (d_setlocale_r.U):

This variable encodes the prototype of setlocale_r.

It is zero if d_setlocale_r is undef, and one of the

REENTRANT_PROTO_T_ABC macros of reentr.h if d_setlocale_r

is defined.

setnetent_r_proto (d_setnetent_r.U):

This variable encodes the prototype of setnetent_r.

It is zero if d_setnetent_r is undef, and one of the

REENTRANT_PROTO_T_ABC macros of reentr.h if d_setnetent_r

is defined.

setprotoent_r_proto (d_setprotoent_r.U):

This variable encodes the prototype of setprotoent_r.

It is zero if d_setprotoent_r is undef, and one of the

REENTRANT_PROTO_T_ABC macros of reentr.h if d_setprotoent_r

is defined.

setpwent_r_proto (d_setpwent_r.U):

This variable encodes the prototype of setpwent_r.

It is zero if d_setpwent_r is undef, and one of the

REENTRANT_PROTO_T_ABC macros of reentr.h if d_setpwent_r

is defined.

setservent_r_proto (d_setservent_r.U):

This variable encodes the prototype of setservent_r.

It is zero if d_setservent_r is undef, and one of the

REENTRANT_PROTO_T_ABC macros of reentr.h if d_setservent_r

is defined.

sh (sh.U):

This variable contains the full pathname of the shell used

on this system to execute Bourne shell scripts. Usually, this will be

/bin/sh, though it's possible that some systems will have /bin/ksh,

/bin/pdksh, /bin/ash, /bin/bash, or even something such as

D:/bin/sh.exe.

This unit comes before Options.U, so you can't set sh with a '-D'

option, though you can override this (and startsh)

with '-O -Dsh=/bin/whatever -Dstartsh=whatever'

shar (Loc.U):

This variable is defined but not used by Configure.

The value is a plain '' and is not useful.

sharpbang (spitshell.U):

This variable contains the string #! if this system supports that

construct.

shmattype (d_shmat.U):

This symbol contains the type of pointer returned by shmat().

It can be 'void *' or 'char *'.

shortsize (intsize.U):

This variable contains the value of the SHORTSIZE symbol which

indicates to the C program how many bytes there are in a short.

shrpenv (libperl.U):

If the user builds a shared libperl.so, then we need to tell the

'perl' executable where it will be able to find the installed libperl.so.

One way to do this on some systems is to set the environment variable

LD_RUN_PATH to the directory that will be the final location of the

shared libperl.so. The makefile can use this with something like

$shrpenv $(CC) -o perl perlmain.o $libperl $libs

Typical values are

shrpenv="env LD_RUN_PATH=$archlibexp/CORE"

or

shrpenv=''

See the main perl Makefile.SH for actual working usage.

Alternatively, we might be able to use a command line option such

as -R $archlibexp/CORE (Solaris) or -Wl,-rpath

$archlibexp/CORE (Linux).

shsharp (spitshell.U):

This variable tells further Configure units whether your sh can

handle # comments.

sig_count (sig_name.U):

This variable holds a number larger than the largest valid

signal number. This is usually the same as the NSIG macro.

sig_name (sig_name.U):

This variable holds the signal names, space separated. The leading

SIG in signal name is removed. A ZERO is prepended to the list.

This is currently not used, sig_name_init is used instead.

sig_name_init (sig_name.U):

This variable holds the signal names, enclosed in double quotes and

separated by commas, suitable for use in the SIG_NAME definition

below. A "ZERO" is prepended to the list, and the list is

terminated with a plain 0. The leading SIG in signal names

is removed. See sig_num.

sig_num (sig_name.U):

This variable holds the signal numbers, space separated. A ZERO is

prepended to the list (corresponding to the fake SIGZERO).

Those numbers correspond to the value of the signal listed

in the same place within the sig_name list.

