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 $opts = join ' ', sort split ' ', "$bincompat $non_bincompat";
483 # wrap at 76 columns.
485 $opts =~ s/(?=.{53})(.{1,53}) /$1\n /mg;
487 print Config::myconfig();
488 print "\nCharacteristics of this %s: \n";
490 print " Compile-time options: $opts\n";
493 print " Locally applied patches:\n";
494 print "\t$_\n" foreach @patches;
497 print " Built under %s\n";
499 print " $date\n" if defined $date;
501 my @env = map { "$_=\"$ENV{$_}\"" } sort grep {/^PERL/} keys %%ENV;
505 print " $_\n" foreach @env;
508 print " $_\n" foreach @INC;
514 $heavy_txt .= $header_files . "\n}\n\n";
516 if (%need_relocation) {
517 my $relocations_in_common;
518 # otherlibdirs only features in the hash
519 foreach (keys %need_relocation) {
520 $relocations_in_common++ if $Common{$_};
522 if ($relocations_in_common) {
523 $config_txt .= $relocation_code;
525 $heavy_txt .= $relocation_code;
529 $heavy_txt .= join('', @non_v) . "\n";
531 # copy config summary format from the myconfig.SH script
532 $heavy_txt .= "our \$summary = <<'!END!';\n";
533 open(MYCONFIG,"<myconfig.SH") || die "open myconfig.SH failed: $!";
534 1 while defined($_ = <MYCONFIG>) && !/^Summary of/;
535 do { $heavy_txt .= $_ } until !defined($_ = <MYCONFIG>) || /^\s*$/;
538 $heavy_txt .= "\n!END!\n" . <<'EOT';
539 my $summary_expanded;
542 return $summary_expanded if $summary_expanded;
543 ($summary_expanded = $summary) =~ s{\$(\w+)}
546 if ($1 eq 'git_ancestor_line') {
547 if ($Config::Config{git_ancestor}) {
548 $c= "\n Ancestor: $Config::Config{git_ancestor}";
553 $c = $Config::Config{$1};
555 defined($c) ? $c : 'undef'
564 $heavy_txt .= join('', sort @v_others) . "!END!\n";
566 # Only need the dynamic byteorder code in Config.pm if 'byteorder' is one of
568 if ($Common{byteorder}) {
569 $config_txt .= $byteorder_code;
571 $heavy_txt .= $byteorder_code;
574 if (@need_relocation) {
575 $heavy_txt .= 'foreach my $what (qw(' . join (' ', @need_relocation) .
577 s/^($what=)(['"])(.*?)\2/$1 . $2 . relocate_inc($3) . $2/me;
580 # Currently it only makes sense to do the ... relocation on Unix, so there's
581 # no need to emulate the "which separator for this platform" logic in perl.c -
582 # ':' will always be applicable
583 if ($need_relocation{otherlibdirs}) {
584 $heavy_txt .= << 'EOT';
585 s{^(otherlibdirs=)(['"])(.*?)\2}
586 {$1 . $2 . join ':', map {relocate_inc($_)} split ':', $3 . $2}me;
591 $heavy_txt .= <<'EOT';
592 s/(byteorder=)(['"]).*?\2/$1$2$Config::byteorder$2/m;
594 my $config_sh_len = length $_;
596 our $Config_SH_expanded = "\n$_" . << 'EOVIRTUAL';
599 foreach my $prefix (qw(ccflags ldflags)) {
600 my $value = fetch_string ({}, $prefix);
601 my $withlargefiles = fetch_string ({}, $prefix . "_uselargefiles");
602 if (defined $withlargefiles) {
603 $value =~ s/\Q$withlargefiles\E\b//;
604 $heavy_txt .= "${prefix}_nolargefiles='$value'\n";
608 foreach my $prefix (qw(libs libswanted)) {
609 my $value = fetch_string ({}, $prefix);
610 my $withlf = fetch_string ({}, 'libswanted_uselargefiles');
611 next unless defined $withlf;
