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 use vars qw(%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', $], $export_funcs;
148 # This file was created by configpm when Perl was built. Any changes
149 # made to this file will be lost the next time perl is built.
151 # for a description of the variables, please have a look at the
152 # Glossary file, as written in the Porting folder, or use the url:
153 # http://perl5.git.perl.org/perl.git/blob/HEAD:/Porting/Glossary
158 use vars '%%Config', '$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;
219 open(CONFIG_SH, $Config_SH) || die "Can't open $Config_SH: $!";
220 while (<CONFIG_SH>) {
221 next if m:^#!/bin/sh:;
223 # Catch PERL_CONFIG_SH=true and PERL_VERSION=n line from Configure.
224 s/^(\w+)=(true|\d+)\s*$/$1='$2'\n/ or m/^(\w+)='(.*)'$/;
225 my($k, $v) = ($1, $2);
227 # grandfather PATCHLEVEL and SUBVERSION and CONFIG
229 if ($k eq 'PERL_VERSION') {
230 push @v_others, "PATCHLEVEL='$v'\n";
232 elsif ($k eq 'PERL_SUBVERSION') {
233 push @v_others, "SUBVERSION='$v'\n";
235 elsif ($k eq 'PERL_CONFIG_SH') {
236 push @v_others, "CONFIG='$v'\n";
240 # We can delimit things in config.sh with either ' or ".
241 unless ($in_v or m/^(\w+)=(['"])(.*\n)/){
242 push(@non_v, "#$_"); # not a name='value' line
250 ($name,$val) = ($1,$3);
252 $in_v = $val !~ /$quote\n/;
255 s,/,::,g if $Extensions{$name};
257 $val =~ s/$quote\n?\z//;
259 my $line = "$name=$quote$val$quote\n";
260 push(@v_others, $line);
261 $seen_quotes{$quote}++;
266 # This is somewhat grim, but I want the code for parsing config.sh here and
267 # now so that I can expand $Config{ivsize} and $Config{ivtype}
269 my $fetch_string = <<'EOT';
271 # Search for it in the big string
273 my($self, $key) = @_;
277 if ($seen_quotes{'"'}) {
278 # We need the full ' and " code
280 $fetch_string .= <<'EOT';
281 return undef unless my ($quote_type, $value) = $Config_SH_expanded =~ /\n$key=(['"])(.*?)\1\n/s;
283 # If we had a double-quote, we'd better eval it so escape
284 # sequences and such can be interpolated. Since the incoming
285 # value is supposed to follow shell rules and not perl rules,
286 # we escape any perl variable markers
288 # Historically, since " 'support' was added in change 1409, the
289 # interpolation was done before the undef. Stick to this arguably buggy
290 # behaviour as we're refactoring.
291 if ($quote_type eq '"') {
292 $value =~ s/\$/\\\$/g;
293 $value =~ s/\@/\\\@/g;
294 eval "\$value = \"$value\"";
297 # So we can say "if $Config{'foo'}".
298 $self->{$key} = $value eq 'undef' ? undef : $value; # cache it
303 # We only have ' delimited.
305 $fetch_string .= <<'EOT';
306 return undef unless $Config_SH_expanded =~ /\n$key=\'(.*?)\'\n/s;
307 # So we can say "if $Config{'foo'}".
308 $self->{$key} = $1 eq 'undef' ? undef : $1;
317 # Calculation for the keys for byteorder
318 # This is somewhat grim, but I need to run fetch_string here.
319 our $Config_SH_expanded = join "\n", '', @v_others;
321 my $t = fetch_string ({}, 'ivtype');
322 my $s = fetch_string ({}, 'ivsize');
324 # byteorder does exist on its own but we overlay a virtual
325 # dynamically recomputed value.