This is currently not used, sig_num_init is used instead.

sig_num_init (sig_name.U):

This variable holds the signal numbers, enclosed in double quotes and

separated by commas, suitable for use in the SIG_NUM definition

below. A "ZERO" is prepended to the list, and the list is

terminated with a plain 0.

sig_size (sig_name.U):

This variable contains the number of elements of the sig_name

and sig_num arrays.

signal_t (d_voidsig.U):

This variable holds the type of the signal handler (void or int).

sitearch (sitearch.U):

This variable contains the eventual value of the SITEARCH symbol,

which is the name of the private library for this package. It may

have a ~ on the front. It is up to the makefile to eventually create

this directory while performing installation (with ~ substitution).

The standard distribution will put nothing in this directory.

After perl has been installed, users may install their own local

architecture-dependent modules in this directory with

MakeMaker Makefile.PL

or equivalent. See INSTALL for details.

sitearchexp (sitearch.U):

This variable is the ~name expanded version of sitearch, so that you

may use it directly in Makefiles or shell scripts.

sitebin (sitebin.U):

This variable holds the name of the directory in which the user wants

to put add-on publicly executable files for the package in question. It

is most often a local directory such as /usr/local/bin. Programs using

this variable must be prepared to deal with ~name substitution.

The standard distribution will put nothing in this directory.

After perl has been installed, users may install their own local

executables in this directory with

MakeMaker Makefile.PL

or equivalent. See INSTALL for details.

sitebinexp (sitebin.U):

This is the same as the sitebin variable, but is filename expanded at

configuration time, for use in your makefiles.

sitehtml1dir (sitehtml1dir.U):

This variable contains the name of the directory in which site-specific

html source pages are to be put. It is the responsibility of the

Makefile.SH to get the value of this into the proper command.

You must be prepared to do the ~name expansion yourself.

The standard distribution will put nothing in this directory.

After perl has been installed, users may install their own local

html pages in this directory with

MakeMaker Makefile.PL

or equivalent. See INSTALL for details.

sitehtml1direxp (sitehtml1dir.U):

This variable is the same as the sitehtml1dir variable, but is filename

expanded at configuration time, for convenient use in makefiles.

sitehtml3dir (sitehtml3dir.U):

This variable contains the name of the directory in which site-specific

library html source pages are to be put. It is the responsibility of the

Makefile.SH to get the value of this into the proper command.

You must be prepared to do the ~name expansion yourself.

The standard distribution will put nothing in this directory.

After perl has been installed, users may install their own local

library html pages in this directory with

MakeMaker Makefile.PL

or equivalent. See INSTALL for details.

sitehtml3direxp (sitehtml3dir.U):

This variable is the same as the sitehtml3dir variable, but is filename

expanded at configuration time, for convenient use in makefiles.

sitelib (sitelib.U):

This variable contains the eventual value of the SITELIB symbol,

which is the name of the private library for this package. It may

have a ~ on the front. It is up to the makefile to eventually create

this directory while performing installation (with ~ substitution).

The standard distribution will put nothing in this directory.

After perl has been installed, users may install their own local

architecture-independent modules in this directory with

MakeMaker Makefile.PL

or equivalent. See INSTALL for details.

sitelib_stem (sitelib.U):

This variable is $sitelibexp with any trailing version-specific component

removed. The elements in inc_version_list (inc_version_list.U) can

be tacked onto this variable to generate a list of directories to search.

sitelibexp (sitelib.U):

This variable is the ~name expanded version of sitelib, so that you

may use it directly in Makefiles or shell scripts.

siteman1dir (siteman1dir.U):

This variable contains the name of the directory in which site-specific

manual source pages are to be put. It is the responsibility of the

Makefile.SH to get the value of this into the proper command.

You must be prepared to do the ~name expansion yourself.

The standard distribution will put nothing in this directory.

After perl has been installed, users may install their own local

man1 pages in this directory with

MakeMaker Makefile.PL

or equivalent. See INSTALL for details.

siteman1direxp (siteman1dir.U):

This variable is the same as the siteman1dir variable, but is filename

expanded at configuration time, for convenient use in makefiles.

siteman3dir (siteman3dir.U):

This variable contains the name of the directory in which site-specific

library man source pages are to be put. It is the responsibility of the

Makefile.SH to get the value of this into the proper command.

You must be prepared to do the ~name expansion yourself.

