configpm revision 7c478bd95313f5f23a4c958a745db2134aa03244
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn#!./miniperl -w
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallynmy $config_pm = $ARGV[0] || 'lib/Config.pm';
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallynmy $glossary = $ARGV[1] || 'Porting/Glossary';
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn@ARGV = "./config.sh";
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn# list names to put first (and hence lookup fastest)
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn@fast = qw(archname osname osvers prefix libs libpth
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn dynamic_ext static_ext extensions dlsrc so
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn sig_name sig_num cc ccflags cppflags
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn privlibexp archlibexp installprivlib installarchlib
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn sharpbang startsh shsharp
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn);
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn# names of things which may need to have slashes changed to double-colons
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn@extensions = qw(dynamic_ext static_ext extensions known_extensions);
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallynopen CONFIG, ">$config_pm" or die "Can't open $config_pm: $!\n";
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn$myver = sprintf "v%vd", $^V;
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallynprint CONFIG <<'ENDOFBEG_NOQ', <<"ENDOFBEG";
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallynpackage Config;
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallynuse Exporter ();
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn@EXPORT = qw(%Config);
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn@EXPORT_OK = qw(myconfig config_sh config_vars);
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn# Define our own import method to avoid pulling in the full Exporter:
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallynsub import {
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn my $pkg = shift;
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn @_ = @EXPORT unless @_;
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn my @func = grep {$_ ne '%Config'} @_;
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn local $Exporter::ExportLevel = 1;
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn Exporter::import('Config', @func) if @func;
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn return if @func == @_;
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn my $callpkg = caller(0);
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn *{"$callpkg\::Config"} = \%Config;
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn}
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge HallynENDOFBEG_NOQ
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyndie "Perl lib version ($myver) doesn't match executable version (\$])"
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn unless \$^V;
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn\$^V eq $myver
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn or die "Perl lib version ($myver) doesn't match executable version (" .
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn (sprintf "v%vd",\$^V) . ")";
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn# This file was created by configpm when Perl was built. Any changes
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn# made to this file will be lost the next time perl is built.
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge HallynENDOFBEG
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn
13cea07dcdf3658da105f17813b572b3a7787022Serge Hallyn
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn@fast{@fast} = @fast;
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn@extensions{@extensions} = @extensions;
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn@non_v=();
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn@v_fast=();
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn@v_others=();
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn$in_v = 0;
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallynwhile (<>) {
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn next if m:^#!/bin/sh:;
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn # Catch CONFIGDOTSH=true and PERL_VERSION=n line from Configure.
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn s/^(\w+)=(true|\d+)\s*$/$1='$2'\n/;
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn my ($k,$v) = ($1,$2);
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn # grandfather PATCHLEVEL and SUBVERSION and CONFIG
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn if ($k) {
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn if ($k eq 'PERL_VERSION') {
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn push @v_others, "PATCHLEVEL='$v'\n";
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn }
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn elsif ($k eq 'PERL_SUBVERSION') {
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn push @v_others, "SUBVERSION='$v'\n";
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn }
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn elsif ($k eq 'CONFIGDOTSH') {
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn push @v_others, "CONFIG='$v'\n";
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn }
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn }
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn # We can delimit things in config.sh with either ' or ".
