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) . ")";
146 # This is somewhat grim, but I want the code for parsing config.sh here and
147 # now so that I can expand $Config{ivsize} and $Config{ivtype}
149 my $fetch_string = <<'EOT';
151 # Search for it in the big string
153 my($self, $key) = @_;
155 my $quote_type = "'";
156 my $marker = "$key=";
158 # Check for the common case, ' delimited
159 my $start = index($Config_SH_expanded, "\n$marker$quote_type");
160 # If that failed, check for " delimited
163 $start = index($Config_SH_expanded, "\n$marker$quote_type");
165 # Start can never be -1 now, as we've rigged the long string we're
166 # searching with an initial dummy newline.
167 return undef if $start == -1;
169 $start += length($marker) + 2;
171 my $value = substr($Config_SH_expanded, $start,
172 index($Config_SH_expanded, "$quote_type\n", $start)
175 # If we had a double-quote, we'd better eval it so escape
176 # sequences and such can be interpolated. Since the incoming
177 # value is supposed to follow shell rules and not perl rules,
178 # we escape any perl variable markers
179 if ($quote_type eq '"') {
180 $value =~ s/\$/\\\$/g;
181 $value =~ s/\@/\\\@/g;
182 eval "\$value = \"$value\"";
185 # So we can say "if $Config{'foo'}".
186 $value = undef if $value eq 'undef';
187 $self->{$key} = $value; # cache it
196 open(CONFIG_SH, 'config.sh') || die "Can't open config.sh: $!";
197 while (<CONFIG_SH>) {
198 next if m:^#!/bin/sh:;
200 # Catch PERL_CONFIG_SH=true and PERL_VERSION=n line from Configure.
201 s/^(\w+)=(true|\d+)\s*$/$1='$2'\n/ or m/^(\w+)='(.*)'$/;
202 my($k, $v) = ($1, $2);
204 # grandfather PATCHLEVEL and SUBVERSION and CONFIG
206 if ($k eq 'PERL_VERSION') {
207 push @v_others, "PATCHLEVEL='$v'\n";
209 elsif ($k eq 'PERL_SUBVERSION') {
210 push @v_others, "SUBVERSION='$v'\n";
212 elsif ($k eq 'PERL_CONFIG_SH') {
213 push @v_others, "CONFIG='$v'\n";
217 # We can delimit things in config.sh with either ' or ".
218 unless ($in_v or m/^(\w+)=(['"])(.*\n)/){
219 push(@non_v, "#$_"); # not a name='value' line
227 ($name,$val) = ($1,$3);
229 $in_v = $val !~ /$quote\n/;
232 s,/,::,g if $Extensions{$name};
234 $val =~ s/$quote\n?\z//;
236 my $line = "$name=$quote$val$quote\n";
237 if (!$Common{$name}){
238 push(@v_others, $line);
241 push(@v_fast, $line);
248 # Calculation for the keys for byteorder
249 # This is somewhat grim, but I need to run fetch_string here.
250 our $Config_SH_expanded = join "\n", '', @v_fast, @v_others;
252 my $t = fetch_string ({}, 'ivtype');
253 my $s = fetch_string ({}, 'ivsize');
255 # byteorder does exist on its own but we overlay a virtual
256 # dynamically recomputed value.
258 # However, ivtype and ivsize will not vary for sane fat binaries
260 my $f = $t eq 'long' ? 'L!' : $s == 8 ? 'Q': 'I';
263 if ($s == 4 || $s == 8) {
264 my $list = join ',', reverse(2..$s);
266 $byteorder_code = <<"EOT";
268 foreach my \$c ($list) { \$i |= ord(\$c); \$i <<= 8 }
270 our \$byteorder = join('', unpack('$format', pack('$f', \$i)));
273 $byteorder_code = "our \$byteorder = '?'x$s;\n";
275 print CONFIG $byteorder_code;
277 print CONFIG_HEAVY @non_v, "\n";
279 # copy config summary format from the myconfig.SH script
280 print CONFIG_HEAVY "our \$summary : unique = <<'!END!';\n";
281 open(MYCONFIG,"<myconfig.SH") || die "open myconfig.SH failed: $!";
282 1 while defined($_ = <MYCONFIG>) && !/^Summary of/;
283 do { print CONFIG_HEAVY $_ } until !defined($_ = <MYCONFIG>) || /^\s*$/;
286 # NB. as $summary is unique, we need to copy it in a lexical variable
287 # before expanding it, because may have been made readonly if a perl
288 # interpreter has been cloned.