The standard distribution will put nothing in this directory.

After perl has been installed, users may install their own local

man3 pages in this directory with

MakeMaker Makefile.PL

or equivalent. See INSTALL for details.

siteman3direxp (siteman3dir.U):

This variable is the same as the siteman3dir variable, but is filename

expanded at configuration time, for convenient use in makefiles.

siteprefix (siteprefix.U):

This variable holds the full absolute path of the directory below

which the user will install add-on packages.

See INSTALL for usage and examples.

siteprefixexp (siteprefix.U):

This variable holds the full absolute path of the directory below

which the user will install add-on packages. Derived from siteprefix.

sitescript (sitescript.U):

This variable holds the name of the directory in which the user wants

to put add-on publicly executable files for the package in question. It

is most often a local directory such as /usr/local/bin. Programs using

this variable must be prepared to deal with ~name substitution.

The standard distribution will put nothing in this directory.

After perl has been installed, users may install their own local

scripts in this directory with

MakeMaker Makefile.PL

or equivalent. See INSTALL for details.

sitescriptexp (sitescript.U):

This is the same as the sitescript variable, but is filename expanded at

configuration time, for use in your makefiles.

sizesize (sizesize.U):

This variable contains the size of a sizetype in bytes.

sizetype (sizetype.U):

This variable defines sizetype to be something like size_t,

unsigned long, or whatever type is used to declare length

parameters for string functions.

sleep (Loc.U):

This variable is defined but not used by Configure.

The value is a plain '' and is not useful.

smail (Loc.U):

This variable is defined but not used by Configure.

The value is a plain '' and is not useful.

so (so.U):

This variable holds the extension used to identify shared libraries

(also known as shared objects) on the system. Usually set to 'so'.

sockethdr (d_socket.U):

This variable has any cpp '-I' flags needed for socket support.

socketlib (d_socket.U):

This variable has the names of any libraries needed for socket support.

socksizetype (socksizetype.U):

This variable holds the type used for the size argument

for various socket calls like accept. Usual values include

socklen_t, size_t, and int.

sort (Loc.U):

This variable is used internally by Configure to determine the

full pathname (if any) of the sort program. After Configure runs,

the value is reset to a plain "sort" and is not useful.

spackage (package.U):

This variable contains the name of the package being constructed,

with the first letter uppercased, i.e. suitable for starting

sentences.

spitshell (spitshell.U):

This variable contains the command necessary to spit out a runnable

shell on this system. It is either cat or a grep '-v' for # comments.

sPRId64 (quadfio.U):

This variable, if defined, contains the string used by stdio to

format 64-bit decimal numbers (format 'd') for output.

sPRIeldbl (longdblfio.U):

This variable, if defined, contains the string used by stdio to

format long doubles (format 'e') for output.

sPRIEUldbl (longdblfio.U):

This variable, if defined, contains the string used by stdio to

format long doubles (format 'E') for output.

The 'U' in the name is to separate this from sPRIeldbl so that even

case-blind systems can see the difference.

sPRIfldbl (longdblfio.U):

This variable, if defined, contains the string used by stdio to

format long doubles (format 'f') for output.

sPRIFUldbl (longdblfio.U):

This variable, if defined, contains the string used by stdio to

format long doubles (format 'F') for output.

The 'U' in the name is to separate this from sPRIfldbl so that even

case-blind systems can see the difference.

sPRIgldbl (longdblfio.U):

This variable, if defined, contains the string used by stdio to

format long doubles (format 'g') for output.

sPRIGUldbl (longdblfio.U):

This variable, if defined, contains the string used by stdio to

format long doubles (format 'G') for output.

The 'U' in the name is to separate this from sPRIgldbl so that even

case-blind systems can see the difference.

sPRIi64 (quadfio.U):

This variable, if defined, contains the string used by stdio to

format 64-bit decimal numbers (format 'i') for output.

sPRIo64 (quadfio.U):

This variable, if defined, contains the string used by stdio to

format 64-bit octal numbers (format 'o') for output.

sPRIu64 (quadfio.U):

This variable, if defined, contains the string used by stdio to

format 64-bit unsigned decimal numbers (format 'u') for output.

sPRIx64 (quadfio.U):

This variable, if defined, contains the string used by stdio to

format 64-bit hexadecimal numbers (format 'x') for output.

sPRIXU64 (quadfio.U):

This variable, if defined, contains the string used by stdio to

format 64-bit hExADECimAl numbers (format 'X') for output.

