3 use vars qw(%Config $Config_SH_expanded);
5 my $how_many_common = 22;
7 # commonly used names to precache (and hence lookup fastest)
10 while ($how_many_common--) {
13 /^(\S+):\s*(\d+)$/ or die "Malformed line '$_'";
17 # names of things which may need to have slashes changed to double-colons
18 my %Extensions = map {($_,$_)}
19 qw(dynamic_ext static_ext extensions known_extensions);
21 # allowed opts as well as specifies default and initial values
23 'cross' => '', # --cross=PLATFORM - crosscompiling for PLATFORM
24 'glossary' => 1, # --no-glossary - no glossary file inclusion,
26 'heavy' => '', # pathname of the Config_heavy.pl file
30 # user specified options
33 (map {/^--([\-_\w]+)=(.*)$/} @ARGV),
34 # --opt --no-opt --noopt
35 (map {/^no-?(.*)$/i?($1=>0):($_=>1)} map {/^--([\-_\w]+)$/} @ARGV),
38 my %opts = (%Allowed_Opts, %given_opts);
40 for my $opt (grep {!exists $Allowed_Opts{$_}} keys %given_opts) {
41 die "option '$opt' is not recognized";
43 @ARGV = grep {!/^--/} @ARGV;
51 my ($Config_PM, $Config_heavy);
52 my $Glossary = $ARGV[1] || 'Porting/Glossary';
55 # creating cross-platform config file
57 mkdir "xlib/$Opts{cross}";
58 $Config_PM = $ARGV[0] || "xlib/$Opts{cross}/Config.pm";
61 $Config_PM = $ARGV[0] || 'lib/Config.pm';
64 $Config_heavy = $Opts{heavy};
67 ($Config_heavy = $Config_PM) =~ s!\.pm$!_heavy.pl!;
68 die "Can't automatically determine name for Config_heavy.pl from '$Config_PM'"
69 if $Config_heavy eq $Config_PM;
72 open CONFIG, ">$Config_PM" or die "Can't open $Config_PM: $!\n";
73 open CONFIG_HEAVY, ">$Config_heavy" or die "Can't open $Config_heavy: $!\n";
75 print CONFIG_HEAVY <<'ENDOFBEG';
76 # This file was created by configpm when Perl was built. Any changes
77 # made to this file will be lost the next time perl is built.
81 # use warnings; Pulls in Carp
82 # use vars pulls in Carp
85 my $myver = sprintf "v%vd", $^V;
87 printf CONFIG <<'ENDOFBEG', ($myver) x 3;
88 # This file was created by configpm when Perl was built. Any changes
89 # made to this file will be lost the next time perl is built.
93 # use warnings; Pulls in Carp
94 # use vars pulls in Carp
95 @Config::EXPORT = qw(%%Config);
96 @Config::EXPORT_OK = qw(myconfig config_sh config_vars config_re);
98 # Need to stub all the functions to make code such as print Config::config_sh
106 my %%Export_Cache = map {($_ => 1)} (@Config::EXPORT, @Config::EXPORT_OK);
110 # Define our own import method to avoid pulling in the full Exporter:
113 @_ = @Config::EXPORT unless @_;
115 my @funcs = grep $_ ne '%%Config', @_;
116 my $export_Config = @funcs < @_ ? 1 : 0;
119 my $callpkg = caller(0);
120 foreach my $func (@funcs) {
121 die sprintf qq{"%%s" is not exported by the %%s module\n},
122 $func, __PACKAGE__ unless $Export_Cache{$func};
123 *{$callpkg.'::'.$func} = \&{$func};
126 *{"$callpkg\::Config"} = \%%Config if $export_Config;
130 die "Perl lib version (%s) doesn't match executable version ($])"
134 or die "Perl lib version (%s) doesn't match executable version (" .
135 sprintf("v%%vd",$^V) . ")";
149 open(CONFIG_SH, 'config.sh') || die "Can't open config.sh: $!";
150 while (<CONFIG_SH>) {
151 next if m:^#!/bin/sh:;
153 # Catch PERL_CONFIG_SH=true and PERL_VERSION=n line from Configure.