613 = split(' ', fetch_string ({}, 'libswanted_uselargefiles'));
616 @lflibswanted{@lflibswanted} = ();
617 if ($prefix eq 'libs') {
618 my @libs = grep { /^-l(.+)/ &&
619 not exists $lflibswanted{$1} }
620 split(' ', fetch_string ({}, 'libs'));
621 $value = join(' ', @libs);
623 my @libswanted = grep { not exists $lflibswanted{$_} }
624 split(' ', fetch_string ({}, 'libswanted'));
625 $value = join(' ', @libswanted);
628 $heavy_txt .= "${prefix}_nolargefiles='$value'\n";
631 $heavy_txt .= "EOVIRTUAL\n";
633 $heavy_txt .= <<'ENDOFGIT';
635 # do not have hairy conniptions if this isnt available
636 require 'Config_git.pl';
637 $Config_SH_expanded .= $Config::Git_Data;
639 } or warn "Warning: failed to load Config_git.pl, something strange about this perl...\n";
642 $heavy_txt .= $fetch_string;
644 $config_txt .= <<'ENDOFEND';
647 my($self, $key) = @_;
649 # check for cached value (which may be undef so we use exists not defined)
650 return exists $self->{$key} ? $self->{$key} : $self->fetch_string($key);
655 $heavy_txt .= <<'ENDOFEND';
661 substr($Config_SH_expanded, 1, index($Config_SH_expanded, '=') - 1 );
666 if ($seen_quotes{'"'}) {
667 $heavy_txt .= <<'ENDOFEND';
668 # Find out how the current key's quoted so we can skip to its end.
669 my $quote = substr($Config_SH_expanded,
670 index($Config_SH_expanded, "=", $prevpos)+1, 1);
671 my $pos = index($Config_SH_expanded, qq($quote\n), $prevpos) + 2;
674 # Just ' quotes, so it's much easier.
675 $heavy_txt .= <<'ENDOFEND';
676 my $pos = index($Config_SH_expanded, qq('\n), $prevpos) + 2;
679 $heavy_txt .= <<'ENDOFEND';
680 my $len = index($Config_SH_expanded, "=", $pos) - $pos;
682 $len > 0 ? substr($Config_SH_expanded, $pos, $len) : undef;
686 return 1 if exists($_[0]->{$_[1]});
688 return(index($Config_SH_expanded, "\n$_[1]='") != -1
690 if ($seen_quotes{'"'}) {
691 $heavy_txt .= <<'ENDOFEND';
692 or index($Config_SH_expanded, "\n$_[1]=\"") != -1
695 $heavy_txt .= <<'ENDOFEND';
699 sub STORE { die "\%Config::Config is read-only\n" }
700 *DELETE = *CLEAR = \*STORE; # Typeglob aliasing uses less space
703 substr $Config_SH_expanded, 1, $config_sh_len;
708 return map { chomp; $_ } grep eval{ /^(?:$re)=/ }, split /^/,
713 # implements -V:cfgvar option (see perlrun -V:)
715 # find optional leading, trailing colons; and query-spec
716 my ($notag,$qry,$lncont) = m/^(:)?(.*?)(:)?$/; # flags fore and aft,
717 # map colon-flags to print decorations
718 my $prfx = $notag ? '': "$qry="; # tag-prefix for print
719 my $lnend = $lncont ? ' ' : ";\n"; # line ending for print
721 # all config-vars are by definition \w only, any \W means regex
723 my @matches = config_re($qry);
724 print map "$_$lnend", @matches ? @matches : "$qry: not found" if !$notag;
725 print map { s/\w+=//; "$_$lnend" } @matches ? @matches : "$qry: not found" if $notag;
727 my $v = (exists $Config::Config{$qry}) ? $Config::Config{$qry}
729 $v = 'undef' unless defined $v;
730 print "${prfx}'${v}'$lnend";
735 # Called by the real AUTOLOAD
738 goto \&$Config::AUTOLOAD;
745 $config_txt .= <<'ENDOFSET';
