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'
561 $heavy_txt .= join('', sort @v_others) . "!END!\n";
563 # Only need the dynamic byteorder code in Config.pm if 'byteorder' is one of
565 if ($Common{byteorder}) {
566 $config_txt .= $byteorder_code;
568 $heavy_txt .= $byteorder_code;
571 if (@need_relocation) {
572 $heavy_txt .= 'foreach my $what (qw(' . join (' ', @need_relocation) .
574 s/^($what=)(['"])(.*?)\2/$1 . $2 . relocate_inc($3) . $2/me;
577 # Currently it only makes sense to do the ... relocation on Unix, so there's
578 # no need to emulate the "which separator for this platform" logic in perl.c -
579 # ':' will always be applicable
580 if ($need_relocation{otherlibdirs}) {
581 $heavy_txt .= << 'EOT';
582 s{^(otherlibdirs=)(['"])(.*?)\2}
583 {$1 . $2 . join ':', map {relocate_inc($_)} split ':', $3 . $2}me;
588 $heavy_txt .= <<'EOT';
589 s/(byteorder=)(['"]).*?\2/$1$2$Config::byteorder$2/m;
591 my $config_sh_len = length $_;
593 our $Config_SH_expanded = "\n$_" . << 'EOVIRTUAL';
596 foreach my $prefix (qw(ccflags ldflags)) {
597 my $value = fetch_string ({}, $prefix);
598 my $withlargefiles = fetch_string ({}, $prefix . "_uselargefiles");
599 if (defined $withlargefiles) {
600 $value =~ s/\Q$withlargefiles\E\b//;
601 $heavy_txt .= "${prefix}_nolargefiles='$value'\n";
605 foreach my $prefix (qw(libs libswanted)) {
606 my $value = fetch_string ({}, $prefix);
607 my $withlf = fetch_string ({}, 'libswanted_uselargefiles');
608 next unless defined $withlf;
610 = split(' ', fetch_string ({}, 'libswanted_uselargefiles'));
613 @lflibswanted{@lflibswanted} = ();
614 if ($prefix eq 'libs') {
615 my @libs = grep { /^-l(.+)/ &&
616 not exists $lflibswanted{$1} }
617 split(' ', fetch_string ({}, 'libs'));
618 $value = join(' ', @libs);
620 my @libswanted = grep { not exists $lflibswanted{$_} }
621 split(' ', fetch_string ({}, 'libswanted'));
622 $value = join(' ', @libswanted);
625 $heavy_txt .= "${prefix}_nolargefiles='$value'\n";
628 if (open(my $fh, "cflags")) {
632 if (/^warn="(.+)"$/) {
634 } elsif (/^stdflags="(.+)"$/) {
638 if (defined $ccwarnflags) {
639 $heavy_txt .= "ccwarnflags='$ccwarnflags'\n";
641 if (defined $ccstdflags) {
642 $heavy_txt .= "ccstdflags='$ccstdflags'\n";
646 $heavy_txt .= "EOVIRTUAL\n";
648 $heavy_txt .= <<'ENDOFGIT';
650 # do not have hairy conniptions if this isnt available
651 require 'Config_git.pl';
652 $Config_SH_expanded .= $Config::Git_Data;
654 } or warn "Warning: failed to load Config_git.pl, something strange about this perl...\n";
657 $heavy_txt .= $fetch_string;
659 $config_txt .= <<'ENDOFEND';
662 my($self, $key) = @_;
664 # check for cached value (which may be undef so we use exists not defined)
665 return exists $self->{$key} ? $self->{$key} : $self->fetch_string($key);
670 $heavy_txt .= <<'ENDOFEND';
676 substr($Config_SH_expanded, 1, index($Config_SH_expanded, '=') - 1 );
681 if ($seen_quotes{'"'}) {
682 $heavy_txt .= <<'ENDOFEND';
683 # Find out how the current key's quoted so we can skip to its end.
684 my $quote = substr($Config_SH_expanded,
685 index($Config_SH_expanded, "=", $prevpos)+1, 1);
686 my $pos = index($Config_SH_expanded, qq($quote\n), $prevpos) + 2;
689 # Just ' quotes, so it's much easier.