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn unless ($in_v or m/^(\w+)=(['"])(.*\n)/){
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn push(@non_v, "#$_"); # not a name='value' line
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn next;
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn }
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn $quote = $2;
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn if ($in_v) { $val .= $_; }
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn else { ($name,$val) = ($1,$3); }
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn $in_v = $val !~ /$quote\n/;
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn next if $in_v;
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn if ($extensions{$name}) { s,/,::,g }
592fd47a6245508b79fe6ac819fe6d3b2c1289beSerge Hallyn if (!$fast{$name}){ push(@v_others, "$name=$quote$val"); next; }
push(@v_fast,"$name=$quote$val");
}
foreach(@non_v){ print CONFIG $_ }
print CONFIG "\n",
"my \$config_sh = <<'!END!';\n",
join("", @v_fast, sort @v_others),
"!END!\n\n";
# copy config summary format from the myconfig.SH script
print CONFIG "my \$summary = <<'!END!';\n";
open(MYCONFIG,"<myconfig.SH") || die "open myconfig.SH failed: $!";
1 while defined($_ = <MYCONFIG>) && !/^Summary of/;
do { print CONFIG $_ } until !defined($_ = <MYCONFIG>) || /^\s*$/;
close(MYCONFIG);
print CONFIG "\n!END!\n", <<'EOT';
my $summary_expanded = 0;
sub myconfig {
return $summary if $summary_expanded;
$summary =~ s{\$(\w+)}
{ my $c = $Config{$1}; defined($c) ? $c : 'undef' }ge;
$summary_expanded = 1;
$summary;
}
EOT
# ----
print CONFIG <<'ENDOFEND';
sub FETCH {
# check for cached value (which may be undef so we use exists not defined)
return $_[0]->{$_[1]} if (exists $_[0]->{$_[1]});
# Search for it in the big string
my($value, $start, $marker, $quote_type);
$quote_type = "'";
# Virtual entries.
if ($_[1] eq 'byteorder') {
# byteorder does exist on its own but we overlay a virtual
# dynamically recomputed value.
my $t = $Config{ivtype};
my $s = $Config{ivsize};
my $f = $t eq 'long' ? 'L!' : $s == 8 ? 'Q': 'I';
if ($s == 4 || $s == 8) {
my $i = 0;
foreach my $c (reverse(2..$s)) { $i |= ord($c); $i <<= 8 }
$i |= ord(1);
$value = join('', unpack('a'x$s, pack($f, $i)));
} else {
$value = '?'x$s;
}
} elsif ($_[1] =~ /^((?:cc|ld)flags|libs(?:wanted)?)_nolargefiles/) {
# These are purely virtual, they do not exist, but need to
# be computed on demand for largefile-incapable extensions.
my $key = "${1}_uselargefiles";
$value = $Config{$1};
my $withlargefiles = $Config{$key};
if ($key =~ /^(?:cc|ld)flags_/) {
$value =~ s/\Q$withlargefiles\E\b//;
} elsif ($key =~ /^libs/) {
my @lflibswanted = split(' ', $Config{libswanted_uselargefiles});
if (@lflibswanted) {
my %lflibswanted;
@lflibswanted{@lflibswanted} = ();
if ($key =~ /^libs_/) {
my @libs = grep { /^-l(.+)/ &&
not exists $lflibswanted{$1} }
split(' ', $Config{libs});
$Config{libs} = join(' ', @libs);
} elsif ($key =~ /^libswanted_/) {
my @libswanted = grep { not exists $lflibswanted{$_} }
split(' ', $Config{libswanted});
$Config{libswanted} = join(' ', @libswanted);
}
}
}
} else {
$marker = "$_[1]=";
# return undef unless (($value) = $config_sh =~ m/^$_[1]='(.*)'\s*$/m);
# Check for the common case, ' delimeted
$start = index($config_sh, "\n$marker$quote_type");
# If that failed, check for " delimited
if ($start == -1) {
$quote_type = '"';
$start = index($config_sh, "\n$marker$quote_type");
}
return undef if ( ($start == -1) && # in case it's first
(substr($config_sh, 0, length($marker)) ne $marker) );
if ($start == -1) {
# It's the very first thing we found. Skip $start forward
# and figure out the quote mark after the =.
$start = length($marker) + 1;
$quote_type = substr($config_sh, $start - 1, 1);
}
else {
$start += length($marker) + 2;
}
$value = substr($config_sh, $start,
index($config_sh, "$quote_type\n", $start) - $start);
}
# If we had a double-quote, we'd better eval it so escape
# sequences and such can be interpolated. Since the incoming
# value is supposed to follow shell rules and not perl rules,
# we escape any perl variable markers
if ($quote_type eq '"') {
$value =~ s/\$/\\\$/g;
$value =~ s/\@/\\\@/g;
eval "\$value = \"$value\"";
}
#$value = sprintf($value) if $quote_type eq '"';