748 my ($value, $v) = $Config_SH_expanded =~ m/^used_aout='(.*)'\s*$/m;
749 for (split ' ', $value) {
750 ($v) = $Config_SH_expanded =~ m/^aout_$_='(.*)'\s*$/m;
751 $preconfig{$_} = $v eq 'undef' ? undef : $v;
754 $preconfig{d_fork} = undef unless $OS2::can_fork; # Some funny cases can't
755 sub TIEHASH { bless {%preconfig} }
757 # Extract the name of the DLL from the makefile to avoid duplication
758 my ($f) = grep -r, qw(GNUMakefile Makefile);
760 if (open my $fh, '<', $f) {
762 $dll = $1, last if /^PERL_DLL_BASE\s*=\s*(\S*)\s*$/;
765 $config_txt .= <<ENDOFSET if $dll;
766 \$preconfig{dll_name} = '$dll';
769 $config_txt .= <<'ENDOFSET';
776 foreach my $key (keys %Common) {
777 my $value = fetch_string ({}, $key);
778 # Is it safe on the LHS of => ?
779 my $qkey = $key =~ /^[A-Za-z_][A-Za-z0-9_]*$/ ? $key : "'$key'";
780 if (defined $value) {
781 # Quote things for a '' string
782 $value =~ s!\\!\\\\!g;
785 if ($key eq 'otherlibdirs') {
786 $value = "join (':', map {relocate_inc(\$_)} split (':', $value))";
787 } elsif ($need_relocation{$key}) {
788 $value = "relocate_inc($value)";
793 $Common{$key} = "$qkey => $value";
796 if ($Common{byteorder}) {
797 $Common{byteorder} = 'byteorder => $byteorder';
799 my $fast_config = join '', map { " $_,\n" } sort values %Common;
801 # Sanity check needed to stop an infinite loop if Config_heavy.pl fails to
802 # define &launcher for some reason (eg it got truncated)
803 $config_txt .= sprintf <<'ENDOFTIE', $fast_config;
808 require 'Config_heavy.pl';
809 goto \&launcher unless $Config::AUTOLOAD =~ /launcher$/;
810 die "&Config::AUTOLOAD failed on $Config::AUTOLOAD";
813 # tie returns the object, so the value returned to require will be true.
814 tie %%Config, 'Config', {
819 open(CONFIG_POD, ">$Config_POD") or die "Can't open $Config_POD: $!";
820 print CONFIG_POD <<'ENDOFTAIL';
823 Config - access Perl configuration information
828 if ($Config{usethreads}) {
829 print "has thread support\n"
832 use Config qw(myconfig config_sh config_vars config_re);
840 config_vars(qw(osname archname));
845 The Config module contains all the information that was available to
846 the C<Configure> program at Perl build time (over 900 values).
848 Shell variables from the F<config.sh> file (written by Configure) are
849 stored in the readonly-variable C<%Config>, indexed by their names.
851 Values stored in config.sh as 'undef' are returned as undefined
852 values. The perl C<exists> function can be used to check if a
853 named variable exists.
855 For a description of the variables, please have a look at the
856 Glossary file, as written in the Porting folder, or use the url:
857 http://perl5.git.perl.org/perl.git/blob/HEAD:/Porting/Glossary
863 Returns a textual summary of the major perl configuration values.
864 See also C<-V> in L<perlrun/Command Switches>.
868 Returns the entire perl configuration information in the form of the
869 original config.sh shell variable assignment script.
871 =item config_re($regex)
873 Like config_sh() but returns, as a list, only the config entries who's
874 names match the $regex.