290 print CONFIG_HEAVY "\n!END!\n", <<'EOT';
291 my $summary_expanded;
294 return $summary_expanded if $summary_expanded;
295 ($summary_expanded = $summary) =~ s{\$(\w+)}
296 { my $c = $Config::Config{$1}; defined($c) ? $c : 'undef' }ge;
304 print CONFIG_HEAVY join("", @v_fast, sort @v_others);
306 print CONFIG_HEAVY <<'EOT';
308 s/(byteorder=)(['"]).*?\2/$1$2$Config::byteorder$2/m;
310 my $config_sh_len = length $_;
312 our $Config_SH_expanded : unique = "\n$_" . << 'EOVIRTUAL';
315 foreach my $prefix (qw(ccflags ldflags)) {
316 my $value = fetch_string ({}, $prefix);
317 my $withlargefiles = fetch_string ({}, $prefix . "_uselargefiles");
318 $value =~ s/\Q$withlargefiles\E\b//;
319 print CONFIG_HEAVY "${prefix}_nolargefiles='$value'\n";
322 foreach my $prefix (qw(libs libswanted)) {
323 my $value = fetch_string ({}, $prefix);
325 = split(' ', fetch_string ({}, 'libswanted_uselargefiles'));
328 @lflibswanted{@lflibswanted} = ();
329 if ($prefix eq 'libs') {
330 my @libs = grep { /^-l(.+)/ &&
331 not exists $lflibswanted{$1} }
332 split(' ', fetch_string ({}, 'libs'));
333 $value = join(' ', @libs);
335 my @libswanted = grep { not exists $lflibswanted{$_} }
336 split(' ', fetch_string ({}, 'libswanted'));
337 $value = join(' ', @libswanted);
340 print CONFIG_HEAVY "${prefix}_nolargefiles='$value'\n";
343 print CONFIG_HEAVY "EOVIRTUAL\n";
345 print CONFIG_HEAVY $fetch_string;
347 print CONFIG <<'ENDOFEND';
350 my($self, $key) = @_;
352 # check for cached value (which may be undef so we use exists not defined)
353 return $self->{$key} if exists $self->{$key};
355 return $self->fetch_string($key);
359 print CONFIG_HEAVY <<'ENDOFEND';
364 substr($Config_SH_expanded, 1, index($Config_SH_expanded, '=') - 1 );
368 # Find out how the current key's quoted so we can skip to its end.
369 my $quote = substr($Config_SH_expanded,
370 index($Config_SH_expanded, "=", $prevpos)+1, 1);
371 my $pos = index($Config_SH_expanded, qq($quote\n), $prevpos) + 2;
372 my $len = index($Config_SH_expanded, "=", $pos) - $pos;
374 $len > 0 ? substr($Config_SH_expanded, $pos, $len) : undef;
378 return 1 if exists($_[0]->{$_[1]});
380 return(index($Config_SH_expanded, "\n$_[1]='") != -1 or
381 index($Config_SH_expanded, "\n$_[1]=\"") != -1
385 sub STORE { die "\%Config::Config is read-only\n" }
391 substr $Config_SH_expanded, 1, $config_sh_len;
396 return map { chomp; $_ } grep eval{ /^(?:$re)=/ }, split /^/,
401 # implements -V:cfgvar option (see perlrun -V:)
403 # find optional leading, trailing colons; and query-spec
404 my ($notag,$qry,$lncont) = m/^(:)?(.*?)(:)?$/; # flags fore and aft,
405 # map colon-flags to print decorations
406 my $prfx = $notag ? '': "$qry="; # tag-prefix for print
407 my $lnend = $lncont ? ' ' : ";\n"; # line ending for print
409 # all config-vars are by definition \w only, any \W means regex
411 my @matches = config_re($qry);
412 print map "$_$lnend", @matches ? @matches : "$qry: not found" if !$notag;
413 print map { s/\w+=//; "$_$lnend" } @matches ? @matches : "$qry: not found" if $notag;
415 my $v = (exists $Config::Config{$qry}) ? $Config::Config{$qry}
417 $v = 'undef' unless defined $v;
418 print "${prfx}'${v}'$lnend";
423 # Called by the real AUTOLOAD
426 goto \&$Config::AUTOLOAD;
433 print CONFIG <<'ENDOFSET';
436 my ($value, $v) = $Config_SH_expanded =~ m/^used_aout='(.*)'\s*$/m;
437 for (split ' ', $value) {
438 ($v) = $Config_SH_expanded =~ m/^aout_$_='(.*)'\s*$/m;
439 $preconfig{$_} = $v eq 'undef' ? undef : $v;
442 $preconfig{d_fork} = undef unless $OS2::can_fork; # Some funny cases can't
443 sub TIEHASH { bless {%preconfig} }
445 # Extract the name of the DLL from the makefile to avoid duplication
446 my ($f) = grep -r, qw(GNUMakefile Makefile);
448 if (open my $fh, '<', $f) {
450 $dll = $1, last if /^PERL_DLL_BASE\s*=\s*(\S*)\s*$/;
453 print CONFIG <<ENDOFSET if $dll;
454 \$preconfig{dll_name} = '$dll';
457 print CONFIG <<'ENDOFSET';
464 foreach my $key (keys %Common) {
465 my $value = fetch_string ({}, $key);
466 # Is it safe on the LHS of => ?
