# getopt.m4 serial 31

dnl Copyright (C) 2002-2006, 2008-2010 Free Software Foundation, Inc.

dnl This file is free software; the Free Software Foundation

dnl gives unlimited permission to copy and/or distribute it,

dnl with or without modifications, as long as this notice is preserved.

# Request a POSIX compliant getopt function.

AC_DEFUN([gl_FUNC_GETOPT_POSIX],

[

m4_divert_text([DEFAULTS], [gl_getopt_required=POSIX])

AC_REQUIRE([gl_UNISTD_H_DEFAULTS])

gl_GETOPT_IFELSE([

gl_REPLACE_GETOPT

],

[])

])

# Request a POSIX compliant getopt function with GNU extensions (such as

# options with optional arguments) and the functions getopt_long,

# getopt_long_only.

AC_DEFUN([gl_FUNC_GETOPT_GNU],

[

m4_divert_text([INIT_PREPARE], [gl_getopt_required=GNU])

AC_REQUIRE([gl_FUNC_GETOPT_POSIX])

])

# Request the gnulib implementation of the getopt functions unconditionally.

# argp.m4 uses this.

AC_DEFUN([gl_REPLACE_GETOPT],

[

dnl Arrange for getopt.h to be created.

gl_GETOPT_SUBSTITUTE_HEADER

dnl Arrange for unistd.h to include getopt.h.

GNULIB_UNISTD_H_GETOPT=1

dnl Arrange to compile the getopt implementation.

AC_LIBOBJ([getopt])

AC_LIBOBJ([getopt1])

gl_PREREQ_GETOPT

])

# emacs' configure.in uses this.

AC_DEFUN([gl_GETOPT_IFELSE],

[

AC_REQUIRE([gl_GETOPT_CHECK_HEADERS])

AS_IF([test -n "$gl_replace_getopt"], [$1], [$2])

])

# Determine whether to replace the entire getopt facility.

AC_DEFUN([gl_GETOPT_CHECK_HEADERS],

[

AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles

AC_REQUIRE([AC_PROG_AWK]) dnl for awk that supports ENVIRON

dnl Persuade Solaris <unistd.h> to declare optarg, optind, opterr, optopt.

AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])

gl_CHECK_NEXT_HEADERS([getopt.h])

AC_CHECK_HEADERS_ONCE([getopt.h])

if test $ac_cv_header_getopt_h = yes; then

HAVE_GETOPT_H=1

else

HAVE_GETOPT_H=0

fi

AC_SUBST([HAVE_GETOPT_H])

gl_replace_getopt=

dnl Test whether <getopt.h> is available.

if test -z "$gl_replace_getopt" && test $gl_getopt_required = GNU; then

AC_CHECK_HEADERS([getopt.h], [], [gl_replace_getopt=yes])

fi

dnl Test whether the function getopt_long is available.

if test -z "$gl_replace_getopt" && test $gl_getopt_required = GNU; then

AC_CHECK_FUNCS([getopt_long_only], [], [gl_replace_getopt=yes])

fi

dnl BSD getopt_long uses an incompatible method to reset option processing.

dnl Existence of the variable, in and of itself, is not a reason to replace

dnl getopt, but knowledge of the variable is needed to determine how to

dnl reset and whether a reset reparses the environment.

dnl Solaris supports neither optreset nor optind=0, but keeps no state that

dnl needs a reset beyond setting optind=1; detect Solaris by getopt_clip.

if test -z "$gl_replace_getopt"; then

AC_CHECK_DECLS([optreset], [],

[AC_CHECK_DECLS([getopt_clip], [], [],

[[#include <getopt.h>]])

],

[[#include <getopt.h>]])

fi

dnl mingw's getopt (in libmingwex.a) does weird things when the options

dnl strings starts with '+' and it's not the first call. Some internal state

dnl is left over from earlier calls, and neither setting optind = 0 nor

dnl setting optreset = 1 get rid of this internal state.