# So we can say "if $Config{'foo'}".
$value = undef if $value eq 'undef';
$_[0]->{$_[1]} = $value; # cache it
return $value;
}
my $prevpos = 0;
sub FIRSTKEY {
$prevpos = 0;
# my($key) = $config_sh =~ m/^(.*?)=/;
substr($config_sh, 0, index($config_sh, '=') );
# $key;
}
sub NEXTKEY {
# Find out how the current key's quoted so we can skip to its end.
my $quote = substr($config_sh, index($config_sh, "=", $prevpos)+1, 1);
my $pos = index($config_sh, qq($quote\n), $prevpos) + 2;
my $len = index($config_sh, "=", $pos) - $pos;
$prevpos = $pos;
$len > 0 ? substr($config_sh, $pos, $len) : undef;
}
sub EXISTS {
# exists($_[0]->{$_[1]}) or $config_sh =~ m/^$_[1]=/m;
exists($_[0]->{$_[1]}) or
index($config_sh, "\n$_[1]='") != -1 or
substr($config_sh, 0, length($_[1])+2) eq "$_[1]='" or
index($config_sh, "\n$_[1]=\"") != -1 or
substr($config_sh, 0, length($_[1])+2) eq "$_[1]=\"" or
$_[1] =~ /^(?:(?:cc|ld)flags|libs(?:wanted)?)_nolargefiles$/;
}
sub STORE { die "\%Config::Config is read-only\n" }
sub DELETE { &STORE }
sub CLEAR { &STORE }
sub config_sh {
$config_sh
}
sub config_re {
my $re = shift;
my @matches = ($config_sh =~ /^$re=.*\n/mg);
@matches ? (print @matches) : print "$re: not found\n";
}
sub config_vars {
foreach(@_){
config_re($_), next if /\W/;
my $v=(exists $Config{$_}) ? $Config{$_} : 'UNKNOWN';
$v='undef' unless defined $v;
print "$_='$v';\n";
}
}
ENDOFEND
if ($^O eq 'os2') {
print CONFIG <<'ENDOFSET';
my %preconfig;
if ($OS2::is_aout) {
my ($value, $v) = $config_sh =~ m/^used_aout='(.*)'\s*$/m;
for (split ' ', $value) {
($v) = $config_sh =~ m/^aout_$_='(.*)'\s*$/m;
$preconfig{$_} = $v eq 'undef' ? undef : $v;
}
}
sub TIEHASH { bless {%preconfig} }
ENDOFSET
} else {
print CONFIG <<'ENDOFSET';
sub TIEHASH { bless {} }
ENDOFSET
}
print CONFIG <<'ENDOFTAIL';
# avoid Config..Exporter..UNIVERSAL search for DESTROY then AUTOLOAD
sub DESTROY { }
tie %Config, 'Config';
1;
__END__
=head1 NAME
Config - access Perl configuration information
=head1 SYNOPSIS
use Config;
if ($Config{'cc'} =~ /gcc/) {
print "built by gcc\n";
}
use Config qw(myconfig config_sh config_vars);
print myconfig();
print config_sh();
config_vars(qw(osname archname));
=head1 DESCRIPTION
The Config module contains all the information that was available to
the C<Configure> program at Perl build time (over 900 values).
Shell variables from the F<config.sh> file (written by Configure) are
stored in the readonly-variable C<%Config>, indexed by their names.
Values stored in config.sh as 'undef' are returned as undefined
values. The perl C<exists> function can be used to check if a
named variable exists.
=over 4
=item myconfig()
Returns a textual summary of the major perl configuration values.
See also C<-V> in L<perlrun/Switches>.
=item config_sh()
Returns the entire perl configuration information in the form of the
original config.sh shell variable assignment script.
=item config_vars(@names)
Prints to STDOUT the values of the named configuration variable. Each is
printed on a separate line in the form:
name='value';
Names which are unknown are output as C<name='UNKNOWN';>.
See also C<-V:name> in L<perlrun/Switches>.
=back
=head1 EXAMPLE
Here's a more sophisticated example of using %Config:
use Config;
use strict;
my %sig_num;
my @sig_name;
unless($Config{sig_name} && $Config{sig_num}) {
die "No sigs?";
} else {
my @names = split ' ', $Config{sig_name};
@sig_num{@names} = split ' ', $Config{sig_num};
foreach (@names) {
$sig_name[$sig_num{$_}] ||= $_;
}
}
print "signal #17 = $sig_name[17]\n";
if ($sig_num{ALRM}) {
print "SIGALRM is $sig_num{ALRM}\n";
}
=head1 WARNING
Because this information is not stored within the perl executable
itself it is possible (but unlikely) that the information does not
relate to the actual perl binary which is being used to access it.