327 # However, ivtype and ivsize will not vary for sane fat binaries
329 my $f = $t eq 'long' ? 'L!' : $s == 8 ? 'Q': 'I';
332 if ($s == 4 || $s == 8) {
333 my $list = join ',', reverse(1..$s-1);
335 $byteorder_code = <<"EOT";
338 foreach my \$c ($list) { \$i <<= 8; \$i |= ord(\$c); }
339 our \$byteorder = join('', unpack('$format', pack('$f', \$i)));
342 $byteorder_code = "our \$byteorder = '?'x$s;\n";
347 if (fetch_string({},'userelocatableinc')) {
348 foreach my $what (qw(prefixexp
397 installvendorhtml1dir
398 installvendorhtml3dir
404 push @need_relocation, $what if fetch_string({}, $what) =~ m!^\.\.\./!;
409 @need_relocation{@need_relocation} = @need_relocation;
411 # This can have .../ anywhere:
412 if (fetch_string({}, 'otherlibdirs') =~ m!\.\.\./!) {
413 $need_relocation{otherlibdirs} = 'otherlibdirs';
416 my $relocation_code = <<'EOT';
420 return $libdir unless $libdir =~ s!^\.\.\./!!;
422 if ($prefix =~ s!/[^/]*$!!) {
423 while ($libdir =~ m!^\.\./!) {
424 # Loop while $libdir starts "../" and $prefix still has a trailing
426 last unless $prefix =~ s!/([^/]+)$!!;
427 # but bail out if the directory we picked off the end of $prefix is .
429 if ($1 eq '.' or $1 eq '..') {
430 # Undo! This should be rare, hence code it this way rather than a
431 # check each time before the s!!! above.
432 $prefix = "$prefix/$1";
435 # Remove that leading ../ and loop again
436 substr ($libdir, 0, 3, '');
438 $libdir = "$prefix/$libdir";
444 my $osname = fetch_string({}, 'osname');
445 my $from = $osname eq 'VMS' ? 'PERLSHR image' : 'binary (from libperl)';
446 my $env_cygwin = $osname eq 'cygwin'
447 ? 'push @env, "CYGWIN=\"$ENV{CYGWIN}\"" if $ENV{CYGWIN};' . "\n" : "";
449 $heavy_txt .= sprintf <<'ENDOFBEG', $osname, $osname, $from, $osname, $env_cygwin;
450 # This file was created by configpm when Perl was built. Any changes
451 # made to this file will be lost the next time perl is built.
458 sub bincompat_options {
459 return split ' ', (Internals::V())[0];
462 sub non_bincompat_options {
463 return split ' ', (Internals::V())[1];
467 return (Internals::V())[2]
471 my (undef, undef, undef, @patches) = Internals::V();
476 die "Perl lib was built for '%s' but is being run on '$^O'"
479 my ($bincompat, $non_bincompat, $date, @patches) = Internals::V();
481 my @opts = sort split ' ', "$bincompat $non_bincompat";
483 print Config::myconfig();
484 print "\nCharacteristics of this %s: \n";
486 print " Compile-time options:\n";
487 print " $_\n" for @opts;
490 print " Locally applied patches:\n";
491 print " $_\n" foreach @patches;
494 print " Built under %s\n";
496 print " $date\n" if defined $date;
498 my @env = map { "$_=\"$ENV{$_}\"" } sort grep {/^PERL/} keys %%ENV;
502 print " $_\n" foreach @env;
505 print " $_\n" foreach @INC;
511 $heavy_txt .= $header_files . "\n}\n\n";
513 if (%need_relocation) {
514 my $relocations_in_common;
515 # otherlibdirs only features in the hash
516 foreach (keys %need_relocation) {
517 $relocations_in_common++ if $Common{$_};
519 if ($relocations_in_common) {
520 $config_txt .= $relocation_code;
522 $heavy_txt .= $relocation_code;
526 $heavy_txt .= join('', @non_v) . "\n";
528 # copy config summary format from the myconfig.SH script
529 $heavy_txt .= "our \$summary = <<'!END!';\n";
530 open(MYCONFIG,"<myconfig.SH") || die "open myconfig.SH failed: $!";
531 1 while defined($_ = <MYCONFIG>) && !/^Summary of/;
532 do { $heavy_txt .= $_ } until !defined($_ = <MYCONFIG>) || /^\s*$/;
535 $heavy_txt .= "\n!END!\n" . <<'EOT';
536 my $summary_expanded;
539 return $summary_expanded if $summary_expanded;
540 ($summary_expanded = $summary) =~ s{\$(\w+)}
543 if ($1 eq 'git_ancestor_line') {
544 if ($Config::Config{git_ancestor}) {
545 $c= "\n Ancestor: $Config::Config{git_ancestor}";
550 $c = $Config::Config{$1};
552 defined($c) ? $c : 'undef'
560 #proper lexicographical order of the keys
561 $heavy_txt .= join('',
563 sort {$a->[0] cmp $b->[0] }
565 /^([^=]+)/ ? [ $1, $_ ]
566 : [ $_, $_ ] # shouldnt happen
570 # Only need the dynamic byteorder code in Config.pm if 'byteorder' is one of
572 if ($Common{byteorder}) {
573 $config_txt .= $byteorder_code;
575 $heavy_txt .= $byteorder_code;
578 if (@need_relocation) {
579 $heavy_txt .= 'foreach my $what (qw(' . join (' ', @need_relocation) .