690 $heavy_txt .= <<'ENDOFEND';
691 my $pos = index($Config_SH_expanded, qq('\n), $prevpos) + 2;
694 $heavy_txt .= <<'ENDOFEND';
695 my $len = index($Config_SH_expanded, "=", $pos) - $pos;
697 $len > 0 ? substr($Config_SH_expanded, $pos, $len) : undef;
701 return 1 if exists($_[0]->{$_[1]});
703 return(index($Config_SH_expanded, "\n$_[1]='") != -1
705 if ($seen_quotes{'"'}) {
706 $heavy_txt .= <<'ENDOFEND';
707 or index($Config_SH_expanded, "\n$_[1]=\"") != -1
710 $heavy_txt .= <<'ENDOFEND';
714 sub STORE { die "\%Config::Config is read-only\n" }
715 *DELETE = *CLEAR = \*STORE; # Typeglob aliasing uses less space
718 substr $Config_SH_expanded, 1, $config_sh_len;
723 return map { chomp; $_ } grep eval{ /^(?:$re)=/ }, split /^/,
728 # implements -V:cfgvar option (see perlrun -V:)
730 # find optional leading, trailing colons; and query-spec
731 my ($notag,$qry,$lncont) = m/^(:)?(.*?)(:)?$/; # flags fore and aft,
732 # map colon-flags to print decorations
733 my $prfx = $notag ? '': "$qry="; # tag-prefix for print
734 my $lnend = $lncont ? ' ' : ";\n"; # line ending for print
736 # all config-vars are by definition \w only, any \W means regex
738 my @matches = config_re($qry);
739 print map "$_$lnend", @matches ? @matches : "$qry: not found" if !$notag;
740 print map { s/\w+=//; "$_$lnend" } @matches ? @matches : "$qry: not found" if $notag;
742 my $v = (exists $Config::Config{$qry}) ? $Config::Config{$qry}
744 $v = 'undef' unless defined $v;
745 print "${prfx}'${v}'$lnend";
750 # Called by the real AUTOLOAD
753 goto \&$Config::AUTOLOAD;
760 $config_txt .= <<'ENDOFSET';
763 my ($value, $v) = $Config_SH_expanded =~ m/^used_aout='(.*)'\s*$/m;
764 for (split ' ', $value) {
765 ($v) = $Config_SH_expanded =~ m/^aout_$_='(.*)'\s*$/m;
766 $preconfig{$_} = $v eq 'undef' ? undef : $v;
769 $preconfig{d_fork} = undef unless $OS2::can_fork; # Some funny cases can't
770 sub TIEHASH { bless {%preconfig} }
772 # Extract the name of the DLL from the makefile to avoid duplication
773 my ($f) = grep -r, qw(GNUMakefile Makefile);
775 if (open my $fh, '<', $f) {
777 $dll = $1, last if /^PERL_DLL_BASE\s*=\s*(\S*)\s*$/;
780 $config_txt .= <<ENDOFSET if $dll;
781 \$preconfig{dll_name} = '$dll';
784 $config_txt .= <<'ENDOFSET';
791 foreach my $key (keys %Common) {
792 my $value = fetch_string ({}, $key);
793 # Is it safe on the LHS of => ?
794 my $qkey = $key =~ /^[A-Za-z_][A-Za-z0-9_]*$/ ? $key : "'$key'";
795 if (defined $value) {
796 # Quote things for a '' string
797 $value =~ s!\\!\\\\!g;
800 if ($key eq 'otherlibdirs') {
801 $value = "join (':', map {relocate_inc(\$_)} split (':', $value))";
802 } elsif ($need_relocation{$key}) {
803 $value = "relocate_inc($value)";
808 $Common{$key} = "$qkey => $value";
811 if ($Common{byteorder}) {
812 $Common{byteorder} = 'byteorder => $byteorder';
814 my $fast_config = join '', map { " $_,\n" } sort values %Common;
816 # Sanity check needed to stop an infinite loop if Config_heavy.pl fails to
817 # define &launcher for some reason (eg it got truncated)
818 $config_txt .= sprintf <<'ENDOFTIE', $fast_config;
823 require 'Config_heavy.pl';
824 goto \&launcher unless $Config::AUTOLOAD =~ /launcher$/;
825 die "&Config::AUTOLOAD failed on $Config::AUTOLOAD";
828 # tie returns the object, so the value returned to require will be true.
829 tie %%Config, 'Config', {
834 open(CONFIG_POD, ">$Config_POD") or die "Can't open $Config_POD: $!";
835 print CONFIG_POD <<'ENDOFTAIL';
838 Config - access Perl configuration information
843 if ($Config{usethreads}) {
844 print "has thread support\n"
847 use Config qw(myconfig config_sh config_vars config_re);
855 config_vars(qw(osname archname));
860 The Config module contains all the information that was available to
861 the C<Configure> program at Perl build time (over 900 values).