876 =item config_vars(@names)
878 Prints to STDOUT the values of the named configuration variable. Each is
879 printed on a separate line in the form:
883 Names which are unknown are output as C<name='UNKNOWN';>.
884 See also C<-V:name> in L<perlrun/Command Switches>.
886 =item bincompat_options()
888 Returns a list of C pre-processor options used when compiling this F<perl>
889 binary, which affect its binary compatibility with extensions.
890 C<bincompat_options()> and C<non_bincompat_options()> are shown together in
891 the output of C<perl -V> as I<Compile-time options>.
893 =item non_bincompat_options()
895 Returns a list of C pre-processor options used when compiling this F<perl>
896 binary, which do not affect binary compatibility with extensions.
900 Returns the compile date (as a string), equivalent to what is shown by
903 =item local_patches()
905 Returns a list of the names of locally applied patches, equivalent to what
906 is shown by C<perl -V>.
910 Returns a list of the header files that should be used as dependencies for
911 XS code, for this version of Perl on this platform.
917 Here's a more sophisticated example of using %Config:
924 unless($Config{sig_name} && $Config{sig_num}) {
927 my @names = split ' ', $Config{sig_name};
928 @sig_num{@names} = split ' ', $Config{sig_num};
930 $sig_name[$sig_num{$_}] ||= $_;
934 print "signal #17 = $sig_name[17]\n";
935 if ($sig_num{ALRM}) {
936 print "SIGALRM is $sig_num{ALRM}\n";
941 Because this information is not stored within the perl executable
942 itself it is possible (but unlikely) that the information does not
943 relate to the actual perl binary which is being used to access it.
945 The Config module is installed into the architecture and version
946 specific library directory ($Config{installarchlib}) and it checks the
947 perl version number when loaded.
949 The values stored in config.sh may be either single-quoted or
950 double-quoted. Double-quoted strings are handy for those cases where you
951 need to include escape sequences in the strings. To avoid runtime variable
952 interpolation, any C<$> and C<@> characters are replaced by C<\$> and
953 C<\@>, respectively. This isn't foolproof, of course, so don't embed C<\$>
954 or C<\@> in double-quoted strings unless you're willing to deal with the
955 consequences. (The slashes will end up escaped and the C<$> or C<@> will
956 trigger variable interpolation)
960 Most C<Config> variables are determined by the C<Configure> script
961 on platforms supported by it (which is most UNIX platforms). Some
962 platforms have custom-made C<Config> variables, and may thus not have
963 some of the variables described below, or may have extraneous variables
964 specific to that particular port. See the port specific documentation
971 if ($Opts{glossary}) {
972 open(GLOS, "<$Glossary") or die "Can't open $Glossary: $!";
980 if (s/\A(\w*)\s+\(([\w.]+)\):\s*\n(\t?)/=item C<$1>\n\nFrom F<$2>:\n\n/m) {
981 my $c = substr $1, 0, 1;
982 unless ($seen{$c}++) {
983 print CONFIG_POD <<EOF if $text;
989 print CONFIG_POD <<EOF;
1000 elsif (!$text || !/\A\t/) {
1001 warn "Expected a Configure variable header",
1002 ($text ? " or another paragraph of description" : () ),
1003 ", instead we got:\n$_";
1006 s/n't/n\00t/g; # leave can't, won't etc untouched
1007 s/^\t\s+(.*)/\n$1/gm; # Indented lines ===> new paragraph
1008 s/^(?<!\n\n)\t(.*)/$1/gm; # Not indented lines ===> text
1009 s{([\'\"])(?=[^\'\"\s]*[./][^\'\"\s]*\1)([^\'\"\s]+)\1}(F<$2>)g; # '.o'
1010 s{([\'\"])([^\'\"\s]+)\1}(C<$2>)g; # "date" command
1011 s{\'([A-Za-z_\- *=/]+)\'}(C<$1>)g; # 'ln -s'
1013 (?<! [\w./<\'\"\$] ) # Only standalone file names
1014 (?! e \. g \. ) # Not e.g.
1015 (?! \. \. \. ) # Not ...
