5 # Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
6 # 2002, 2003, 2004, 2005, 2006, 2007 Larry Wall and others.
16 # from the contents of the static files
21 # and from the contents of the Configure-generated file
26 # It will only update Config.pm and Config_heavy.pl if the contents of
27 # either file would be different. Note that *both* files are updated in
28 # this case, since for example an extension makefile that has a dependency
29 # on Config.pm should trigger even if only Config_heavy.pl has changed.
31 sub usage { die <<EOF }
33 --no-glossary don't include Porting/Glossary in lib/Config.pod
34 --chdir=dir change directory before writing files
38 our (%Config, $Config_SH_expanded);
40 my $how_many_common = 22;
42 # commonly used names to precache (and hence lookup fastest)
45 while ($how_many_common--) {
48 /^(\S+):\s*(\d+)$/ or die "Malformed line '$_'";
52 # Post 37589e1eefb1bd62 DynaLoader defaults to reading these at runtime.
53 # Ideally we're redo the data below, but Fotango's build system made it
54 # wonderfully easy to instrument, and no longer exists.
55 $Common{$_} = $_ foreach qw(dlext so);
57 # names of things which may need to have slashes changed to double-colons
58 my %Extensions = map {($_,$_)}
59 qw(dynamic_ext static_ext extensions known_extensions);
61 # The plan is that this information is used by ExtUtils::MakeMaker to generate
62 # Makefile dependencies, rather than hardcoding a list, which has become out
63 # of date. However, currently, MM_Unix.pm and MM_VMS.pm have *different* lists,
64 # *and* descrip_mms.template doesn't actually install all the headers.
65 # The "Unix" list seems to (attempt to) avoid the generated headers, which I'm
66 # not sure is the right thing to do. Also, not certain whether it would be
67 # easier to parse MANIFEST to get these (adding config.h, and potentially
68 # removing others), but for now, stick to a hard coded list.
70 # Could use a map to add ".h", but I suspect that it's easier to use literals,
71 # so that anyone using grep will find them
72 # This is the list from MM_VMS, plus pad.h, parser.h, utf8.h
73 # which it installs. It *doesn't* install perliol.h - FIXME.
74 my @header_files = qw(EXTERN.h INTERN.h XSUB.h av.h config.h cop.h cv.h
75 embed.h embedvar.h form.h gv.h handy.h hv.h hv_func.h intrpvar.h
76 iperlsys.h keywords.h mg.h nostdio.h op.h opcode.h
77 pad.h parser.h patchlevel.h perl.h perlio.h perlsdio.h
78 perlvars.h perly.h pp.h pp_proto.h proto.h
79 regcomp.h regexp.h regnodes.h scope.h sv.h thread.h utf8.h
83 $^O eq 'VMS' ? 'vmsish.h' : qw(dosish.h perliol.h time64.h unixish.h);
85 my $header_files = ' return qw(' . join(' ', sort @header_files) . ');';
86 $header_files =~ s/(?=.{64}) # If line is still overlength
87 (.{1,64})\ # Split at the last convenient space
90 # allowed opts as well as specifies default and initial values
92 'glossary' => 1, # --no-glossary - no glossary file inclusion,
94 'chdir' => '', # --chdir=dir - change directory before writing files
98 # user specified options
101 (map {/^--([\-_\w]+)=(.*)$/} @ARGV),
102 # --opt --no-opt --noopt
103 (map {/^no-?(.*)$/i?($1=>0):($_=>1)} map {/^--([\-_\w]+)$/} @ARGV),
106 my %opts = (%Allowed_Opts, %given_opts);
108 for my $opt (grep {!exists $Allowed_Opts{$_}} keys %given_opts) {
109 warn "option '$opt' is not recognized";
112 @ARGV = grep {!/^--/} @ARGV;
121 chdir $Opts{chdir} or die "$0: could not chdir $Opts{chdir}: $!"