dnl POSIX is silent on optind vs. optreset, so we allow either behavior.

dnl POSIX 2008 does not specify leading '+' behavior, but see

dnl http://austingroupbugs.net/view.php?id=191 for a recommendation on

dnl the next version of POSIX. For now, we only guarantee leading '+'

dnl behavior with getopt-gnu.

if test -z "$gl_replace_getopt"; then

AC_CACHE_CHECK([whether getopt is POSIX compatible],

[gl_cv_func_getopt_posix],

[

dnl This test fails on mingw and succeeds on many other platforms.

AC_RUN_IFELSE([AC_LANG_SOURCE([[

#include <unistd.h>

#include <stdlib.h>

#include <string.h>

#if !HAVE_DECL_OPTRESET && !HAVE_DECL_GETOPT_CLIP

# define OPTIND_MIN 0

#else

# define OPTIND_MIN 1

#endif

int

main ()

{

{

int argc = 0;

char *argv[10];

int c;

argv[argc++] = "program";

argv[argc++] = "-a";

argv[argc++] = "foo";

argv[argc++] = "bar";

argv[argc] = NULL;

optind = OPTIND_MIN;

opterr = 0;

c = getopt (argc, argv, "ab");

if (!(c == 'a'))

return 1;

c = getopt (argc, argv, "ab");

if (!(c == -1))

return 2;

if (!(optind == 2))

return 3;

}

/* Some internal state exists at this point. */

{

int argc = 0;

char *argv[10];

int c;

argv[argc++] = "program";

argv[argc++] = "donald";

argv[argc++] = "-p";

argv[argc++] = "billy";

argv[argc++] = "duck";

argv[argc++] = "-a";

argv[argc++] = "bar";

argv[argc] = NULL;

optind = OPTIND_MIN;

opterr = 0;

c = getopt (argc, argv, "+abp:q:");

if (!(c == -1))

return 4;

if (!(strcmp (argv[0], "program") == 0))

return 5;

if (!(strcmp (argv[1], "donald") == 0))

return 6;

if (!(strcmp (argv[2], "-p") == 0))

return 7;

if (!(strcmp (argv[3], "billy") == 0))

return 8;

if (!(strcmp (argv[4], "duck") == 0))

return 9;

if (!(strcmp (argv[5], "-a") == 0))

return 10;

if (!(strcmp (argv[6], "bar") == 0))

return 11;

if (!(optind == 1))

return 12;

}

/* Detect MacOS 10.5, AIX 7.1 bug. */

{

char *argv[3] = { "program", "-ab", NULL };

optind = OPTIND_MIN;

opterr = 0;

if (getopt (2, argv, "ab:") != 'a')

return 13;

if (getopt (2, argv, "ab:") != '?')

return 14;

if (optopt != 'b')

return 15;

if (optind != 2)

return 16;

}

return 0;

}

]])],

[gl_cv_func_getopt_posix=yes], [gl_cv_func_getopt_posix=no],

[case "$host_os" in

mingw*) gl_cv_func_getopt_posix="guessing no";;

darwin* | aix*) gl_cv_func_getopt_posix="guessing no";;

*) gl_cv_func_getopt_posix="guessing yes";;

esac

])

])

case "$gl_cv_func_getopt_posix" in

*no) gl_replace_getopt=yes ;;

esac

fi

if test -z "$gl_replace_getopt" && test $gl_getopt_required = GNU; then

AC_CACHE_CHECK([for working GNU getopt function], [gl_cv_func_getopt_gnu],

[# Even with POSIXLY_CORRECT, the GNU extension of leading '-' in the

# optstring is necessary for programs like m4 that have POSIX-mandated

# semantics for supporting options interspersed with files.

# Also, since getopt_long is a GNU extension, we require optind=0.

# Bash ties 'set -o posix' to a non-exported POSIXLY_CORRECT;

# so take care to revert to the correct (non-)export state.

dnl GNU Coding Standards currently allow awk but not env; besides, env

dnl is ambiguous with environment values that contain newlines.