467 my $qkey = $key =~ /^[A-Za-z_][A-Za-z0-9_]*$/ ? $key : "'$key'";
468 if (defined $value) {
469 # Quote things for a '' string
470 $value =~ s!\\!\\\\!g;
476 $Common{$key} = "$qkey => $value";
478 my $fast_config = join '', map { " $_,\n" }
479 sort (values %Common, 'byteorder => $byteorder');
481 print CONFIG sprintf <<'ENDOFTIE', $fast_config;
486 require 'Config_heavy.pl';
488 die "&Config::AUTOLOAD failed on $Config::AUTOLOAD";
491 tie %%Config, 'Config', {
498 open(CONFIG_POD, ">lib/Config.pod") or die "Can't open lib/Config.pod: $!";
499 print CONFIG_POD <<'ENDOFTAIL';
502 Config - access Perl configuration information
507 if ($Config{usethreads}) {
508 print "has thread support\n"
511 use Config qw(myconfig config_sh config_vars config_re);
519 config_vars(qw(osname archname));
524 The Config module contains all the information that was available to
525 the C<Configure> program at Perl build time (over 900 values).
527 Shell variables from the F<config.sh> file (written by Configure) are
528 stored in the readonly-variable C<%Config>, indexed by their names.
530 Values stored in config.sh as 'undef' are returned as undefined
531 values. The perl C<exists> function can be used to check if a
532 named variable exists.
538 Returns a textual summary of the major perl configuration values.
539 See also C<-V> in L<perlrun/Switches>.
543 Returns the entire perl configuration information in the form of the
544 original config.sh shell variable assignment script.
546 =item config_re($regex)
548 Like config_sh() but returns, as a list, only the config entries who's
549 names match the $regex.
551 =item config_vars(@names)
553 Prints to STDOUT the values of the named configuration variable. Each is
554 printed on a separate line in the form:
558 Names which are unknown are output as C<name='UNKNOWN';>.
559 See also C<-V:name> in L<perlrun/Switches>.
565 Here's a more sophisticated example of using %Config:
572 unless($Config{sig_name} && $Config{sig_num}) {
575 my @names = split ' ', $Config{sig_name};
576 @sig_num{@names} = split ' ', $Config{sig_num};
578 $sig_name[$sig_num{$_}] ||= $_;
582 print "signal #17 = $sig_name[17]\n";
583 if ($sig_num{ALRM}) {
584 print "SIGALRM is $sig_num{ALRM}\n";
589 Because this information is not stored within the perl executable
590 itself it is possible (but unlikely) that the information does not
591 relate to the actual perl binary which is being used to access it.
593 The Config module is installed into the architecture and version
594 specific library directory ($Config{installarchlib}) and it checks the
595 perl version number when loaded.