1016 (?! \d ) # Not 5.004
1017 (?! read/ ) # Not read/write
1018 (?! etc\. ) # Not etc.
1021 \$ ? # Allow leading $
1022 [\w./]* [./] [\w./]* # Require . or / inside
1024 (?<! \. (?= [\s)] ) ) # Do not include trailing dot
1025 (?! [\w/] ) # Include all of it
1027 (F<$1>)xg; # /usr/local
1028 s/((?<=\s)~\w*)/F<$1>/g; # ~name
1029 s/(?<![.<\'\"])\b([A-Z_]{2,})\b(?![\'\"])/C<$1>/g; # UNISTD
1030 s/(?<![.<\'\"])\b(?!the\b)(\w+)\s+macro\b/C<$1> macro/g; # FILE_cnt macro
1031 s/n[\0]t/n't/g; # undo can't, won't damage
1034 if ($Opts{glossary}) {
1035 <GLOS>; # Skip the "DO NOT EDIT"
1036 <GLOS>; # Skip the preamble
1042 die "Errors encountered while processing $Glossary. ",
1043 "Header lines are expected to be of the form:\n",
1045 "Maybe there is a malformed header?\n",
1050 print CONFIG_POD <<'ENDOFTAIL';
1056 Information on the git commit from which the current perl binary was compiled
1057 can be found in the variable C<$Config::Git_Data>. The variable is a
1058 structured string that looks something like this:
1060 git_commit_id='ea0c2dbd5f5ac6845ecc7ec6696415bf8e27bd52'
1061 git_describe='GitLive-blead-1076-gea0c2db'
1062 git_branch='smartmatch'
1063 git_uncommitted_changes=''
1064 git_commit_id_title='Commit id:'
1065 git_commit_date='2009-05-09 17:47:31 +0200'
1067 Its format is not guaranteed not to change over time.
1071 This module contains a good example of how to use tie to implement a
1072 cache and an example of how to make a tied variable readonly to those
1079 close(GLOS) if $Opts{glossary};
1081 print "written $Config_POD\n";
1083 my $orig_config_txt = "";
1084 my $orig_heavy_txt = "";
1088 $orig_config_txt = <$fh> if open $fh, "<", $Config_PM;
1089 $orig_heavy_txt = <$fh> if open $fh, "<", $Config_heavy;
1092 if ($orig_config_txt ne $config_txt or $orig_heavy_txt ne $heavy_txt) {
1093 open CONFIG, ">", $Config_PM or die "Can't open $Config_PM: $!\n";
1094 open CONFIG_HEAVY, ">", $Config_heavy or die "Can't open $Config_heavy: $!\n";
1095 print CONFIG $config_txt;
1096 print CONFIG_HEAVY $heavy_txt;
1097 close(CONFIG_HEAVY);
1099 print "updated $Config_PM\n";
1100 print "updated $Config_heavy\n";
1103 # Now do some simple tests on the Config.pm file we have created
1104 unshift(@INC,'lib');
1106 require $Config_heavy;
1109 die "$0: $Config_PM not valid"
1110 unless $Config{'PERL_CONFIG_SH'} eq 'true';
1112 die "$0: error processing $Config_PM"
1113 if defined($Config{'an impossible name'})
1114 or $Config{'PERL_CONFIG_SH'} ne 'true' # test cache
1117 die "$0: error processing $Config_PM"
1118 if eval '$Config{"cc"} = 1'
1119 or eval 'delete $Config{"cc"}'
1124 # Popularity of various entries in %Config, based on a large build and test
1125 # run of code in the Fotango build system:
1143 inc_version_list: 783
1146 usevendorprefix: 642
1167 installsiteman1dir: 489
1168 installsiteman3dir: 489
1169 installvendorman1dir: 489
1170 installvendorman3dir: 489
1174 installsitearch: 344
1179 installprefixexp: 336
1182 installvendorarch: 336
1183 installvendorbin: 336
1184 installvendorlib: 336