124 my ($Config_SH, $Config_PM, $Config_heavy, $Config_POD);
125 my $Glossary = 'Porting/Glossary';
127 $Config_PM = "lib/Config.pm";
128 $Config_POD = "lib/Config.pod";
129 $Config_SH = "config.sh";
131 ($Config_heavy = $Config_PM) =~ s/\.pm$/_heavy.pl/;
132 die "Can't automatically determine name for Config_heavy.pl from '$Config_PM'"
133 if $Config_heavy eq $Config_PM;
138 my $export_funcs = <<'EOT';
139 my %Export_Cache = (myconfig => 1, config_sh => 1, config_vars => 1,
140 config_re => 1, compile_date => 1, local_patches => 1,
141 bincompat_options => 1, non_bincompat_options => 1,
145 my %export_ok = eval $export_funcs or die;
147 $config_txt .= sprintf << 'EOT', $], $export_funcs;
148 # This file was created by configpm when Perl was built. Any changes
149 # made to this file will be lost the next time perl is built.
151 # for a description of the variables, please have a look at the
152 # Glossary file, as written in the Porting folder, or use the url:
153 # http://perl5.git.perl.org/perl.git/blob/HEAD:/Porting/Glossary
158 our ( %%Config, $VERSION );
162 # Skip @Config::EXPORT because it only contains %%Config, which we special
163 # case below as it's not a function. @Config::EXPORT won't change in the
164 # lifetime of Perl 5.
166 @Config::EXPORT = qw(%%Config);
167 @Config::EXPORT_OK = keys %%Export_Cache;
169 # Need to stub all the functions to make code such as print Config::config_sh
174 $config_txt .= "sub $_;\n" foreach sort keys %export_ok;
176 my $myver = sprintf "%vd", $^V;
178 $config_txt .= sprintf <<'ENDOFBEG', ($myver) x 3;
180 # Define our own import method to avoid pulling in the full Exporter:
183 @_ = @Config::EXPORT unless @_;
185 my @funcs = grep $_ ne '%%Config', @_;
186 my $export_Config = @funcs < @_ ? 1 : 0;
189 my $callpkg = caller(0);
190 foreach my $func (@funcs) {
191 die qq{"$func" is not exported by the Config module\n}
192 unless $Export_Cache{$func};
193 *{$callpkg.'::'.$func} = \&{$func};
196 *{"$callpkg\::Config"} = \%%Config if $export_Config;
200 die "$0: Perl lib version (%s) doesn't match executable '$^X' version ($])"
204 or die sprintf "%%s: Perl lib version (%s) doesn't match executable '$^X' version (%%vd)", $0, $^V;
215 # These variables were set in older versions of Perl, but are no longer needed
216 # by the core. However, some CPAN modules may rely on them; in particular, Tk
217 # (at least up to version 804.034) fails to build without them. We force them
218 # to be emitted to Config_heavy.pl for backcompat with such modules (and we may
219 # find that this set needs to be extended in future). See RT#132347.
220 my @v_forced = map "$_\n", split /\n+/, <<'EOT';
232 open(CONFIG_SH, '<', $Config_SH) || die "Can't open $Config_SH: $!";
233 while (<CONFIG_SH>) {
234 next if m:^#!/bin/sh:;
236 # Catch PERL_CONFIG_SH=true and PERL_VERSION=n line from Configure.
237 s/^(\w+)=(true|\d+)\s*$/$1='$2'\n/ or m/^(\w+)='(.*)'$/;
238 my($k, $v) = ($1, $2);
240 # grandfather PATCHLEVEL and SUBVERSION and CONFIG
242 if ($k eq 'PERL_VERSION') {
243 push @v_others, "PATCHLEVEL='$v'\n";
245 elsif ($k eq 'PERL_SUBVERSION') {
246 push @v_others, "SUBVERSION='$v'\n";
248 elsif ($k eq 'PERL_CONFIG_SH') {
249 push @v_others, "CONFIG='$v'\n";
253 # We can delimit things in config.sh with either ' or ".