The 'U' in the name is to separate this from sPRIx64 so that even

case-blind systems can see the difference.

srand48_r_proto (d_srand48_r.U):

This variable encodes the prototype of srand48_r.

It is zero if d_srand48_r is undef, and one of the

REENTRANT_PROTO_T_ABC macros of reentr.h if d_srand48_r

is defined.

srandom_r_proto (d_srandom_r.U):

This variable encodes the prototype of srandom_r.

It is zero if d_srandom_r is undef, and one of the

REENTRANT_PROTO_T_ABC macros of reentr.h if d_srandom_r

is defined.

src (src.U):

This variable holds the path to the package source. It is up to

the Makefile to use this variable and set VPATH accordingly to

find the sources remotely.

sSCNfldbl (longdblfio.U):

This variable, if defined, contains the string used by stdio to

format long doubles (format 'f') for input.

ssizetype (ssizetype.U):

This variable defines ssizetype to be something like ssize_t,

long or int. It is used by functions that return a count

of bytes or an error condition. It must be a signed type.

We will pick a type such that sizeof(SSize_t) == sizeof(Size_t).

startperl (startperl.U):

This variable contains the string to put on the front of a perl

script to make sure (hopefully) that it runs with perl and not some

shell. Of course, that leading line must be followed by the classical

perl idiom:

eval 'exec perl -S $0 ${1+"$@"}'

if $running_under_some_shell;

to guarantee perl startup should the shell execute the script. Note

that this magic incatation is not understood by csh.

startsh (startsh.U):

This variable contains the string to put on the front of a shell

script to make sure (hopefully) that it runs with sh and not some

other shell.

static_ext (Extensions.U):

This variable holds a list of XS extension files we want to

link statically into the package. It is used by Makefile.

stdchar (stdchar.U):

This variable conditionally defines STDCHAR to be the type of char

used in stdio.h. It has the values "unsigned char" or "char".

stdio_base (d_stdstdio.U):

This variable defines how, given a FILE pointer, fp, to access the

_base field (or equivalent) of stdio.h's FILE structure. This will

be used to define the macro FILE_base(fp).

stdio_bufsiz (d_stdstdio.U):

This variable defines how, given a FILE pointer, fp, to determine

the number of bytes store in the I/O buffer pointer to by the

_base field (or equivalent) of stdio.h's FILE structure. This will

be used to define the macro FILE_bufsiz(fp).

stdio_cnt (d_stdstdio.U):

This variable defines how, given a FILE pointer, fp, to access the

_cnt field (or equivalent) of stdio.h's FILE structure. This will

be used to define the macro FILE_cnt(fp).

stdio_filbuf (d_stdstdio.U):

This variable defines how, given a FILE pointer, fp, to tell

stdio to refill its internal buffers (?). This will

be used to define the macro FILE_filbuf(fp).

stdio_ptr (d_stdstdio.U):

This variable defines how, given a FILE pointer, fp, to access the

_ptr field (or equivalent) of stdio.h's FILE structure. This will

be used to define the macro FILE_ptr(fp).

stdio_stream_array (stdio_streams.U):

This variable tells the name of the array holding the stdio streams.

Usual values include _iob, __iob, and __sF.

strerror_r_proto (d_strerror_r.U):

This variable encodes the prototype of strerror_r.

It is zero if d_strerror_r is undef, and one of the

REENTRANT_PROTO_T_ABC macros of reentr.h if d_strerror_r

is defined.

strings (i_string.U):

This variable holds the full path of the string header that will be

used. Typically /usr/include/string.h or /usr/include/strings.h.

submit (Loc.U):

This variable is defined but not used by Configure.

The value is a plain '' and is not useful.

subversion (patchlevel.U):

The subversion level of this package.

