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 # https://github.com/Perl/perl5/blob/blead/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: $!";
860 print CONFIG_POD <<'ENDOFTAIL';
863 =for comment Generated by configpm. Any changes made here will be lost!
865 Config - access Perl configuration information
870 if ($Config{usethreads}) {
871 print "has thread support\n"
874 use Config qw(myconfig config_sh config_vars config_re);
882 config_vars(qw(osname archname));
887 The Config module contains all the information that was available to
888 the C<Configure> program at Perl build time (over 900 values).
890 Shell variables from the F<config.sh> file (written by Configure) are
891 stored in the readonly-variable C<%Config>, indexed by their names.
893 Values stored in config.sh as 'undef' are returned as undefined
894 values. The perl C<exists> function can be used to check if a
895 named variable exists.
897 For a description of the variables, please have a look at the
898 Glossary file, as written in the Porting folder, or use the url:
899 https://github.com/Perl/perl5/blob/blead/Porting/Glossary
905 Returns a textual summary of the major perl configuration values.
906 See also C<-V> in L<perlrun/Command Switches>.
910 Returns the entire perl configuration information in the form of the
911 original config.sh shell variable assignment script.
913 =item config_re($regex)
915 Like config_sh() but returns, as a list, only the config entries who's
916 names match the $regex.
918 =item config_vars(@names)
920 Prints to STDOUT the values of the named configuration variable. Each is
921 printed on a separate line in the form:
925 Names which are unknown are output as C<name='UNKNOWN';>.
926 See also C<-V:name> in L<perlrun/Command Switches>.
928 =item bincompat_options()
930 Returns a list of C pre-processor options used when compiling this F<perl>
931 binary, which affect its binary compatibility with extensions.
932 C<bincompat_options()> and C<non_bincompat_options()> are shown together in
933 the output of C<perl -V> as I<Compile-time options>.
935 =item non_bincompat_options()
937 Returns a list of C pre-processor options used when compiling this F<perl>
938 binary, which do not affect binary compatibility with extensions.
942 Returns the compile date (as a string), equivalent to what is shown by
945 =item local_patches()
947 Returns a list of the names of locally applied patches, equivalent to what
948 is shown by C<perl -V>.
952 Returns a list of the header files that should be used as dependencies for
953 XS code, for this version of Perl on this platform.
959 Here's a more sophisticated example of using %Config:
966 unless($Config{sig_name} && $Config{sig_num}) {
969 my @names = split ' ', $Config{sig_name};
970 @sig_num{@names} = split ' ', $Config{sig_num};
972 $sig_name[$sig_num{$_}] ||= $_;
976 print "signal #17 = $sig_name[17]\n";
977 if ($sig_num{ALRM}) {
978 print "SIGALRM is $sig_num{ALRM}\n";
983 Because this information is not stored within the perl executable
984 itself it is possible (but unlikely) that the information does not
985 relate to the actual perl binary which is being used to access it.
987 The Config module is installed into the architecture and version
988 specific library directory ($Config{installarchlib}) and it checks the
989 perl version number when loaded.
991 The values stored in config.sh may be either single-quoted or
992 double-quoted. Double-quoted strings are handy for those cases where you
993 need to include escape sequences in the strings. To avoid runtime variable
994 interpolation, any C<$> and C<@> characters are replaced by C<\$> and
995 C<\@>, respectively. This isn't foolproof, of course, so don't embed C<\$>
996 or C<\@> in double-quoted strings unless you're willing to deal with the
997 consequences. (The slashes will end up escaped and the C<$> or C<@> will
998 trigger variable interpolation)
1002 Most C<Config> variables are determined by the C<Configure> script
1003 on platforms supported by it (which is most UNIX platforms). Some
1004 platforms have custom-made C<Config> variables, and may thus not have
1005 some of the variables described below, or may have extraneous variables
1006 specific to that particular port. See the port specific documentation
1013 if ($Opts{glossary}) {
1014 open(GLOS, '<', $Glossary) or die "Can't open $Glossary: $!";
1022 if (s/\A(\w*)\s+\(([\w.]+)\):\s*\n(\t?)/=item C<$1>\n\nFrom F<$2>:\n\n/m) {
1023 my $c = substr $1, 0, 1;
1024 unless ($seen{$c}++) {
1025 print CONFIG_POD <<EOF if $text;
1029 print CONFIG_POD <<EOF;
1038 elsif (!$text || !/\A\t/) {
1039 warn "Expected a Configure variable header",
1040 ($text ? " or another paragraph of description" : () ),
1041 ", instead we got:\n$_";
1044 s/n't/n\00t/g; # leave can't, won't etc untouched
1045 s/^\t\s+(.*)/\n$1/gm; # Indented lines ===> new paragraph
1046 s/^(?<!\n\n)\t(.*)/$1/gm; # Not indented lines ===> text
1047 s{([\'\"])(?=[^\'\"\s]*[./][^\'\"\s]*\1)([^\'\"\s]+)\1}(F<$2>)g; # '.o'
1048 s{([\'\"])([^\'\"\s]+)\1}(C<$2>)g; # "date" command
1049 s{\'([A-Za-z_\- *=/]+)\'}(C<$1>)g; # 'ln -s'
1051 (?<! [\w./<\'\"\$] ) # Only standalone file names
1052 (?! e \. g \. ) # Not e.g.