254 unless ($in_v or m/^(\w+)=(['"])(.*\n)/){
255 push(@non_v, "#$_"); # not a name='value' line
263 ($name,$val) = ($1,$3);
265 $val =~ s{^(['"]?+).*\bccache\s+}{$1};
268 $in_v = $val !~ /$quote\n/;
271 s,/,::,g if $Extensions{$name};
273 $val =~ s/$quote\n?\z//;
275 my $line = "$name=$quote$val$quote\n";
276 push(@v_others, $line);
277 $seen_quotes{$quote}++;
282 # This is somewhat grim, but I want the code for parsing config.sh here and
283 # now so that I can expand $Config{ivsize} and $Config{ivtype}
285 my $fetch_string = <<'EOT';
287 # Search for it in the big string
289 my($self, $key) = @_;
293 if ($seen_quotes{'"'}) {
294 # We need the full ' and " code
296 $fetch_string .= <<'EOT';
297 return undef unless my ($quote_type, $value) = $Config_SH_expanded =~ /\n$key=(['"])(.*?)\1\n/s;
299 # If we had a double-quote, we'd better eval it so escape
300 # sequences and such can be interpolated. Since the incoming
301 # value is supposed to follow shell rules and not perl rules,
302 # we escape any perl variable markers
304 # Historically, since " 'support' was added in change 1409, the
305 # interpolation was done before the undef. Stick to this arguably buggy
306 # behaviour as we're refactoring.
307 if ($quote_type eq '"') {
308 $value =~ s/\$/\\\$/g;
309 $value =~ s/\@/\\\@/g;
310 eval "\$value = \"$value\"";
313 # So we can say "if $Config{'foo'}".
314 $self->{$key} = $value eq 'undef' ? undef : $value; # cache it
319 # We only have ' delimited.
321 $fetch_string .= <<'EOT';
322 return undef unless $Config_SH_expanded =~ /\n$key=\'(.*?)\'\n/s;
323 # So we can say "if $Config{'foo'}".
324 $self->{$key} = $1 eq 'undef' ? undef : $1;
333 # Calculation for the keys for byteorder
334 # This is somewhat grim, but I need to run fetch_string here.
335 $Config_SH_expanded = join "\n", '', @v_others;
337 my $t = fetch_string ({}, 'ivtype');
338 my $s = fetch_string ({}, 'ivsize');
340 # byteorder does exist on its own but we overlay a virtual
341 # dynamically recomputed value.
343 # However, ivtype and ivsize will not vary for sane fat binaries
345 my $f = $t eq 'long' ? 'L!' : $s == 8 ? 'Q': 'I';
348 if ($s == 4 || $s == 8) {
349 my $list = join ',', reverse(1..$s-1);
351 $byteorder_code = <<"EOT";
354 foreach my \$c ($list) { \$i <<= 8; \$i |= ord(\$c); }
355 our \$byteorder = join('', unpack('$format', pack('$f', \$i)));
358 $byteorder_code = "our \$byteorder = '?'x$s;\n";
363 if (fetch_string({},'userelocatableinc')) {
364 foreach my $what (qw(prefixexp
413 installvendorhtml1dir
414 installvendorhtml3dir
420 push @need_relocation, $what if fetch_string({}, $what) =~ m!^\.\.\./!;
425 @need_relocation{@need_relocation} = @need_relocation;
427 # This can have .../ anywhere:
428 if (fetch_string({}, 'otherlibdirs') =~ m!\.\.\./!) {
429 $need_relocation{otherlibdirs} = 'otherlibdirs';
432 my $relocation_code = <<'EOT';
436 return $libdir unless $libdir =~ s!^\.\.\./!!;
438 if ($prefix =~ s!/[^/]*$!!) {
439 while ($libdir =~ m!^\.\./!) {
440 # Loop while $libdir starts "../" and $prefix still has a trailing
442 last unless $prefix =~ s!/([^/]+)$!!;
443 # but bail out if the directory we picked off the end of $prefix is .
445 if ($1 eq '.' or $1 eq '..') {
446 # Undo! This should be rare, hence code it this way rather than a
447 # check each time before the s!!! above.
448 $prefix = "$prefix/$1";
451 # Remove that leading ../ and loop again
452 substr ($libdir, 0, 3, '');
454 $libdir = "$prefix/$libdir";
460 my $osname = fetch_string({}, 'osname');
461 my $from = $osname eq 'VMS' ? 'PERLSHR image' : 'binary (from libperl)';
462 my $env_cygwin = $osname eq 'cygwin'
463 ? 'push @env, "CYGWIN=\"$ENV{CYGWIN}\"" if $ENV{CYGWIN};' . "\n" : "";
465 $heavy_txt .= sprintf <<'ENDOFBEG', $osname, $osname, $from, $osname, $env_cygwin;
466 # This file was created by configpm when Perl was built. Any changes
467 # made to this file will be lost the next time perl is built.