The value of subversion comes from the patchlevel.h file.

In a version number such as 5.6.1, this is the "1".

In patchlevel.h, this is referred to as "PERL_SUBVERSION".

This is unique to perl.

sysman (sysman.U):

This variable holds the place where the manual is located on this

system. It is not the place where the user wants to put his manual

pages. Rather it is the place where Configure may look to find manual

for unix commands (section 1 of the manual usually). See mansrc.

tail (Loc.U):

This variable is defined but not used by Configure.

The value is a plain '' and is not useful.

tar (Loc.U):

This variable is defined but not used by Configure.

The value is a plain '' and is not useful.

targetarch (Cross.U):

If cross-compiling, this variable contains the target architecture.

If not, this will be empty.

tbl (Loc.U):

This variable is defined but not used by Configure.

The value is a plain '' and is not useful.

tee (Loc.U):

This variable is defined but not used by Configure.

The value is a plain '' and is not useful.

test (Loc.U):

This variable is used internally by Configure to determine the

full pathname (if any) of the test program. After Configure runs,

the value is reset to a plain "test" and is not useful.

timeincl (i_time.U):

This variable holds the full path of the included time header(s).

timetype (d_time.U):

This variable holds the type returned by time(). It can be long,

or time_t on BSD sites (in which case <sys/types.h> should be

included). Anyway, the type Time_t should be used.

tmpnam_r_proto (d_tmpnam_r.U):

This variable encodes the prototype of tmpnam_r.

It is zero if d_tmpnam_r is undef, and one of the

REENTRANT_PROTO_T_ABC macros of reentr.h if d_tmpnam_r

is defined.

to (Cross.U):

This variable contains the command used by Configure

to copy to from the target host. Useful and available

only during Perl build.

The string ':' if not cross-compiling.

touch (Loc.U):

This variable is used internally by Configure to determine the

full pathname (if any) of the touch program. After Configure runs,

the value is reset to a plain "touch" and is not useful.

tr (Loc.U):

This variable is used internally by Configure to determine the

full pathname (if any) of the tr program. After Configure runs,

the value is reset to a plain "tr" and is not useful.

trnl (trnl.U):

This variable contains the value to be passed to the tr(1)

command to transliterate a newline. Typical values are

'\012' and '\n'. This is needed for EBCDIC systems where

newline is not necessarily '\012'.

troff (Loc.U):

This variable is defined but not used by Configure.

The value is a plain '' and is not useful.

ttyname_r_proto (d_ttyname_r.U):

This variable encodes the prototype of ttyname_r.

It is zero if d_ttyname_r is undef, and one of the

REENTRANT_PROTO_T_ABC macros of reentr.h if d_ttyname_r

is defined.

u16size (perlxv.U):

This variable is the size of an U16 in bytes.

u16type (perlxv.U):

This variable contains the C type used for Perl's U16.

u32size (perlxv.U):

This variable is the size of an U32 in bytes.

u32type (perlxv.U):

This variable contains the C type used for Perl's U32.

u64size (perlxv.U):

This variable is the size of an U64 in bytes.

u64type (perlxv.U):

This variable contains the C type used for Perl's U64.

u8size (perlxv.U):

This variable is the size of an U8 in bytes.

u8type (perlxv.U):

This variable contains the C type used for Perl's U8.

uidformat (uidf.U):

This variable contains the format string used for printing a Uid_t.

uidsign (uidsign.U):

This variable contains the signedness of a uidtype.

1 for unsigned, -1 for signed.

uidsize (uidsize.U):

This variable contains the size of a uidtype in bytes.

uidtype (uidtype.U):

This variable defines Uid_t to be something like uid_t, int,

ushort, or whatever type is used to declare user ids in the kernel.

uname (Loc.U):

This variable is used internally by Configure to determine the

full pathname (if any) of the uname program. After Configure runs,

the value is reset to a plain "uname" and is not useful.

uniq (Loc.U):

This variable is used internally by Configure to determine the

full pathname (if any) of the uniq program. After Configure runs,

the value is reset to a plain "uniq" and is not useful.