581 s/^($what=)(['"])(.*?)\2/$1 . $2 . relocate_inc($3) . $2/me;
584 # Currently it only makes sense to do the ... relocation on Unix, so there's
585 # no need to emulate the "which separator for this platform" logic in perl.c -
586 # ':' will always be applicable
587 if ($need_relocation{otherlibdirs}) {
588 $heavy_txt .= << 'EOT';
589 s{^(otherlibdirs=)(['"])(.*?)\2}
590 {$1 . $2 . join ':', map {relocate_inc($_)} split ':', $3 . $2}me;
595 $heavy_txt .= <<'EOT';
596 s/(byteorder=)(['"]).*?\2/$1$2$Config::byteorder$2/m;
598 my $config_sh_len = length $_;
600 our $Config_SH_expanded = "\n$_" . << 'EOVIRTUAL';
603 foreach my $prefix (qw(ccflags ldflags)) {
604 my $value = fetch_string ({}, $prefix);
605 my $withlargefiles = fetch_string ({}, $prefix . "_uselargefiles");
606 if (defined $withlargefiles) {
607 $value =~ s/\Q$withlargefiles\E\b//;
608 $heavy_txt .= "${prefix}_nolargefiles='$value'\n";
612 foreach my $prefix (qw(libs libswanted)) {
613 my $value = fetch_string ({}, $prefix);
614 my $withlf = fetch_string ({}, 'libswanted_uselargefiles');
615 next unless defined $withlf;
617 = split(' ', fetch_string ({}, 'libswanted_uselargefiles'));
620 @lflibswanted{@lflibswanted} = ();
621 if ($prefix eq 'libs') {
622 my @libs = grep { /^-l(.+)/ &&
623 not exists $lflibswanted{$1} }
624 split(' ', fetch_string ({}, 'libs'));
625 $value = join(' ', @libs);
627 my @libswanted = grep { not exists $lflibswanted{$_} }
628 split(' ', fetch_string ({}, 'libswanted'));
629 $value = join(' ', @libswanted);
632 $heavy_txt .= "${prefix}_nolargefiles='$value'\n";
635 if (open(my $fh, "cflags")) {
639 if (/^warn="(.+)"$/) {
641 } elsif (/^stdflags="(.+)"$/) {
645 if (defined $ccwarnflags) {
646 $heavy_txt .= "ccwarnflags='$ccwarnflags'\n";
648 if (defined $ccstdflags) {
649 $heavy_txt .= "ccstdflags='$ccstdflags'\n";
653 $heavy_txt .= "EOVIRTUAL\n";
655 $heavy_txt .= <<'ENDOFGIT';
657 # do not have hairy conniptions if this isnt available
658 require 'Config_git.pl';
659 $Config_SH_expanded .= $Config::Git_Data;
661 } or warn "Warning: failed to load Config_git.pl, something strange about this perl...\n";
664 $heavy_txt .= $fetch_string;
666 $config_txt .= <<'ENDOFEND';
669 my($self, $key) = @_;
671 # check for cached value (which may be undef so we use exists not defined)
672 return exists $self->{$key} ? $self->{$key} : $self->fetch_string($key);
677 $heavy_txt .= <<'ENDOFEND';
683 substr($Config_SH_expanded, 1, index($Config_SH_expanded, '=') - 1 );
688 if ($seen_quotes{'"'}) {
689 $heavy_txt .= <<'ENDOFEND';
690 # Find out how the current key's quoted so we can skip to its end.
691 my $quote = substr($Config_SH_expanded,
692 index($Config_SH_expanded, "=", $prevpos)+1, 1);
693 my $pos = index($Config_SH_expanded, qq($quote\n), $prevpos) + 2;
696 # Just ' quotes, so it's much easier.