474 sub bincompat_options {
475 return split ' ', (Internals::V())[0];
478 sub non_bincompat_options {
479 return split ' ', (Internals::V())[1];
483 return (Internals::V())[2]
487 my (undef, undef, undef, @patches) = Internals::V();
492 die "Perl lib was built for '%s' but is being run on '$^O'"
495 my ($bincompat, $non_bincompat, $date, @patches) = Internals::V();
497 my @opts = sort split ' ', "$bincompat $non_bincompat";
499 print Config::myconfig();
500 print "\nCharacteristics of this %s: \n";
502 print " Compile-time options:\n";
503 print " $_\n" for @opts;
506 print " Locally applied patches:\n";
507 print " $_\n" foreach @patches;
510 print " Built under %s\n";
512 print " $date\n" if defined $date;
514 my @env = map { "$_=\"$ENV{$_}\"" } sort grep {/^PERL/} keys %%ENV;
518 print " $_\n" foreach @env;
521 print " $_\n" foreach @INC;
527 $heavy_txt .= $header_files . "\n}\n\n";
529 if (%need_relocation) {
530 my $relocations_in_common;
531 # otherlibdirs only features in the hash
532 foreach (keys %need_relocation) {
533 $relocations_in_common++ if $Common{$_};
535 if ($relocations_in_common) {
536 $config_txt .= $relocation_code;
538 $heavy_txt .= $relocation_code;
542 $heavy_txt .= join('', @non_v) . "\n";
544 # copy config summary format from the myconfig.SH script
545 $heavy_txt .= "our \$summary = <<'!END!';\n";
546 open(MYCONFIG,'<','myconfig.SH') || die "open myconfig.SH failed: $!";
547 1 while defined($_ = <MYCONFIG>) && !/^Summary of/;
548 do { $heavy_txt .= $_ } until !defined($_ = <MYCONFIG>) || /^\s*$/;
551 $heavy_txt .= "\n!END!\n" . <<'EOT';
552 my $summary_expanded;
555 return $summary_expanded if $summary_expanded;
556 ($summary_expanded = $summary) =~ s{\$(\w+)}
559 if ($1 eq 'git_ancestor_line') {
560 if ($Config::Config{git_ancestor}) {
561 $c= "\n Ancestor: $Config::Config{git_ancestor}";
566 $c = $Config::Config{$1};
568 defined($c) ? $c : 'undef'
576 #proper lexicographical order of the keys
578 $heavy_txt .= join('',
580 sort {$a->[0] cmp $b->[0] }
581 grep { !$seen_var{ $_->[0] }++ }
583 /^([^=]+)/ ? [ $1, $_ ]
584 : [ $_, $_ ] # shouldnt happen
585 } @v_others, @v_forced
588 # Only need the dynamic byteorder code in Config.pm if 'byteorder' is one of
590 if ($Common{byteorder}) {
591 $config_txt .= $byteorder_code;
593 $heavy_txt .= $byteorder_code;
596 if (@need_relocation) {
597 $heavy_txt .= 'foreach my $what (qw(' . join (' ', @need_relocation) .