154 s/^(\w+)=(true|\d+)\s*$/$1='$2'\n/ or m/^(\w+)='(.*)'$/;
155 my($k, $v) = ($1, $2);
157 # grandfather PATCHLEVEL and SUBVERSION and CONFIG
159 if ($k eq 'PERL_VERSION') {
160 push @v_others, "PATCHLEVEL='$v'\n";
162 elsif ($k eq 'PERL_SUBVERSION') {
163 push @v_others, "SUBVERSION='$v'\n";
165 elsif ($k eq 'PERL_CONFIG_SH') {
166 push @v_others, "CONFIG='$v'\n";
170 # We can delimit things in config.sh with either ' or ".
171 unless ($in_v or m/^(\w+)=(['"])(.*\n)/){
172 push(@non_v, "#$_"); # not a name='value' line
180 ($name,$val) = ($1,$3);
182 $in_v = $val !~ /$quote\n/;
185 s,/,::,g if $Extensions{$name};
187 $val =~ s/$quote\n?\z//;
189 my $line = "$name=$quote$val$quote\n";
190 push(@v_others, $line);
191 $seen_quotes{$quote}++;
196 # This is somewhat grim, but I want the code for parsing config.sh here and
197 # now so that I can expand $Config{ivsize} and $Config{ivtype}
199 my $fetch_string = <<'EOT';
201 # Search for it in the big string
203 my($self, $key) = @_;
207 if ($seen_quotes{'"'}) {
208 # We need the full ' and " code
209 $fetch_string .= <<'EOT';
210 my $quote_type = "'";
211 my $marker = "$key=";
213 # Check for the common case, ' delimited
214 my $start = index($Config_SH_expanded, "\n$marker$quote_type");
215 # If that failed, check for " delimited
218 $start = index($Config_SH_expanded, "\n$marker$quote_type");
222 $fetch_string .= <<'EOT';
223 # We only have ' delimted.
224 my $start = index($Config_SH_expanded, "\n$key=\'");
227 $fetch_string .= <<'EOT';
228 # Start can never be -1 now, as we've rigged the long string we're
229 # searching with an initial dummy newline.
230 return undef if $start == -1;
232 $start += length($key) + 3;
235 if (!$seen_quotes{'"'}) {
236 # Don't need the full ' and " code, or the eval expansion.
237 $fetch_string .= <<'EOT';
238 my $value = substr($Config_SH_expanded, $start,
239 index($Config_SH_expanded, "'\n", $start)
243 $fetch_string .= <<'EOT';
244 my $value = substr($Config_SH_expanded, $start,
245 index($Config_SH_expanded, "$quote_type\n", $start)
248 # If we had a double-quote, we'd better eval it so escape
249 # sequences and such can be interpolated. Since the incoming
250 # value is supposed to follow shell rules and not perl rules,
251 # we escape any perl variable markers
252 if ($quote_type eq '"') {
253 $value =~ s/\$/\\\$/g;
254 $value =~ s/\@/\\\@/g;
255 eval "\$value = \"$value\"";
259 $fetch_string .= <<'EOT';
260 # So we can say "if $Config{'foo'}".
261 $value = undef if $value eq 'undef';
262 $self->{$key} = $value; # cache it
269 # Calculation for the keys for byteorder
270 # This is somewhat grim, but I need to run fetch_string here.
271 our $Config_SH_expanded = join "\n", '', @v_others;
273 my $t = fetch_string ({}, 'ivtype');
274 my $s = fetch_string ({}, 'ivsize');
276 # byteorder does exist on its own but we overlay a virtual
277 # dynamically recomputed value.
279 # However, ivtype and ivsize will not vary for sane fat binaries
281 my $f = $t eq 'long' ? 'L!' : $s == 8 ? 'Q': 'I';
284 if ($s == 4 || $s == 8) {
285 my $list = join ',', reverse(2..$s);
287 $byteorder_code = <<"EOT";
290 foreach my \$c ($list) { \$i |= ord(\$c); \$i <<= 8 }
292 our \$byteorder = join('', unpack('$format', pack('$f', \$i)));
295 $byteorder_code = "our \$byteorder = '?'x$s;\n";
300 if (fetch_string({},'userelocatableinc')) {
301 foreach my $what (qw(archlibexp
309 push @need_relocation, $what if fetch_string({}, $what) =~ m!^\.\.\./!;
314 @need_relocation{@need_relocation} = @need_relocation;
316 # This can have .../ anywhere:
317 if (fetch_string({}, 'otherlibdirs') =~ m!\.\.\./!) {
318 $need_relocation{otherlibdirs} = 'otherlibdirs';
321 my $relocation_code = <<'EOT';
325 return $libdir unless $libdir =~ s!^\.\.\./!!;
327 if ($prefix =~ s!/[^/]*$!!) {
328 while ($libdir =~ m!^\.\./!) {
329 # Loop while $libdir starts "../" and $prefix still has a trailing
331 last unless $prefix =~ s!/([^/]+)$!!;
332 # but bail out if the directory we picked off the end of $prefix is .