1053 (?! \. \. \. ) # Not ...
1054 (?! \d ) # Not 5.004
1055 (?! read/ ) # Not read/write
1056 (?! etc\. ) # Not etc.
1059 \$ ? # Allow leading $
1060 [\w./]* [./] [\w./]* # Require . or / inside
1062 (?<! \. (?= [\s)] ) ) # Do not include trailing dot
1063 (?! [\w/] ) # Include all of it
1065 (F<$1>)xg; # /usr/local
1066 s/((?<=\s)~\w*)/F<$1>/g; # ~name
1067 s/(?<![.<\'\"])\b([A-Z_]{2,})\b(?![\'\"])/C<$1>/g; # UNISTD
1068 s/(?<![.<\'\"])\b(?!the\b)(\w+)\s+macro\b/C<$1> macro/g; # FILE_cnt macro
1069 s/n[\0]t/n't/g; # undo can't, won't damage
1072 if ($Opts{glossary}) {
1073 <GLOS>; # Skip the "DO NOT EDIT"
1074 <GLOS>; # Skip the preamble
1080 die "Errors encountered while processing $Glossary. ",
1081 "Header lines are expected to be of the form:\n",
1083 "Maybe there is a malformed header?\n",
1088 print CONFIG_POD <<'ENDOFTAIL';
1094 Information on the git commit from which the current perl binary was compiled
1095 can be found in the variable C<$Config::Git_Data>. The variable is a
1096 structured string that looks something like this:
1098 git_commit_id='ea0c2dbd5f5ac6845ecc7ec6696415bf8e27bd52'
1099 git_describe='GitLive-blead-1076-gea0c2db'
1100 git_branch='smartmatch'
1101 git_uncommitted_changes=''
1102 git_commit_id_title='Commit id:'
1103 git_commit_date='2009-05-09 17:47:31 +0200'
1105 Its format is not guaranteed not to change over time.
1109 This module contains a good example of how to use tie to implement a
1110 cache and an example of how to make a tied variable readonly to those
1117 close(GLOS) if $Opts{glossary};
1119 print "written $Config_POD\n";
1121 my $orig_config_txt = "";
1122 my $orig_heavy_txt = "";
1126 $orig_config_txt = <$fh> if open $fh, "<", $Config_PM;
1127 $orig_heavy_txt = <$fh> if open $fh, "<", $Config_heavy;
1130 if ($orig_config_txt ne $config_txt or $orig_heavy_txt ne $heavy_txt) {
1131 open CONFIG, ">", $Config_PM or die "Can't open $Config_PM: $!\n";
1132 open CONFIG_HEAVY, ">", $Config_heavy or die "Can't open $Config_heavy: $!\n";
1133 print CONFIG $config_txt;
1134 print CONFIG_HEAVY $heavy_txt;
1135 close(CONFIG_HEAVY);
1137 print "updated $Config_PM\n";
1138 print "updated $Config_heavy\n";
1141 # Now do some simple tests on the Config.pm file we have created
1142 unshift(@INC,'lib');
1144 require $Config_heavy;
1147 die "$0: $Config_PM not valid"
1148 unless $Config{'PERL_CONFIG_SH'} eq 'true';
1150 die "$0: error processing $Config_PM"
1151 if defined($Config{'an impossible name'})
1152 or $Config{'PERL_CONFIG_SH'} ne 'true' # test cache
1155 die "$0: error processing $Config_PM"
1156 if eval '$Config{"cc"} = 1'
1157 or eval 'delete $Config{"cc"}'
1162 # Popularity of various entries in %Config, based on a large build and test
1163 # run of code in the Fotango build system:
1181 inc_version_list: 783
1184 usevendorprefix: 642
1205 installsiteman1dir: 489
1206 installsiteman3dir: 489
1207 installvendorman1dir: 489
1208 installvendorman3dir: 489
1212 installsitearch: 344
1217 installprefixexp: 336
1220 installvendorarch: 336
1221 installvendorbin: 336
1222 installvendorlib: 336