599 s/^($what=)(['"])(.*?)\2/$1 . $2 . relocate_inc($3) . $2/me;
602 # Currently it only makes sense to do the ... relocation on Unix, so there's
603 # no need to emulate the "which separator for this platform" logic in perl.c -
604 # ':' will always be applicable
605 if ($need_relocation{otherlibdirs}) {
606 $heavy_txt .= << 'EOT';
607 s{^(otherlibdirs=)(['"])(.*?)\2}
608 {$1 . $2 . join ':', map {relocate_inc($_)} split ':', $3 . $2}me;
613 $heavy_txt .= <<'EOT';
614 s/(byteorder=)(['"]).*?\2/$1$2$Config::byteorder$2/m;
616 my $config_sh_len = length $_;
618 our $Config_SH_expanded = "\n$_" . << 'EOVIRTUAL';
621 foreach my $prefix (qw(ccflags ldflags)) {
622 my $value = fetch_string ({}, $prefix);
623 my $withlargefiles = fetch_string ({}, $prefix . "_uselargefiles");
624 if (defined $withlargefiles) {
625 $value =~ s/\Q$withlargefiles\E\b//;
626 $heavy_txt .= "${prefix}_nolargefiles='$value'\n";
630 foreach my $prefix (qw(libs libswanted)) {
631 my $value = fetch_string ({}, $prefix);
632 my $withlf = fetch_string ({}, 'libswanted_uselargefiles');
633 next unless defined $withlf;
635 = split(' ', fetch_string ({}, 'libswanted_uselargefiles'));
638 @lflibswanted{@lflibswanted} = ();
639 if ($prefix eq 'libs') {
640 my @libs = grep { /^-l(.+)/ &&
641 not exists $lflibswanted{$1} }
642 split(' ', fetch_string ({}, 'libs'));
643 $value = join(' ', @libs);
645 my @libswanted = grep { not exists $lflibswanted{$_} }
646 split(' ', fetch_string ({}, 'libswanted'));
647 $value = join(' ', @libswanted);
650 $heavy_txt .= "${prefix}_nolargefiles='$value'\n";
653 if (open(my $fh, '<', 'cflags')) {
657 if (/^warn="(.+)"$/) {
659 } elsif (/^stdflags="(.+)"$/) {
663 if (defined $ccwarnflags) {
664 $heavy_txt .= "ccwarnflags='$ccwarnflags'\n";
666 if (defined $ccstdflags) {
667 $heavy_txt .= "ccstdflags='$ccstdflags'\n";
671 $heavy_txt .= "EOVIRTUAL\n";
673 $heavy_txt .= <<'ENDOFGIT';
675 # do not have hairy conniptions if this isnt available
676 require 'Config_git.pl';
677 $Config_SH_expanded .= $Config::Git_Data;
679 } or warn "Warning: failed to load Config_git.pl, something strange about this perl...\n";
682 $heavy_txt .= $fetch_string;
684 $config_txt .= <<'ENDOFEND';
687 my($self, $key) = @_;
689 # check for cached value (which may be undef so we use exists not defined)
690 return exists $self->{$key} ? $self->{$key} : $self->fetch_string($key);
695 $heavy_txt .= <<'ENDOFEND';
701 substr($Config_SH_expanded, 1, index($Config_SH_expanded, '=') - 1 );
706 if ($seen_quotes{'"'}) {
707 $heavy_txt .= <<'ENDOFEND';
708 # Find out how the current key's quoted so we can skip to its end.
709 my $quote = substr($Config_SH_expanded,
710 index($Config_SH_expanded, "=", $prevpos)+1, 1);
711 my $pos = index($Config_SH_expanded, qq($quote\n), $prevpos) + 2;
714 # Just ' quotes, so it's much easier.