697 $heavy_txt .= <<'ENDOFEND';
698 my $pos = index($Config_SH_expanded, qq('\n), $prevpos) + 2;
701 $heavy_txt .= <<'ENDOFEND';
702 my $len = index($Config_SH_expanded, "=", $pos) - $pos;
704 $len > 0 ? substr($Config_SH_expanded, $pos, $len) : undef;
708 return 1 if exists($_[0]->{$_[1]});
710 return(index($Config_SH_expanded, "\n$_[1]='") != -1
712 if ($seen_quotes{'"'}) {
713 $heavy_txt .= <<'ENDOFEND';
714 or index($Config_SH_expanded, "\n$_[1]=\"") != -1
717 $heavy_txt .= <<'ENDOFEND';
721 sub STORE { die "\%Config::Config is read-only\n" }
722 *DELETE = *CLEAR = \*STORE; # Typeglob aliasing uses less space
725 substr $Config_SH_expanded, 1, $config_sh_len;
730 return map { chomp; $_ } grep eval{ /^(?:$re)=/ }, split /^/,
735 # implements -V:cfgvar option (see perlrun -V:)
737 # find optional leading, trailing colons; and query-spec
738 my ($notag,$qry,$lncont) = m/^(:)?(.*?)(:)?$/; # flags fore and aft,
739 # map colon-flags to print decorations
740 my $prfx = $notag ? '': "$qry="; # tag-prefix for print
741 my $lnend = $lncont ? ' ' : ";\n"; # line ending for print
743 # all config-vars are by definition \w only, any \W means regex
745 my @matches = config_re($qry);
746 print map "$_$lnend", @matches ? @matches : "$qry: not found" if !$notag;
747 print map { s/\w+=//; "$_$lnend" } @matches ? @matches : "$qry: not found" if $notag;
749 my $v = (exists $Config::Config{$qry}) ? $Config::Config{$qry}
751 $v = 'undef' unless defined $v;
752 print "${prfx}'${v}'$lnend";
757 # Called by the real AUTOLOAD
760 goto \&$Config::AUTOLOAD;
767 $config_txt .= <<'ENDOFSET';
770 my ($value, $v) = $Config_SH_expanded =~ m/^used_aout='(.*)'\s*$/m;
771 for (split ' ', $value) {
772 ($v) = $Config_SH_expanded =~ m/^aout_$_='(.*)'\s*$/m;
773 $preconfig{$_} = $v eq 'undef' ? undef : $v;
776 $preconfig{d_fork} = undef unless $OS2::can_fork; # Some funny cases can't
777 sub TIEHASH { bless {%preconfig} }
779 # Extract the name of the DLL from the makefile to avoid duplication
780 my ($f) = grep -r, qw(GNUMakefile Makefile);
782 if (open my $fh, '<', $f) {
784 $dll = $1, last if /^PERL_DLL_BASE\s*=\s*(\S*)\s*$/;
787 $config_txt .= <<ENDOFSET if $dll;
788 \$preconfig{dll_name} = '$dll';
791 $config_txt .= <<'ENDOFSET';
798 foreach my $key (keys %Common) {
799 my $value = fetch_string ({}, $key);
800 # Is it safe on the LHS of => ?
801 my $qkey = $key =~ /^[A-Za-z_][A-Za-z0-9_]*$/ ? $key : "'$key'";
802 if (defined $value) {
803 # Quote things for a '' string
804 $value =~ s!\\!\\\\!g;
807 if ($key eq 'otherlibdirs') {
808 $value = "join (':', map {relocate_inc(\$_)} split (':', $value))";
809 } elsif ($need_relocation{$key}) {
810 $value = "relocate_inc($value)";
815 $Common{$key} = "$qkey => $value";
818 if ($Common{byteorder}) {
819 $Common{byteorder} = 'byteorder => $byteorder';
821 my $fast_config = join '', map { " $_,\n" } sort values %Common;
823 # Sanity check needed to stop an infinite loop if Config_heavy.pl fails to
824 # define &launcher for some reason (eg it got truncated)
825 $config_txt .= sprintf <<'ENDOFTIE', $fast_config;
830 require 'Config_heavy.pl';
831 goto \&launcher unless $Config::AUTOLOAD =~ /launcher$/;
832 die "&Config::AUTOLOAD failed on $Config::AUTOLOAD";
835 # tie returns the object, so the value returned to require will be true.
836 tie %%Config, 'Config', {
841 open(CONFIG_POD, ">$Config_POD") or die "Can't open $Config_POD: $!";
842 print CONFIG_POD <<'ENDOFTAIL';
845 Config - access Perl configuration information
850 if ($Config{usethreads}) {
851 print "has thread support\n"
854 use Config qw(myconfig config_sh config_vars config_re);
862 config_vars(qw(osname archname));
867 The Config module contains all the information that was available to
868 the C<Configure> program at Perl build time (over 900 values).