uquadtype (quadtype.U):

This variable defines Uquad_t to be something like unsigned long,

unsigned int, unsigned long long, uint64_t, or whatever type is

used for 64-bit integers.

use5005threads (usethreads.U):

This variable conditionally defines the USE_5005THREADS symbol,

and indicates that Perl should be built to use the 5.005-based

threading implementation.

use64bitall (use64bits.U):

This variable conditionally defines the USE_64_BIT_ALL symbol,

and indicates that 64-bit integer types should be used

when available. The maximal possible

64-bitness is employed: LP64 or ILP64, meaning that you will

be able to use more than 2 gigabytes of memory. This mode is

even more binary incompatible than USE_64_BIT_INT. You may not

be able to run the resulting executable in a 32-bit CPU at all or

you may need at least to reboot your OS to 64-bit mode.

use64bitint (use64bits.U):

This variable conditionally defines the USE_64_BIT_INT symbol,

and indicates that 64-bit integer types should be used

when available. The minimal possible 64-bitness

is employed, just enough to get 64-bit integers into Perl.

This may mean using for example "long longs", while your memory

may still be limited to 2 gigabytes.

usecrosscompile (Cross.U):

This variable conditionally defines the USE_CROSS_COMPILE symbol,

and indicates that Perl has been cross-compiled.

usedl (dlsrc.U):

This variable indicates if the system supports dynamic

loading of some sort. See also dlsrc and dlobj.

usefaststdio (usefaststdio.U):

This variable conditionally defines the USE_FAST_STDIO symbol,

and indicates that Perl should be built to use 'fast stdio'.

Defaults to define in Perls 5.8 and earlier, to undef later.

useithreads (usethreads.U):

This variable conditionally defines the USE_ITHREADS symbol,

and indicates that Perl should be built to use the interpreter-based

threading implementation.

uselargefiles (uselfs.U):

This variable conditionally defines the USE_LARGE_FILES symbol,

and indicates that large file interfaces should be used when

available.

uselongdouble (uselongdbl.U):

This variable conditionally defines the USE_LONG_DOUBLE symbol,

and indicates that long doubles should be used when available.

usemorebits (usemorebits.U):

This variable conditionally defines the USE_MORE_BITS symbol,

and indicates that explicit 64-bit interfaces and long doubles

should be used when available.

usemultiplicity (usemultiplicity.U):

This variable conditionally defines the MULTIPLICITY symbol,

and indicates that Perl should be built to use multiplicity.

usemymalloc (mallocsrc.U):

This variable contains y if the malloc that comes with this package

is desired over the system's version of malloc. People often include

special versions of malloc for effiency, but such versions are often

less portable. See also mallocsrc and mallocobj.

If this is 'y', then -lmalloc is removed from $libs.

usenm (usenm.U):

This variable contains 'true' or 'false' depending whether the

nm extraction is wanted or not.

useopcode (Extensions.U):

This variable holds either 'true' or 'false' to indicate

whether the Opcode extension should be used. The sole

use for this currently is to allow an easy mechanism

for users to skip the Opcode extension from the Configure

command line.

useperlio (useperlio.U):

This variable conditionally defines the USE_PERLIO symbol,

and indicates that the PerlIO abstraction should be

used throughout.

useposix (Extensions.U):

This variable holds either 'true' or 'false' to indicate

whether the POSIX extension should be used. The sole

use for this currently is to allow an easy mechanism

for hints files to indicate that POSIX will not compile

on a particular system.

usereentrant (usethreads.U):

This variable conditionally defines the USE_REENTRANT_API symbol,

which indicates that the thread code may try to use the various

_r versions of library functions. This is only potentially

meaningful if usethreads is set and is very experimental, it is

not even prompted for.

usesfio (d_sfio.U):

This variable is set to true when the user agrees to use sfio.