715 $heavy_txt .= <<'ENDOFEND';
716 my $pos = index($Config_SH_expanded, qq('\n), $prevpos) + 2;
719 $heavy_txt .= <<'ENDOFEND';
720 my $len = index($Config_SH_expanded, "=", $pos) - $pos;
722 $len > 0 ? substr($Config_SH_expanded, $pos, $len) : undef;
726 return 1 if exists($_[0]->{$_[1]});
728 return(index($Config_SH_expanded, "\n$_[1]='") != -1
730 if ($seen_quotes{'"'}) {
731 $heavy_txt .= <<'ENDOFEND';
732 or index($Config_SH_expanded, "\n$_[1]=\"") != -1
735 $heavy_txt .= <<'ENDOFEND';
739 sub STORE { die "\%Config::Config is read-only\n" }
740 *DELETE = *CLEAR = \*STORE; # Typeglob aliasing uses less space
743 substr $Config_SH_expanded, 1, $config_sh_len;
748 return map { chomp; $_ } grep eval{ /^(?:$re)=/ }, split /^/,
753 # implements -V:cfgvar option (see perlrun -V:)
755 # find optional leading, trailing colons; and query-spec
756 my ($notag,$qry,$lncont) = m/^(:)?(.*?)(:)?$/; # flags fore and aft,
757 # map colon-flags to print decorations
758 my $prfx = $notag ? '': "$qry="; # tag-prefix for print
759 my $lnend = $lncont ? ' ' : ";\n"; # line ending for print
761 # all config-vars are by definition \w only, any \W means regex
763 my @matches = config_re($qry);
764 print map "$_$lnend", @matches ? @matches : "$qry: not found" if !$notag;
765 print map { s/\w+=//; "$_$lnend" } @matches ? @matches : "$qry: not found" if $notag;
767 my $v = (exists $Config::Config{$qry}) ? $Config::Config{$qry}
769 $v = 'undef' unless defined $v;
770 print "${prfx}'${v}'$lnend";
775 # Called by the real AUTOLOAD
778 goto \&$Config::AUTOLOAD;
785 $config_txt .= <<'ENDOFSET';
788 my ($value, $v) = $Config_SH_expanded =~ m/^used_aout='(.*)'\s*$/m;
789 for (split ' ', $value) {
790 ($v) = $Config_SH_expanded =~ m/^aout_$_='(.*)'\s*$/m;
791 $preconfig{$_} = $v eq 'undef' ? undef : $v;
794 $preconfig{d_fork} = undef unless $OS2::can_fork; # Some funny cases can't
795 sub TIEHASH { bless {%preconfig} }
797 # Extract the name of the DLL from the makefile to avoid duplication
798 my ($f) = grep -r, qw(GNUMakefile Makefile);
800 if (open my $fh, '<', $f) {
802 $dll = $1, last if /^PERL_DLL_BASE\s*=\s*(\S*)\s*$/;
805 $config_txt .= <<ENDOFSET if $dll;
806 \$preconfig{dll_name} = '$dll';
809 $config_txt .= <<'ENDOFSET';
816 foreach my $key (keys %Common) {
817 my $value = fetch_string ({}, $key);
818 # Is it safe on the LHS of => ?
819 my $qkey = $key =~ /^[A-Za-z_][A-Za-z0-9_]*$/ ? $key : "'$key'";
820 if (defined $value) {
821 # Quote things for a '' string
822 $value =~ s!\\!\\\\!g;
825 if ($key eq 'otherlibdirs') {
826 $value = "join (':', map {relocate_inc(\$_)} split (':', $value))";
827 } elsif ($need_relocation{$key}) {
828 $value = "relocate_inc($value)";
833 $Common{$key} = "$qkey => $value";
836 if ($Common{byteorder}) {
837 $Common{byteorder} = 'byteorder => $byteorder';
839 my $fast_config = join '', map { " $_,\n" } sort values %Common;
841 # Sanity check needed to stop an infinite loop if Config_heavy.pl fails to
842 # define &launcher for some reason (eg it got truncated)
843 $config_txt .= sprintf <<'ENDOFTIE', $fast_config;
848 require 'Config_heavy.pl';
849 goto \&launcher unless $Config::AUTOLOAD =~ /launcher$/;
850 die "&Config::AUTOLOAD failed on $Config::AUTOLOAD";
853 # tie returns the object, so the value returned to require will be true.
854 tie %%Config, 'Config', {
859 open(CONFIG_POD, '>', $Config_POD) or die "Can't open $Config_POD: $!";
860 print CONFIG_POD <<'ENDOFTAIL';
863 Config - access Perl configuration information
868 if ($Config{usethreads}) {
869 print "has thread support\n"
872 use Config qw(myconfig config_sh config_vars config_re);
880 config_vars(qw(osname archname));
885 The Config module contains all the information that was available to
886 the C<Configure> program at Perl build time (over 900 values).
888 Shell variables from the F<config.sh> file (written by Configure) are
889 stored in the readonly-variable C<%Config>, indexed by their names.
891 Values stored in config.sh as 'undef' are returned as undefined
892 values. The perl C<exists> function can be used to check if a
893 named variable exists.
895 For a description of the variables, please have a look at the
896 Glossary file, as written in the Porting folder, or use the url:
897 http://perl5.git.perl.org/perl.git/blob/HEAD:/Porting/Glossary
903 Returns a textual summary of the major perl configuration values.
904 See also C<-V> in L<perlrun/Command Switches>.
908 Returns the entire perl configuration information in the form of the
909 original config.sh shell variable assignment script.