863 Shell variables from the F<config.sh> file (written by Configure) are
864 stored in the readonly-variable C<%Config>, indexed by their names.
866 Values stored in config.sh as 'undef' are returned as undefined
867 values. The perl C<exists> function can be used to check if a
868 named variable exists.
870 For a description of the variables, please have a look at the
871 Glossary file, as written in the Porting folder, or use the url:
872 http://perl5.git.perl.org/perl.git/blob/HEAD:/Porting/Glossary
878 Returns a textual summary of the major perl configuration values.
879 See also C<-V> in L<perlrun/Command Switches>.
883 Returns the entire perl configuration information in the form of the
884 original config.sh shell variable assignment script.
886 =item config_re($regex)
888 Like config_sh() but returns, as a list, only the config entries who's
889 names match the $regex.
891 =item config_vars(@names)
893 Prints to STDOUT the values of the named configuration variable. Each is
894 printed on a separate line in the form:
898 Names which are unknown are output as C<name='UNKNOWN';>.
899 See also C<-V:name> in L<perlrun/Command Switches>.
901 =item bincompat_options()
903 Returns a list of C pre-processor options used when compiling this F<perl>
904 binary, which affect its binary compatibility with extensions.
905 C<bincompat_options()> and C<non_bincompat_options()> are shown together in
906 the output of C<perl -V> as I<Compile-time options>.
908 =item non_bincompat_options()
910 Returns a list of C pre-processor options used when compiling this F<perl>
911 binary, which do not affect binary compatibility with extensions.
915 Returns the compile date (as a string), equivalent to what is shown by
918 =item local_patches()
920 Returns a list of the names of locally applied patches, equivalent to what
921 is shown by C<perl -V>.
925 Returns a list of the header files that should be used as dependencies for
926 XS code, for this version of Perl on this platform.
932 Here's a more sophisticated example of using %Config:
939 unless($Config{sig_name} && $Config{sig_num}) {
942 my @names = split ' ', $Config{sig_name};
943 @sig_num{@names} = split ' ', $Config{sig_num};
945 $sig_name[$sig_num{$_}] ||= $_;
949 print "signal #17 = $sig_name[17]\n";
950 if ($sig_num{ALRM}) {
951 print "SIGALRM is $sig_num{ALRM}\n";
956 Because this information is not stored within the perl executable
957 itself it is possible (but unlikely) that the information does not
958 relate to the actual perl binary which is being used to access it.
960 The Config module is installed into the architecture and version
961 specific library directory ($Config{installarchlib}) and it checks the
962 perl version number when loaded.
964 The values stored in config.sh may be either single-quoted or
965 double-quoted. Double-quoted strings are handy for those cases where you
966 need to include escape sequences in the strings. To avoid runtime variable
967 interpolation, any C<$> and C<@> characters are replaced by C<\$> and
968 C<\@>, respectively. This isn't foolproof, of course, so don't embed C<\$>
969 or C<\@> in double-quoted strings unless you're willing to deal with the
970 consequences. (The slashes will end up escaped and the C<$> or C<@> will
971 trigger variable interpolation)
975 Most C<Config> variables are determined by the C<Configure> script
976 on platforms supported by it (which is most UNIX platforms). Some
977 platforms have custom-made C<Config> variables, and may thus not have
978 some of the variables described below, or may have extraneous variables
979 specific to that particular port. See the port specific documentation
986 if ($Opts{glossary}) {
987 open(GLOS, "<$Glossary") or die "Can't open $Glossary: $!";
995 if (s/\A(\w*)\s+\(([\w.]+)\):\s*\n(\t?)/=item C<$1>\n\nFrom F<$2>:\n\n/m) {
996 my $c = substr $1, 0, 1;
997 unless ($seen{$c}++) {
998 print CONFIG_POD <<EOF if $text;
1004 print CONFIG_POD <<EOF;
1015 elsif (!$text || !/\A\t/) {
1016 warn "Expected a Configure variable header",
1017 ($text ? " or another paragraph of description" : () ),
1018 ", instead we got:\n$_";
1021 s/n't/n\00t/g; # leave can't, won't etc untouched
1022 s/^\t\s+(.*)/\n$1/gm; # Indented lines ===> new paragraph
1023 s/^(?<!\n\n)\t(.*)/$1/gm; # Not indented lines ===> text
1024 s{([\'\"])(?=[^\'\"\s]*[./][^\'\"\s]*\1)([^\'\"\s]+)\1}(F<$2>)g; # '.o'
1025 s{([\'\"])([^\'\"\s]+)\1}(C<$2>)g; # "date" command
1026 s{\'([A-Za-z_\- *=/]+)\'}(C<$1>)g; # 'ln -s'
1028 (?<! [\w./<\'\"\$] ) # Only standalone file names
1029 (?! e \. g \. ) # Not e.g.