334 if ($1 eq '.' or $1 eq '..') {
335 # Undo! This should be rare, hence code it this way rather than a
336 # check each time before the s!!! above.
337 $prefix = "$prefix/$1";
340 # Remove that leading ../ and loop again
341 substr ($libdir, 0, 3, '');
343 $libdir = "$prefix/$libdir";
349 if (%need_relocation) {
350 my $relocations_in_common;
351 # otherlibdirs only features in the hash
352 foreach (keys %need_relocation) {
353 $relocations_in_common++ if $Common{$_};
355 if ($relocations_in_common) {
356 print CONFIG $relocation_code;
358 print CONFIG_HEAVY $relocation_code;
362 print CONFIG_HEAVY @non_v, "\n";
364 # copy config summary format from the myconfig.SH script
365 print CONFIG_HEAVY "our \$summary : unique = <<'!END!';\n";
366 open(MYCONFIG,"<myconfig.SH") || die "open myconfig.SH failed: $!";
367 1 while defined($_ = <MYCONFIG>) && !/^Summary of/;
368 do { print CONFIG_HEAVY $_ } until !defined($_ = <MYCONFIG>) || /^\s*$/;
371 # NB. as $summary is unique, we need to copy it in a lexical variable
372 # before expanding it, because may have been made readonly if a perl
373 # interpreter has been cloned.
375 print CONFIG_HEAVY "\n!END!\n", <<'EOT';
376 my $summary_expanded;
379 return $summary_expanded if $summary_expanded;
380 ($summary_expanded = $summary) =~ s{\$(\w+)}
381 { my $c = $Config::Config{$1}; defined($c) ? $c : 'undef' }ge;
389 print CONFIG_HEAVY join('', sort @v_others), "!END!\n";
391 # Only need the dynamic byteorder code in Config.pm if 'byteorder' is one of
393 if ($Common{byteorder}) {
394 print CONFIG $byteorder_code;
396 print CONFIG_HEAVY $byteorder_code;
399 if (@need_relocation) {
400 print CONFIG_HEAVY 'foreach my $what (qw(', join (' ', @need_relocation),
402 s/^($what=)(['"])(.*?)\2/$1 . $2 . relocate_inc($3) . $2/me;
405 # Currently it only makes sense to do the ... relocation on Unix, so there's
406 # no need to emulate the "which separator for this platform" logic in perl.c -
407 # ':' will always be applicable
408 if ($need_relocation{otherlibdirs}) {
409 print CONFIG_HEAVY << 'EOT';
410 s{^(otherlibdirs=)(['"])(.*?)\2}
411 {$1 . $2 . join ':', map {relocate_inc($_)} split ':', $3 . $2}me;
416 print CONFIG_HEAVY <<'EOT';
417 s/(byteorder=)(['"]).*?\2/$1$2$Config::byteorder$2/m;
419 my $config_sh_len = length $_;
421 our $Config_SH_expanded : unique = "\n$_" . << 'EOVIRTUAL';
424 foreach my $prefix (qw(ccflags ldflags)) {
425 my $value = fetch_string ({}, $prefix);
426 my $withlargefiles = fetch_string ({}, $prefix . "_uselargefiles");
427 $value =~ s/\Q$withlargefiles\E\b//;
428 print CONFIG_HEAVY "${prefix}_nolargefiles='$value'\n";
431 foreach my $prefix (qw(libs libswanted)) {
432 my $value = fetch_string ({}, $prefix);
434 = split(' ', fetch_string ({}, 'libswanted_uselargefiles'));
437 @lflibswanted{@lflibswanted} = ();
438 if ($prefix eq 'libs') {
439 my @libs = grep { /^-l(.+)/ &&
440 not exists $lflibswanted{$1} }
441 split(' ', fetch_string ({}, 'libs'));
442 $value = join(' ', @libs);
444 my @libswanted = grep { not exists $lflibswanted{$_} }
445 split(' ', fetch_string ({}, 'libswanted'));
446 $value = join(' ', @libswanted);
449 print CONFIG_HEAVY "${prefix}_nolargefiles='$value'\n";
452 print CONFIG_HEAVY "EOVIRTUAL\n";
454 print CONFIG_HEAVY $fetch_string;
456 print CONFIG <<'ENDOFEND';
459 my($self, $key) = @_;
461 # check for cached value (which may be undef so we use exists not defined)
462 return $self->{$key} if exists $self->{$key};
464 return $self->fetch_string($key);
468 print CONFIG_HEAVY <<'ENDOFEND';
474 substr($Config_SH_expanded, 1, index($Config_SH_expanded, '=') - 1 );
479 if ($seen_quotes{'"'}) {
480 print CONFIG_HEAVY <<'ENDOFEND';
481 # Find out how the current key's quoted so we can skip to its end.