911 =item config_re($regex)
913 Like config_sh() but returns, as a list, only the config entries who's
914 names match the $regex.
916 =item config_vars(@names)
918 Prints to STDOUT the values of the named configuration variable. Each is
919 printed on a separate line in the form:
923 Names which are unknown are output as C<name='UNKNOWN';>.
924 See also C<-V:name> in L<perlrun/Command Switches>.
926 =item bincompat_options()
928 Returns a list of C pre-processor options used when compiling this F<perl>
929 binary, which affect its binary compatibility with extensions.
930 C<bincompat_options()> and C<non_bincompat_options()> are shown together in
931 the output of C<perl -V> as I<Compile-time options>.
933 =item non_bincompat_options()
935 Returns a list of C pre-processor options used when compiling this F<perl>
936 binary, which do not affect binary compatibility with extensions.
940 Returns the compile date (as a string), equivalent to what is shown by
943 =item local_patches()
945 Returns a list of the names of locally applied patches, equivalent to what
946 is shown by C<perl -V>.
950 Returns a list of the header files that should be used as dependencies for
951 XS code, for this version of Perl on this platform.
957 Here's a more sophisticated example of using %Config:
964 unless($Config{sig_name} && $Config{sig_num}) {
967 my @names = split ' ', $Config{sig_name};
968 @sig_num{@names} = split ' ', $Config{sig_num};
970 $sig_name[$sig_num{$_}] ||= $_;
974 print "signal #17 = $sig_name[17]\n";
975 if ($sig_num{ALRM}) {
976 print "SIGALRM is $sig_num{ALRM}\n";
981 Because this information is not stored within the perl executable
982 itself it is possible (but unlikely) that the information does not
983 relate to the actual perl binary which is being used to access it.
985 The Config module is installed into the architecture and version
986 specific library directory ($Config{installarchlib}) and it checks the
987 perl version number when loaded.
989 The values stored in config.sh may be either single-quoted or
990 double-quoted. Double-quoted strings are handy for those cases where you
991 need to include escape sequences in the strings. To avoid runtime variable
992 interpolation, any C<$> and C<@> characters are replaced by C<\$> and
993 C<\@>, respectively. This isn't foolproof, of course, so don't embed C<\$>
994 or C<\@> in double-quoted strings unless you're willing to deal with the
995 consequences. (The slashes will end up escaped and the C<$> or C<@> will
996 trigger variable interpolation)
1000 Most C<Config> variables are determined by the C<Configure> script
1001 on platforms supported by it (which is most UNIX platforms). Some
1002 platforms have custom-made C<Config> variables, and may thus not have
1003 some of the variables described below, or may have extraneous variables
1004 specific to that particular port. See the port specific documentation
1011 if ($Opts{glossary}) {
1012 open(GLOS, '<', $Glossary) or die "Can't open $Glossary: $!";
1020 if (s/\A(\w*)\s+\(([\w.]+)\):\s*\n(\t?)/=item C<$1>\n\nFrom F<$2>:\n\n/m) {
1021 my $c = substr $1, 0, 1;
1022 unless ($seen{$c}++) {
1023 print CONFIG_POD <<EOF if $text;
1029 print CONFIG_POD <<EOF;
1040 elsif (!$text || !/\A\t/) {
1041 warn "Expected a Configure variable header",
1042 ($text ? " or another paragraph of description" : () ),
1043 ", instead we got:\n$_";
1046 s/n't/n\00t/g; # leave can't, won't etc untouched
1047 s/^\t\s+(.*)/\n$1/gm; # Indented lines ===> new paragraph
1048 s/^(?<!\n\n)\t(.*)/$1/gm; # Not indented lines ===> text
1049 s{([\'\"])(?=[^\'\"\s]*[./][^\'\"\s]*\1)([^\'\"\s]+)\1}(F<$2>)g; # '.o'
1050 s{([\'\"])([^\'\"\s]+)\1}(C<$2>)g; # "date" command
1051 s{\'([A-Za-z_\- *=/]+)\'}(C<$1>)g; # 'ln -s'
1053 (?<! [\w./<\'\"\$] ) # Only standalone file names
1054 (?! e \. g \. ) # Not e.g.