It is set to false when sfio is not available or when the user

explicitely requests not to use sfio. It is here primarily so

that command-line settings can override the auto-detection of

d_sfio without running into a "WHOA THERE".

useshrplib (libperl.U):

This variable is set to 'true' if the user wishes

to build a shared libperl, and 'false' otherwise.

usesocks (usesocks.U):

This variable conditionally defines the USE_SOCKS symbol,

and indicates that Perl should be built to use SOCKS.

usethreads (usethreads.U):

This variable conditionally defines the USE_THREADS symbol,

and indicates that Perl should be built to use threads.

usevendorprefix (vendorprefix.U):

This variable tells whether the vendorprefix

and consequently other vendor* paths are in use.

usevfork (d_vfork.U):

This variable is set to true when the user accepts to use vfork.

It is set to false when no vfork is available or when the user

explicitely requests not to use vfork.

usrinc (usrinc.U):

This variable holds the path of the include files, which is

usually /usr/include. It is mainly used by other Configure units.

uuname (Loc.U):

This variable is defined but not used by Configure.

The value is a plain '' and is not useful.

uvoformat (perlxvf.U):

This variable contains the format string used for printing

a Perl UV as an unsigned octal integer.

uvsize (perlxv.U):

This variable is the size of a UV in bytes.

uvtype (perlxv.U):

This variable contains the C type used for Perl's UV.

uvuformat (perlxvf.U):

This variable contains the format string used for printing

a Perl UV as an unsigned decimal integer.

uvxformat (perlxvf.U):

This variable contains the format string used for printing

a Perl UV as an unsigned hexadecimal integer in lowercase abcdef.

uvXUformat (perlxvf.U):

This variable contains the format string used for printing

a Perl UV as an unsigned hexadecimal integer in uppercase ABCDEF.

vendorarch (vendorarch.U):

This variable contains the value of the PERL_VENDORARCH symbol.

It may have a ~ on the front.

The standard distribution will put nothing in this directory.

Vendors who distribute perl may wish to place their own

architecture-dependent modules and extensions in this directory with

MakeMaker Makefile.PL INSTALLDIRS=vendor

or equivalent. See INSTALL for details.

vendorarchexp (vendorarch.U):

This variable is the ~name expanded version of vendorarch, so that you

may use it directly in Makefiles or shell scripts.

vendorbin (vendorbin.U):

This variable contains the eventual value of the VENDORBIN symbol.

It may have a ~ on the front.

The standard distribution will put nothing in this directory.

Vendors who distribute perl may wish to place additional

binaries in this directory with

MakeMaker Makefile.PL INSTALLDIRS=vendor

or equivalent. See INSTALL for details.

vendorbinexp (vendorbin.U):

This variable is the ~name expanded version of vendorbin, so that you

may use it directly in Makefiles or shell scripts.

vendorhtml1dir (vendorhtml1dir.U):

This variable contains the name of the directory for html

pages. It may have a ~ on the front.

The standard distribution will put nothing in this directory.

Vendors who distribute perl may wish to place their own

html pages in this directory with

MakeMaker Makefile.PL INSTALLDIRS=vendor

or equivalent. See INSTALL for details.

vendorhtml1direxp (vendorhtml1dir.U):

This variable is the ~name expanded version of vendorhtml1dir, so that you

may use it directly in Makefiles or shell scripts.

vendorhtml3dir (vendorhtml3dir.U):

This variable contains the name of the directory for html

library pages. It may have a ~ on the front.

The standard distribution will put nothing in this directory.

Vendors who distribute perl may wish to place their own

html pages for modules and extensions in this directory with

MakeMaker Makefile.PL INSTALLDIRS=vendor

or equivalent. See INSTALL for details.

vendorhtml3direxp (vendorhtml3dir.U):

This variable is the ~name expanded version of vendorhtml3dir, so that you

may use it directly in Makefiles or shell scripts.

vendorlib (vendorlib.U):

This variable contains the eventual value of the VENDORLIB symbol,

which is the name of the private library for this package.

The standard distribution will put nothing in this directory.