870 Shell variables from the F<config.sh> file (written by Configure) are
871 stored in the readonly-variable C<%Config>, indexed by their names.
873 Values stored in config.sh as 'undef' are returned as undefined
874 values. The perl C<exists> function can be used to check if a
875 named variable exists.
877 For a description of the variables, please have a look at the
878 Glossary file, as written in the Porting folder, or use the url:
879 http://perl5.git.perl.org/perl.git/blob/HEAD:/Porting/Glossary
885 Returns a textual summary of the major perl configuration values.
886 See also C<-V> in L<perlrun/Command Switches>.
890 Returns the entire perl configuration information in the form of the
891 original config.sh shell variable assignment script.
893 =item config_re($regex)
895 Like config_sh() but returns, as a list, only the config entries who's
896 names match the $regex.
898 =item config_vars(@names)
900 Prints to STDOUT the values of the named configuration variable. Each is
901 printed on a separate line in the form:
905 Names which are unknown are output as C<name='UNKNOWN';>.
906 See also C<-V:name> in L<perlrun/Command Switches>.
908 =item bincompat_options()
910 Returns a list of C pre-processor options used when compiling this F<perl>
911 binary, which affect its binary compatibility with extensions.
912 C<bincompat_options()> and C<non_bincompat_options()> are shown together in
913 the output of C<perl -V> as I<Compile-time options>.
915 =item non_bincompat_options()
917 Returns a list of C pre-processor options used when compiling this F<perl>
918 binary, which do not affect binary compatibility with extensions.
922 Returns the compile date (as a string), equivalent to what is shown by
925 =item local_patches()
927 Returns a list of the names of locally applied patches, equivalent to what
928 is shown by C<perl -V>.
932 Returns a list of the header files that should be used as dependencies for
933 XS code, for this version of Perl on this platform.
939 Here's a more sophisticated example of using %Config:
946 unless($Config{sig_name} && $Config{sig_num}) {
949 my @names = split ' ', $Config{sig_name};
950 @sig_num{@names} = split ' ', $Config{sig_num};
952 $sig_name[$sig_num{$_}] ||= $_;
956 print "signal #17 = $sig_name[17]\n";
957 if ($sig_num{ALRM}) {
958 print "SIGALRM is $sig_num{ALRM}\n";
963 Because this information is not stored within the perl executable
964 itself it is possible (but unlikely) that the information does not
965 relate to the actual perl binary which is being used to access it.
967 The Config module is installed into the architecture and version
968 specific library directory ($Config{installarchlib}) and it checks the
969 perl version number when loaded.
971 The values stored in config.sh may be either single-quoted or
972 double-quoted. Double-quoted strings are handy for those cases where you
973 need to include escape sequences in the strings. To avoid runtime variable
974 interpolation, any C<$> and C<@> characters are replaced by C<\$> and
975 C<\@>, respectively. This isn't foolproof, of course, so don't embed C<\$>
976 or C<\@> in double-quoted strings unless you're willing to deal with the
977 consequences. (The slashes will end up escaped and the C<$> or C<@> will
978 trigger variable interpolation)
982 Most C<Config> variables are determined by the C<Configure> script
983 on platforms supported by it (which is most UNIX platforms). Some
984 platforms have custom-made C<Config> variables, and may thus not have
985 some of the variables described below, or may have extraneous variables
986 specific to that particular port. See the port specific documentation
993 if ($Opts{glossary}) {
994 open(GLOS, "<$Glossary") or die "Can't open $Glossary: $!";
1002 if (s/\A(\w*)\s+\(([\w.]+)\):\s*\n(\t?)/=item C<$1>\n\nFrom F<$2>:\n\n/m) {
1003 my $c = substr $1, 0, 1;
1004 unless ($seen{$c}++) {
1005 print CONFIG_POD <<EOF if $text;
1011 print CONFIG_POD <<EOF;
1022 elsif (!$text || !/\A\t/) {
1023 warn "Expected a Configure variable header",
1024 ($text ? " or another paragraph of description" : () ),
1025 ", instead we got:\n$_";
1028 s/n't/n\00t/g; # leave can't, won't etc untouched
1029 s/^\t\s+(.*)/\n$1/gm; # Indented lines ===> new paragraph
1030 s/^(?<!\n\n)\t(.*)/$1/gm; # Not indented lines ===> text
1031 s{([\'\"])(?=[^\'\"\s]*[./][^\'\"\s]*\1)([^\'\"\s]+)\1}(F<$2>)g; # '.o'
1032 s{([\'\"])([^\'\"\s]+)\1}(C<$2>)g; # "date" command
1033 s{\'([A-Za-z_\- *=/]+)\'}(C<$1>)g; # 'ln -s'
1035 (?<! [\w./<\'\"\$] ) # Only standalone file names
1036 (?! e \. g \. ) # Not e.g.