1055 (?! \. \. \. ) # Not ...
1056 (?! \d ) # Not 5.004
1057 (?! read/ ) # Not read/write
1058 (?! etc\. ) # Not etc.
1061 \$ ? # Allow leading $
1062 [\w./]* [./] [\w./]* # Require . or / inside
1064 (?<! \. (?= [\s)] ) ) # Do not include trailing dot
1065 (?! [\w/] ) # Include all of it
1067 (F<$1>)xg; # /usr/local
1068 s/((?<=\s)~\w*)/F<$1>/g; # ~name
1069 s/(?<![.<\'\"])\b([A-Z_]{2,})\b(?![\'\"])/C<$1>/g; # UNISTD
1070 s/(?<![.<\'\"])\b(?!the\b)(\w+)\s+macro\b/C<$1> macro/g; # FILE_cnt macro
1071 s/n[\0]t/n't/g; # undo can't, won't damage
1074 if ($Opts{glossary}) {
1075 <GLOS>; # Skip the "DO NOT EDIT"
1076 <GLOS>; # Skip the preamble
1082 die "Errors encountered while processing $Glossary. ",
1083 "Header lines are expected to be of the form:\n",
1085 "Maybe there is a malformed header?\n",
1090 print CONFIG_POD <<'ENDOFTAIL';
1096 Information on the git commit from which the current perl binary was compiled
1097 can be found in the variable C<$Config::Git_Data>. The variable is a
1098 structured string that looks something like this:
1100 git_commit_id='ea0c2dbd5f5ac6845ecc7ec6696415bf8e27bd52'
1101 git_describe='GitLive-blead-1076-gea0c2db'
1102 git_branch='smartmatch'
1103 git_uncommitted_changes=''
1104 git_commit_id_title='Commit id:'
1105 git_commit_date='2009-05-09 17:47:31 +0200'
1107 Its format is not guaranteed not to change over time.
1111 This module contains a good example of how to use tie to implement a
1112 cache and an example of how to make a tied variable readonly to those
1119 close(GLOS) if $Opts{glossary};
1121 print "written $Config_POD\n";
1123 my $orig_config_txt = "";
1124 my $orig_heavy_txt = "";
1128 $orig_config_txt = <$fh> if open $fh, "<", $Config_PM;
1129 $orig_heavy_txt = <$fh> if open $fh, "<", $Config_heavy;
1132 if ($orig_config_txt ne $config_txt or $orig_heavy_txt ne $heavy_txt) {
1133 open CONFIG, ">", $Config_PM or die "Can't open $Config_PM: $!\n";
1134 open CONFIG_HEAVY, ">", $Config_heavy or die "Can't open $Config_heavy: $!\n";
1135 print CONFIG $config_txt;
1136 print CONFIG_HEAVY $heavy_txt;
1137 close(CONFIG_HEAVY);
1139 print "updated $Config_PM\n";
1140 print "updated $Config_heavy\n";
1143 # Now do some simple tests on the Config.pm file we have created
1144 unshift(@INC,'lib');
1146 require $Config_heavy;
1149 die "$0: $Config_PM not valid"
1150 unless $Config{'PERL_CONFIG_SH'} eq 'true';
1152 die "$0: error processing $Config_PM"
1153 if defined($Config{'an impossible name'})
1154 or $Config{'PERL_CONFIG_SH'} ne 'true' # test cache
1157 die "$0: error processing $Config_PM"
1158 if eval '$Config{"cc"} = 1'
1159 or eval 'delete $Config{"cc"}'
1164 # Popularity of various entries in %Config, based on a large build and test
1165 # run of code in the Fotango build system:
1183 inc_version_list: 783
1186 usevendorprefix: 642
1207 installsiteman1dir: 489
1208 installsiteman3dir: 489
1209 installvendorman1dir: 489
1210 installvendorman3dir: 489
1214 installsitearch: 344
1219 installprefixexp: 336
1222 installvendorarch: 336
1223 installvendorbin: 336
1224 installvendorlib: 336