Vendors who distribute perl may wish to place their own

modules in this directory with

MakeMaker Makefile.PL INSTALLDIRS=vendor

or equivalent. See INSTALL for details.

vendorlib_stem (vendorlib.U):

This variable is $vendorlibexp with any trailing version-specific component

removed. The elements in inc_version_list (inc_version_list.U) can

be tacked onto this variable to generate a list of directories to search.

vendorlibexp (vendorlib.U):

This variable is the ~name expanded version of vendorlib, so that you

may use it directly in Makefiles or shell scripts.

vendorman1dir (vendorman1dir.U):

This variable contains the name of the directory for man1

pages. It may have a ~ on the front.

The standard distribution will put nothing in this directory.

Vendors who distribute perl may wish to place their own

man1 pages in this directory with

MakeMaker Makefile.PL INSTALLDIRS=vendor

or equivalent. See INSTALL for details.

vendorman1direxp (vendorman1dir.U):

This variable is the ~name expanded version of vendorman1dir, so that you

may use it directly in Makefiles or shell scripts.

vendorman3dir (vendorman3dir.U):

This variable contains the name of the directory for man3

pages. It may have a ~ on the front.

The standard distribution will put nothing in this directory.

Vendors who distribute perl may wish to place their own

man3 pages in this directory with

MakeMaker Makefile.PL INSTALLDIRS=vendor

or equivalent. See INSTALL for details.

vendorman3direxp (vendorman3dir.U):

This variable is the ~name expanded version of vendorman3dir, so that you

may use it directly in Makefiles or shell scripts.

vendorprefix (vendorprefix.U):

This variable holds the full absolute path of the directory below

which the vendor will install add-on packages.

See INSTALL for usage and examples.

vendorprefixexp (vendorprefix.U):

This variable holds the full absolute path of the directory below

which the vendor will install add-on packages. Derived from vendorprefix.

vendorscript (vendorscript.U):

This variable contains the eventual value of the VENDORSCRIPT symbol.

It may have a ~ on the front.

The standard distribution will put nothing in this directory.

Vendors who distribute perl may wish to place additional

executable scripts in this directory with

MakeMaker Makefile.PL INSTALLDIRS=vendor

or equivalent. See INSTALL for details.

vendorscriptexp (vendorscript.U):

This variable is the ~name expanded version of vendorscript, so that you

may use it directly in Makefiles or shell scripts.

version (patchlevel.U):

The full version number of this package, such as 5.6.1 (or 5_6_1).

This combines revision, patchlevel, and subversion to get the

full version number, including any possible subversions.

This is suitable for use as a directory name, and hence is

filesystem dependent.

version_patchlevel_string (patchlevel.U):

This is a string combining version, subversion and

perl_patchlevel (if perl_patchlevel is non-zero).

It is typically something like

'version 7 subversion 1' or

'version 7 subversion 1 patchlevel 11224'

It is computed here to avoid duplication of code in myconfig.SH

and lib/Config.pm.

versiononly (versiononly.U):

If set, this symbol indicates that only the version-specific

components of a perl installation should be installed.

This may be useful for making a test installation of a new

version without disturbing the existing installation.

Setting versiononly is equivalent to setting installperl's -v option.

In particular, the non-versioned scripts and programs such as

a2p, c2ph, h2xs, pod2*, and perldoc are not installed

(see INSTALL for a more complete list). Nor are the man

pages installed.

Usually, this is undef.

vi (Loc.U):

This variable is defined but not used by Configure.

The value is a plain '' and is not useful.

voidflags (voidflags.U):

This variable contains the eventual value of the VOIDFLAGS symbol,

which indicates how much support of the void type is given by this

compiler. See VOIDFLAGS for more info.

xlibpth (libpth.U):

This variable holds extra path (space-separated) used to find

libraries on this platform, for example CPU-specific libraries

(on multi-CPU platforms) may be listed here.

yacc (yacc.U):

This variable holds the name of the compiler compiler we

want to use in the Makefile. It can be yacc, byacc, or bison -y.

yaccflags (yacc.U):

This variable contains any additional yacc flags desired by the

user. It is up to the Makefile to use this.

zcat (Loc.U):

This variable is defined but not used by Configure.

The value is a plain '' and is not useful.

zip (Loc.U):

This variable is used internally by Configure to determine the

full pathname (if any) of the zip program. After Configure runs,

the value is reset to a plain "zip" and is not useful.