482 my $quote = substr($Config_SH_expanded,
483 index($Config_SH_expanded, "=", $prevpos)+1, 1);
484 my $pos = index($Config_SH_expanded, qq($quote\n), $prevpos) + 2;
487 # Just ' quotes, so it's much easier.
488 print CONFIG_HEAVY <<'ENDOFEND';
489 my $pos = index($Config_SH_expanded, qq('\n), $prevpos) + 2;
492 print CONFIG_HEAVY <<'ENDOFEND';
493 my $len = index($Config_SH_expanded, "=", $pos) - $pos;
495 $len > 0 ? substr($Config_SH_expanded, $pos, $len) : undef;
499 return 1 if exists($_[0]->{$_[1]});
501 return(index($Config_SH_expanded, "\n$_[1]='") != -1
503 if ($seen_quotes{'"'}) {
504 print CONFIG_HEAVY <<'ENDOFEND';
505 or index($Config_SH_expanded, "\n$_[1]=\"") != -1
508 print CONFIG_HEAVY <<'ENDOFEND';
512 sub STORE { die "\%Config::Config is read-only\n" }
518 substr $Config_SH_expanded, 1, $config_sh_len;
523 return map { chomp; $_ } grep eval{ /^(?:$re)=/ }, split /^/,
528 # implements -V:cfgvar option (see perlrun -V:)
530 # find optional leading, trailing colons; and query-spec
531 my ($notag,$qry,$lncont) = m/^(:)?(.*?)(:)?$/; # flags fore and aft,
532 # map colon-flags to print decorations
533 my $prfx = $notag ? '': "$qry="; # tag-prefix for print
534 my $lnend = $lncont ? ' ' : ";\n"; # line ending for print
536 # all config-vars are by definition \w only, any \W means regex
538 my @matches = config_re($qry);
539 print map "$_$lnend", @matches ? @matches : "$qry: not found" if !$notag;
540 print map { s/\w+=//; "$_$lnend" } @matches ? @matches : "$qry: not found" if $notag;
542 my $v = (exists $Config::Config{$qry}) ? $Config::Config{$qry}
544 $v = 'undef' unless defined $v;
545 print "${prfx}'${v}'$lnend";
550 # Called by the real AUTOLOAD
553 goto \&$Config::AUTOLOAD;
560 print CONFIG <<'ENDOFSET';
563 my ($value, $v) = $Config_SH_expanded =~ m/^used_aout='(.*)'\s*$/m;
564 for (split ' ', $value) {
565 ($v) = $Config_SH_expanded =~ m/^aout_$_='(.*)'\s*$/m;
566 $preconfig{$_} = $v eq 'undef' ? undef : $v;
569 $preconfig{d_fork} = undef unless $OS2::can_fork; # Some funny cases can't
570 sub TIEHASH { bless {%preconfig} }
572 # Extract the name of the DLL from the makefile to avoid duplication
573 my ($f) = grep -r, qw(GNUMakefile Makefile);
575 if (open my $fh, '<', $f) {
577 $dll = $1, last if /^PERL_DLL_BASE\s*=\s*(\S*)\s*$/;
580 print CONFIG <<ENDOFSET if $dll;
581 \$preconfig{dll_name} = '$dll';
584 print CONFIG <<'ENDOFSET';
591 foreach my $key (keys %Common) {
592 my $value = fetch_string ({}, $key);
593 # Is it safe on the LHS of => ?