1037 (?! \. \. \. ) # Not ...
1038 (?! \d ) # Not 5.004
1039 (?! read/ ) # Not read/write
1040 (?! etc\. ) # Not etc.
1043 \$ ? # Allow leading $
1044 [\w./]* [./] [\w./]* # Require . or / inside
1046 (?<! \. (?= [\s)] ) ) # Do not include trailing dot
1047 (?! [\w/] ) # Include all of it
1049 (F<$1>)xg; # /usr/local
1050 s/((?<=\s)~\w*)/F<$1>/g; # ~name
1051 s/(?<![.<\'\"])\b([A-Z_]{2,})\b(?![\'\"])/C<$1>/g; # UNISTD
1052 s/(?<![.<\'\"])\b(?!the\b)(\w+)\s+macro\b/C<$1> macro/g; # FILE_cnt macro
1053 s/n[\0]t/n't/g; # undo can't, won't damage
1056 if ($Opts{glossary}) {
1057 <GLOS>; # Skip the "DO NOT EDIT"
1058 <GLOS>; # Skip the preamble
1064 die "Errors encountered while processing $Glossary. ",
1065 "Header lines are expected to be of the form:\n",
1067 "Maybe there is a malformed header?\n",
1072 print CONFIG_POD <<'ENDOFTAIL';
1078 Information on the git commit from which the current perl binary was compiled
1079 can be found in the variable C<$Config::Git_Data>. The variable is a
1080 structured string that looks something like this:
1082 git_commit_id='ea0c2dbd5f5ac6845ecc7ec6696415bf8e27bd52'
1083 git_describe='GitLive-blead-1076-gea0c2db'
1084 git_branch='smartmatch'
1085 git_uncommitted_changes=''
1086 git_commit_id_title='Commit id:'
1087 git_commit_date='2009-05-09 17:47:31 +0200'
1089 Its format is not guaranteed not to change over time.
1093 This module contains a good example of how to use tie to implement a
1094 cache and an example of how to make a tied variable readonly to those
1101 close(GLOS) if $Opts{glossary};
1103 print "written $Config_POD\n";
1105 my $orig_config_txt = "";
1106 my $orig_heavy_txt = "";
1110 $orig_config_txt = <$fh> if open $fh, "<", $Config_PM;
1111 $orig_heavy_txt = <$fh> if open $fh, "<", $Config_heavy;
1114 if ($orig_config_txt ne $config_txt or $orig_heavy_txt ne $heavy_txt) {
1115 open CONFIG, ">", $Config_PM or die "Can't open $Config_PM: $!\n";
1116 open CONFIG_HEAVY, ">", $Config_heavy or die "Can't open $Config_heavy: $!\n";
1117 print CONFIG $config_txt;
1118 print CONFIG_HEAVY $heavy_txt;
1119 close(CONFIG_HEAVY);
1121 print "updated $Config_PM\n";
1122 print "updated $Config_heavy\n";
1125 # Now do some simple tests on the Config.pm file we have created
1126 unshift(@INC,'lib');
1128 require $Config_heavy;
1131 die "$0: $Config_PM not valid"
1132 unless $Config{'PERL_CONFIG_SH'} eq 'true';
1134 die "$0: error processing $Config_PM"
1135 if defined($Config{'an impossible name'})
1136 or $Config{'PERL_CONFIG_SH'} ne 'true' # test cache
1139 die "$0: error processing $Config_PM"
1140 if eval '$Config{"cc"} = 1'
1141 or eval 'delete $Config{"cc"}'
1146 # Popularity of various entries in %Config, based on a large build and test
1147 # run of code in the Fotango build system:
1165 inc_version_list: 783
1168 usevendorprefix: 642
1189 installsiteman1dir: 489
1190 installsiteman3dir: 489
1191 installvendorman1dir: 489
1192 installvendorman3dir: 489
1196 installsitearch: 344
1201 installprefixexp: 336
1204 installvendorarch: 336
1205 installvendorbin: 336
1206 installvendorlib: 336