1030 (?! \. \. \. ) # Not ...
1031 (?! \d ) # Not 5.004
1032 (?! read/ ) # Not read/write
1033 (?! etc\. ) # Not etc.
1036 \$ ? # Allow leading $
1037 [\w./]* [./] [\w./]* # Require . or / inside
1039 (?<! \. (?= [\s)] ) ) # Do not include trailing dot
1040 (?! [\w/] ) # Include all of it
1042 (F<$1>)xg; # /usr/local
1043 s/((?<=\s)~\w*)/F<$1>/g; # ~name
1044 s/(?<![.<\'\"])\b([A-Z_]{2,})\b(?![\'\"])/C<$1>/g; # UNISTD
1045 s/(?<![.<\'\"])\b(?!the\b)(\w+)\s+macro\b/C<$1> macro/g; # FILE_cnt macro
1046 s/n[\0]t/n't/g; # undo can't, won't damage
1049 if ($Opts{glossary}) {
1050 <GLOS>; # Skip the "DO NOT EDIT"
1051 <GLOS>; # Skip the preamble
1057 die "Errors encountered while processing $Glossary. ",
1058 "Header lines are expected to be of the form:\n",
1060 "Maybe there is a malformed header?\n",
1065 print CONFIG_POD <<'ENDOFTAIL';
1071 Information on the git commit from which the current perl binary was compiled
1072 can be found in the variable C<$Config::Git_Data>. The variable is a
1073 structured string that looks something like this:
1075 git_commit_id='ea0c2dbd5f5ac6845ecc7ec6696415bf8e27bd52'
1076 git_describe='GitLive-blead-1076-gea0c2db'
1077 git_branch='smartmatch'
1078 git_uncommitted_changes=''
1079 git_commit_id_title='Commit id:'
1080 git_commit_date='2009-05-09 17:47:31 +0200'
1082 Its format is not guaranteed not to change over time.
1086 This module contains a good example of how to use tie to implement a
1087 cache and an example of how to make a tied variable readonly to those
1094 close(GLOS) if $Opts{glossary};
1096 print "written $Config_POD\n";
1098 my $orig_config_txt = "";
1099 my $orig_heavy_txt = "";
1103 $orig_config_txt = <$fh> if open $fh, "<", $Config_PM;
1104 $orig_heavy_txt = <$fh> if open $fh, "<", $Config_heavy;
1107 if ($orig_config_txt ne $config_txt or $orig_heavy_txt ne $heavy_txt) {
1108 open CONFIG, ">", $Config_PM or die "Can't open $Config_PM: $!\n";
1109 open CONFIG_HEAVY, ">", $Config_heavy or die "Can't open $Config_heavy: $!\n";
1110 print CONFIG $config_txt;
1111 print CONFIG_HEAVY $heavy_txt;
1112 close(CONFIG_HEAVY);
1114 print "updated $Config_PM\n";
1115 print "updated $Config_heavy\n";
1118 # Now do some simple tests on the Config.pm file we have created
1119 unshift(@INC,'lib');
1121 require $Config_heavy;
1124 die "$0: $Config_PM not valid"
1125 unless $Config{'PERL_CONFIG_SH'} eq 'true';
1127 die "$0: error processing $Config_PM"
1128 if defined($Config{'an impossible name'})
1129 or $Config{'PERL_CONFIG_SH'} ne 'true' # test cache
1132 die "$0: error processing $Config_PM"
1133 if eval '$Config{"cc"} = 1'
1134 or eval 'delete $Config{"cc"}'
1139 # Popularity of various entries in %Config, based on a large build and test
1140 # run of code in the Fotango build system:
1158 inc_version_list: 783
1161 usevendorprefix: 642
1182 installsiteman1dir: 489
1183 installsiteman3dir: 489
1184 installvendorman1dir: 489
1185 installvendorman3dir: 489
1189 installsitearch: 344
1194 installprefixexp: 336
1197 installvendorarch: 336
1198 installvendorbin: 336
1199 installvendorlib: 336