594 my $qkey = $key =~ /^[A-Za-z_][A-Za-z0-9_]*$/ ? $key : "'$key'";
595 if (defined $value) {
596 # Quote things for a '' string
597 $value =~ s!\\!\\\\!g;
600 if ($key eq 'otherlibdirs') {
601 $value = "join (':', map {relocate_inc(\$_)} split (':', $value))";
602 } elsif ($need_relocation{$key}) {
603 $value = "relocate_inc($value)";
608 $Common{$key} = "$qkey => $value";
611 if ($Common{byteorder}) {
612 $Common{byteorder} = 'byteorder => $byteorder';
614 my $fast_config = join '', map { " $_,\n" } sort values %Common;
616 print CONFIG sprintf <<'ENDOFTIE', $fast_config;
621 require 'Config_heavy.pl';
623 die "&Config::AUTOLOAD failed on $Config::AUTOLOAD";
626 # tie returns the object, so the value returned to require will be true.
627 tie %%Config, 'Config', {
632 open(CONFIG_POD, ">lib/Config.pod") or die "Can't open lib/Config.pod: $!";
633 print CONFIG_POD <<'ENDOFTAIL';
636 Config - access Perl configuration information
641 if ($Config{usethreads}) {
642 print "has thread support\n"
645 use Config qw(myconfig config_sh config_vars config_re);
653 config_vars(qw(osname archname));
658 The Config module contains all the information that was available to
659 the C<Configure> program at Perl build time (over 900 values).
661 Shell variables from the F<config.sh> file (written by Configure) are
662 stored in the readonly-variable C<%Config>, indexed by their names.
664 Values stored in config.sh as 'undef' are returned as undefined
665 values. The perl C<exists> function can be used to check if a
666 named variable exists.
672 Returns a textual summary of the major perl configuration values.
673 See also C<-V> in L<perlrun/Switches>.
677 Returns the entire perl configuration information in the form of the
678 original config.sh shell variable assignment script.
680 =item config_re($regex)
682 Like config_sh() but returns, as a list, only the config entries who's
683 names match the $regex.
685 =item config_vars(@names)
687 Prints to STDOUT the values of the named configuration variable. Each is
688 printed on a separate line in the form:
692 Names which are unknown are output as C<name='UNKNOWN';>.
693 See also C<-V:name> in L<perlrun/Switches>.
699 Here's a more sophisticated example of using %Config:
706 unless($Config{sig_name} && $Config{sig_num}) {
709 my @names = split ' ', $Config{sig_name};
710 @sig_num{@names} = split ' ', $Config{sig_num};
712 $sig_name[$sig_num{$_}] ||= $_;
716 print "signal #17 = $sig_name[17]\n";
717 if ($sig_num{ALRM}) {
718 print "SIGALRM is $sig_num{ALRM}\n";
723 Because this information is not stored within the perl executable
724 itself it is possible (but unlikely) that the information does not
725 relate to the actual perl binary which is being used to access it.
727 The Config module is installed into the architecture and version
728 specific library directory ($Config{installarchlib}) and it checks the
729 perl version number when loaded.