The Config module is installed into the architecture and version
specific library directory ($Config{installarchlib}) and it checks the
perl version number when loaded.
The values stored in config.sh may be either single-quoted or
double-quoted. Double-quoted strings are handy for those cases where you
need to include escape sequences in the strings. To avoid runtime variable
interpolation, any C<$> and C<@> characters are replaced by C<\$> and
C<\@>, respectively. This isn't foolproof, of course, so don't embed C<\$>
or C<\@> in double-quoted strings unless you're willing to deal with the
consequences. (The slashes will end up escaped and the C<$> or C<@> will
trigger variable interpolation)
=head1 GLOSSARY
Most C<Config> variables are determined by the C<Configure> script
on platforms supported by it (which is most UNIX platforms). Some
platforms have custom-made C<Config> variables, and may thus not have
some of the variables described below, or may have extraneous variables
specific to that particular port. See the port specific documentation
in such cases.
ENDOFTAIL
open(GLOS, "<$glossary") or die "Can't open $glossary: $!";
%seen = ();
$text = 0;
$/ = '';
sub process {
s/\A(\w*)\s+\(([\w.]+)\):\s*\n(\t?)/=item C<$1>\n\nFrom F<$2>:\n\n/m;
my $c = substr $1, 0, 1;
unless ($seen{$c}++) {
print CONFIG <<EOF if $text;
=back
EOF
print CONFIG <<EOF;
=head2 $c
=over
EOF
$text = 1;
}
s/n't/n\00t/g; # leave can't, won't etc untouched
s/^\t\s+(.*)/\n\t$1\n/gm; # Indented lines ===> paragraphs
s/^(?<!\n\n)\t(.*)/$1/gm; # Not indented lines ===> text
s{([\'\"])(?=[^\'\"\s]*[./][^\'\"\s]*\1)([^\'\"\s]+)\1}(F<$2>)g; # '.o'
s{([\'\"])([^\'\"\s]+)\1}(C<$2>)g; # "date" command
s{\'([A-Za-z_\- *=/]+)\'}(C<$1>)g; # 'ln -s'
s{
(?<! [\w./<\'\"] ) # Only standalone file names
(?! e \. g \. ) # Not e.g.
(?! \. \. \. ) # Not ...
(?! \d ) # Not 5.004
( [\w./]* [./] [\w./]* ) # Require . or / inside
(?<! \. (?= \s ) ) # Do not include trailing dot
(?! [\w/] ) # Include all of it
}
(F<$1>)xg; # /usr/local
s/((?<=\s)~\w*)/F<$1>/g; # ~name
s/(?<![.<\'\"])\b([A-Z_]{2,})\b(?![\'\"])/C<$1>/g; # UNISTD
s/(?<![.<\'\"])\b(?!the\b)(\w+)\s+macro\b/C<$1> macro/g; # FILE_cnt macro
s/n[\0]t/n't/g; # undo can't, won't damage
}
<GLOS>; # Skip the preamble
while (<GLOS>) {
process;
print CONFIG;
}
print CONFIG <<'ENDOFTAIL';
=back
=head1 NOTE
This module contains a good example of how to use tie to implement a
cache and an example of how to make a tied variable readonly to those
outside of it.
=cut
ENDOFTAIL
close(CONFIG);
close(GLOS);
# Now do some simple tests on the Config.pm file we have created
unshift(@INC,'lib');
require $config_pm;
import Config;
die "$0: $config_pm not valid"
unless $Config{'CONFIGDOTSH'} eq 'true';
die "$0: error processing $config_pm"
if defined($Config{'an impossible name'})
or $Config{'CONFIGDOTSH'} ne 'true' # test cache
;
die "$0: error processing $config_pm"
if eval '$Config{"cc"} = 1'
or eval 'delete $Config{"cc"}'
;
exit 0;