597 The values stored in config.sh may be either single-quoted or
598 double-quoted. Double-quoted strings are handy for those cases where you
599 need to include escape sequences in the strings. To avoid runtime variable
600 interpolation, any C<$> and C<@> characters are replaced by C<\$> and
601 C<\@>, respectively. This isn't foolproof, of course, so don't embed C<\$>
602 or C<\@> in double-quoted strings unless you're willing to deal with the
603 consequences. (The slashes will end up escaped and the C<$> or C<@> will
604 trigger variable interpolation)
608 Most C<Config> variables are determined by the C<Configure> script
609 on platforms supported by it (which is most UNIX platforms). Some
610 platforms have custom-made C<Config> variables, and may thus not have
611 some of the variables described below, or may have extraneous variables
612 specific to that particular port. See the port specific documentation
617 if ($Opts{glossary}) {
618 open(GLOS, "<$Glossary") or die "Can't open $Glossary: $!";
625 if (s/\A(\w*)\s+\(([\w.]+)\):\s*\n(\t?)/=item C<$1>\n\nFrom F<$2>:\n\n/m) {
626 my $c = substr $1, 0, 1;
627 unless ($seen{$c}++) {
628 print CONFIG_POD <<EOF if $text;
632 print CONFIG_POD <<EOF;
641 elsif (!$text || !/\A\t/) {
642 warn "Expected a Configure variable header",
643 ($text ? " or another paragraph of description" : () );
645 s/n't/n\00t/g; # leave can't, won't etc untouched
646 s/^\t\s+(.*)/\n$1/gm; # Indented lines ===> new paragraph
647 s/^(?<!\n\n)\t(.*)/$1/gm; # Not indented lines ===> text
648 s{([\'\"])(?=[^\'\"\s]*[./][^\'\"\s]*\1)([^\'\"\s]+)\1}(F<$2>)g; # '.o'
649 s{([\'\"])([^\'\"\s]+)\1}(C<$2>)g; # "date" command
650 s{\'([A-Za-z_\- *=/]+)\'}(C<$1>)g; # 'ln -s'
652 (?<! [\w./<\'\"] ) # Only standalone file names
653 (?! e \. g \. ) # Not e.g.
654 (?! \. \. \. ) # Not ...
656 (?! read/ ) # Not read/write
657 (?! etc\. ) # Not etc.
660 \$ ? # Allow leading $
661 [\w./]* [./] [\w./]* # Require . or / inside
663 (?<! \. (?= [\s)] ) ) # Do not include trailing dot
664 (?! [\w/] ) # Include all of it
666 (F<$1>)xg; # /usr/local
667 s/((?<=\s)~\w*)/F<$1>/g; # ~name
668 s/(?<![.<\'\"])\b([A-Z_]{2,})\b(?![\'\"])/C<$1>/g; # UNISTD
669 s/(?<![.<\'\"])\b(?!the\b)(\w+)\s+macro\b/C<$1> macro/g; # FILE_cnt macro
670 s/n[\0]t/n't/g; # undo can't, won't damage
673 if ($Opts{glossary}) {
674 <GLOS>; # Skip the "DO NOT EDIT"
675 <GLOS>; # Skip the preamble
682 print CONFIG_POD <<'ENDOFTAIL';
688 This module contains a good example of how to use tie to implement a
689 cache and an example of how to make a tied variable readonly to those
701 # Now create Cross.pm if needed
703 open CROSS, ">lib/Cross.pm" or die "Can not open >lib/Cross.pm: $!";
705 # typical invocation:
706 # perl -MCross Makefile.PL
707 # perl -MCross=wince -V:cc
711 my ($package,$platform) = @_;
712 unless (defined $platform) {
713 # if $platform is not specified, then use last one when
714 # 'configpm; was invoked with --cross option
715 $platform = '***replace-marker***';
717 @INC = map {/\blib\b/?(do{local $_=$_;s/\blib\b/xlib\/$platform/;$_},$_):($_)} @INC;
718 $::Cross::platform = $platform;
723 $cross =~ s/\*\*\*replace-marker\*\*\*/$Opts{cross}/g;
728 # Now do some simple tests on the Config.pm file we have created
733 die "$0: $Config_PM not valid"
734 unless $Config{'PERL_CONFIG_SH'} eq 'true';
736 die "$0: error processing $Config_PM"
737 if defined($Config{'an impossible name'})
738 or $Config{'PERL_CONFIG_SH'} ne 'true' # test cache
741 die "$0: error processing $Config_PM"
742 if eval '$Config{"cc"} = 1'
743 or eval 'delete $Config{"cc"}'
748 # Popularity of various entries in %Config, based on a large build and test
749 # run of code in the Fotango build system:
767 inc_version_list: 783
791 installsiteman1dir: 489
792 installsiteman3dir: 489
793 installvendorman1dir: 489
794 installvendorman3dir: 489
803 installprefixexp: 336
806 installvendorarch: 336
807 installvendorbin: 336
808 installvendorlib: 336