731 The values stored in config.sh may be either single-quoted or
732 double-quoted. Double-quoted strings are handy for those cases where you
733 need to include escape sequences in the strings. To avoid runtime variable
734 interpolation, any C<$> and C<@> characters are replaced by C<\$> and
735 C<\@>, respectively. This isn't foolproof, of course, so don't embed C<\$>
736 or C<\@> in double-quoted strings unless you're willing to deal with the
737 consequences. (The slashes will end up escaped and the C<$> or C<@> will
738 trigger variable interpolation)
742 Most C<Config> variables are determined by the C<Configure> script
743 on platforms supported by it (which is most UNIX platforms). Some
744 platforms have custom-made C<Config> variables, and may thus not have
745 some of the variables described below, or may have extraneous variables
746 specific to that particular port. See the port specific documentation
751 if ($Opts{glossary}) {
752 open(GLOS, "<$Glossary") or die "Can't open $Glossary: $!";
759 if (s/\A(\w*)\s+\(([\w.]+)\):\s*\n(\t?)/=item C<$1>\n\nFrom F<$2>:\n\n/m) {
760 my $c = substr $1, 0, 1;
761 unless ($seen{$c}++) {
762 print CONFIG_POD <<EOF if $text;
766 print CONFIG_POD <<EOF;
775 elsif (!$text || !/\A\t/) {
776 warn "Expected a Configure variable header",
777 ($text ? " or another paragraph of description" : () );
779 s/n't/n\00t/g; # leave can't, won't etc untouched
780 s/^\t\s+(.*)/\n$1/gm; # Indented lines ===> new paragraph
781 s/^(?<!\n\n)\t(.*)/$1/gm; # Not indented lines ===> text
782 s{([\'\"])(?=[^\'\"\s]*[./][^\'\"\s]*\1)([^\'\"\s]+)\1}(F<$2>)g; # '.o'
783 s{([\'\"])([^\'\"\s]+)\1}(C<$2>)g; # "date" command
784 s{\'([A-Za-z_\- *=/]+)\'}(C<$1>)g; # 'ln -s'
786 (?<! [\w./<\'\"] ) # Only standalone file names
787 (?! e \. g \. ) # Not e.g.
788 (?! \. \. \. ) # Not ...
790 (?! read/ ) # Not read/write
791 (?! etc\. ) # Not etc.
794 \$ ? # Allow leading $
795 [\w./]* [./] [\w./]* # Require . or / inside
797 (?<! \. (?= [\s)] ) ) # Do not include trailing dot
798 (?! [\w/] ) # Include all of it
800 (F<$1>)xg; # /usr/local
801 s/((?<=\s)~\w*)/F<$1>/g; # ~name
802 s/(?<![.<\'\"])\b([A-Z_]{2,})\b(?![\'\"])/C<$1>/g; # UNISTD
803 s/(?<![.<\'\"])\b(?!the\b)(\w+)\s+macro\b/C<$1> macro/g; # FILE_cnt macro
804 s/n[\0]t/n't/g; # undo can't, won't damage
807 if ($Opts{glossary}) {
808 <GLOS>; # Skip the "DO NOT EDIT"
809 <GLOS>; # Skip the preamble
816 print CONFIG_POD <<'ENDOFTAIL';
822 This module contains a good example of how to use tie to implement a
823 cache and an example of how to make a tied variable readonly to those
835 # Now create Cross.pm if needed
837 open CROSS, ">lib/Cross.pm" or die "Can not open >lib/Cross.pm: $!";
839 # typical invocation:
840 # perl -MCross Makefile.PL
841 # perl -MCross=wince -V:cc
845 my ($package,$platform) = @_;
846 unless (defined $platform) {
847 # if $platform is not specified, then use last one when
848 # 'configpm; was invoked with --cross option
849 $platform = '***replace-marker***';
851 @INC = map {/\blib\b/?(do{local $_=$_;s/\blib\b/xlib\/$platform/;$_},$_):($_)} @INC;
852 $::Cross::platform = $platform;
857 $cross =~ s/\*\*\*replace-marker\*\*\*/$Opts{cross}/g;
862 # Now do some simple tests on the Config.pm file we have created
867 die "$0: $Config_PM not valid"
868 unless $Config{'PERL_CONFIG_SH'} eq 'true';
870 die "$0: error processing $Config_PM"
871 if defined($Config{'an impossible name'})
872 or $Config{'PERL_CONFIG_SH'} ne 'true' # test cache
875 die "$0: error processing $Config_PM"
876 if eval '$Config{"cc"} = 1'
877 or eval 'delete $Config{"cc"}'
882 # Popularity of various entries in %Config, based on a large build and test
883 # run of code in the Fotango build system:
901 inc_version_list: 783
925 installsiteman1dir: 489
926 installsiteman3dir: 489
927 installvendorman1dir: 489
928 installvendorman3dir: 489
937 installprefixexp: 336
940 installvendorarch: 336
941 installvendorbin: 336
942 installvendorlib: 336