gl_awk_probe='BEGIN { if ("POSIXLY_CORRECT" in ENVIRON) print "x" }'

case ${POSIXLY_CORRECT+x}`$AWK "$gl_awk_probe" </dev/null` in

xx) gl_had_POSIXLY_CORRECT=exported ;;

x) gl_had_POSIXLY_CORRECT=yes ;;

*) gl_had_POSIXLY_CORRECT= ;;

esac

POSIXLY_CORRECT=1

export POSIXLY_CORRECT

AC_RUN_IFELSE(

[AC_LANG_PROGRAM([[#include <getopt.h>

#include <stddef.h>

#include <string.h>

]], [[

/* This code succeeds on glibc 2.8, OpenBSD 4.0, Cygwin, mingw,

and fails on MacOS X 10.5, AIX 5.2, HP-UX 11, IRIX 6.5,

OSF/1 5.1, Solaris 10. */

{

char *myargv[3];

myargv[0] = "conftest";

myargv[1] = "-+";

myargv[2] = 0;

opterr = 0;

if (getopt (2, myargv, "+a") != '?')

return 1;

}

/* This code succeeds on glibc 2.8, mingw,

and fails on MacOS X 10.5, OpenBSD 4.0, AIX 5.2, HP-UX 11,

IRIX 6.5, OSF/1 5.1, Solaris 10, Cygwin 1.5.x. */

{

char *argv[] = { "program", "-p", "foo", "bar", NULL };

optind = 1;

if (getopt (4, argv, "p::") != 'p')

return 2;

if (optarg != NULL)

return 3;

if (getopt (4, argv, "p::") != -1)

return 4;

if (optind != 2)

return 5;

}

/* This code succeeds on glibc 2.8 and fails on Cygwin 1.7.0. */

{

char *argv[] = { "program", "foo", "-p", NULL };

optind = 0;

if (getopt (3, argv, "-p") != 1)

return 6;

if (getopt (3, argv, "-p") != 'p')

return 7;

}

/* This code fails on glibc 2.11. */

{

char *argv[] = { "program", "-b", "-a", NULL };

optind = opterr = 0;

if (getopt (3, argv, "+:a:b") != 'b')

return 8;

if (getopt (3, argv, "+:a:b") != ':')

return 9;

}

return 0;

]])],

[gl_cv_func_getopt_gnu=yes],

[gl_cv_func_getopt_gnu=no],

[dnl Cross compiling. Guess based on host and declarations.

case $host_os:$ac_cv_have_decl_optreset in

*-gnu*:* | mingw*:*) gl_cv_func_getopt_gnu=no;;

*:yes) gl_cv_func_getopt_gnu=no;;

*) gl_cv_func_getopt_gnu=yes;;

esac

])

case $gl_had_POSIXLY_CORRECT in

exported) ;;

yes) AS_UNSET([POSIXLY_CORRECT]); POSIXLY_CORRECT=1 ;;

*) AS_UNSET([POSIXLY_CORRECT]) ;;

esac

])

if test "$gl_cv_func_getopt_gnu" = "no"; then

gl_replace_getopt=yes

fi

fi

])

# emacs' configure.in uses this.

AC_DEFUN([gl_GETOPT_SUBSTITUTE_HEADER],

[

GETOPT_H=getopt.h

AC_DEFINE([__GETOPT_PREFIX], [[rpl_]],

[Define to rpl_ if the getopt replacement functions and variables

should be used.])

AC_SUBST([GETOPT_H])

])

# Prerequisites of lib/getopt*.

# emacs' configure.in uses this.

AC_DEFUN([gl_PREREQ_GETOPT],

[

AC_CHECK_DECLS_ONCE([getenv])

])