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 my %%Export_Cache = map {($_ => 1)} (@Config::EXPORT, @Config::EXPORT_OK);
102 # Define our own import method to avoid pulling in the full Exporter:
105 @_ = @Config::EXPORT unless @_;
107 my @funcs = grep $_ ne '%%Config', @_;
108 my $export_Config = @funcs < @_ ? 1 : 0;
111 my $callpkg = caller(0);
112 foreach my $func (@funcs) {
113 die sprintf qq{"%%s" is not exported by the %%s module\n},
114 $func, __PACKAGE__ unless $Export_Cache{$func};
115 *{$callpkg.'::'.$func} = \&{$func};
118 *{"$callpkg\::Config"} = \%%Config if $export_Config;
122 die "Perl lib version (%s) doesn't match executable version ($])"
126 or die "Perl lib version (%s) doesn't match executable version (" .
127 sprintf("v%%vd",$^V) . ")";
138 # This is somewhat grim, but I want the code for parsing config.sh here and
139 # now so that I can expand $Config{ivsize} and $Config{ivtype}
141 my $fetch_string = <<'EOT';
143 # Search for it in the big string
145 my($self, $key) = @_;
147 my $quote_type = "'";
148 my $marker = "$key=";
150 # Check for the common case, ' delimited
151 my $start = index($Config_SH_expanded, "\n$marker$quote_type");
152 # If that failed, check for " delimited
155 $start = index($Config_SH_expanded, "\n$marker$quote_type");
157 # Start can never be -1 now, as we've rigged the long string we're
158 # searching with an initial dummy newline.
159 return undef if $start == -1;
161 $start += length($marker) + 2;
163 my $value = substr($Config_SH_expanded, $start,
164 index($Config_SH_expanded, "$quote_type\n", $start)
167 # If we had a double-quote, we'd better eval it so escape
168 # sequences and such can be interpolated. Since the incoming
169 # value is supposed to follow shell rules and not perl rules,
170 # we escape any perl variable markers
171 if ($quote_type eq '"') {
172 $value =~ s/\$/\\\$/g;
173 $value =~ s/\@/\\\@/g;
174 eval "\$value = \"$value\"";
177 # So we can say "if $Config{'foo'}".
178 $value = undef if $value eq 'undef';
179 $self->{$key} = $value; # cache it
188 open(CONFIG_SH, 'config.sh') || die "Can't open config.sh: $!";
189 while (<CONFIG_SH>) {
190 next if m:^#!/bin/sh:;
192 # Catch PERL_CONFIG_SH=true and PERL_VERSION=n line from Configure.
193 s/^(\w+)=(true|\d+)\s*$/$1='$2'\n/ or m/^(\w+)='(.*)'$/;
194 my($k, $v) = ($1, $2);
196 # grandfather PATCHLEVEL and SUBVERSION and CONFIG
198 if ($k eq 'PERL_VERSION') {
199 push @v_others, "PATCHLEVEL='$v'\n";
201 elsif ($k eq 'PERL_SUBVERSION') {
202 push @v_others, "SUBVERSION='$v'\n";
204 elsif ($k eq 'PERL_CONFIG_SH') {
205 push @v_others, "CONFIG='$v'\n";
209 # We can delimit things in config.sh with either ' or ".
210 unless ($in_v or m/^(\w+)=(['"])(.*\n)/){
211 push(@non_v, "#$_"); # not a name='value' line
219 ($name,$val) = ($1,$3);
221 $in_v = $val !~ /$quote\n/;
224 s,/,::,g if $Extensions{$name};
226 $val =~ s/$quote\n?\z//;
228 my $line = "$name=$quote$val$quote\n";
229 if (!$Common{$name}){
230 push(@v_others, $line);
233 push(@v_fast, $line);
240 # Calculation for the keys for byteorder
241 # This is somewhat grim, but I need to run fetch_string here.
242 our $Config_SH_expanded = join "\n", '', @v_fast, @v_others;
244 my $t = fetch_string ({}, 'ivtype');
245 my $s = fetch_string ({}, 'ivsize');
247 # byteorder does exist on its own but we overlay a virtual
248 # dynamically recomputed value.
250 # However, ivtype and ivsize will not vary for sane fat binaries
252 my $f = $t eq 'long' ? 'L!' : $s == 8 ? 'Q': 'I';
255 if ($s == 4 || $s == 8) {
256 my $list = join ',', reverse(2..$s);
258 $byteorder_code = <<"EOT";
260 foreach my \$c ($list) { \$i |= ord(\$c); \$i <<= 8 }
262 our \$byteorder = join('', unpack('$format', pack('$f', \$i)));
265 $byteorder_code = "our \$byteorder = '?'x$s;\n";
267 print CONFIG $byteorder_code;
269 print CONFIG_HEAVY @non_v, "\n";
271 # copy config summary format from the myconfig.SH script
272 print CONFIG_HEAVY "our \$summary : unique = <<'!END!';\n";
273 open(MYCONFIG,"<myconfig.SH") || die "open myconfig.SH failed: $!";
274 1 while defined($_ = <MYCONFIG>) && !/^Summary of/;
275 do { print CONFIG_HEAVY $_ } until !defined($_ = <MYCONFIG>) || /^\s*$/;
278 # NB. as $summary is unique, we need to copy it in a lexical variable
279 # before expanding it, because may have been made readonly if a perl
280 # interpreter has been cloned.
282 print CONFIG_HEAVY "\n!END!\n", <<'EOT';
283 my $summary_expanded;
286 return $summary_expanded if $summary_expanded;
287 ($summary_expanded = $summary) =~ s{\$(\w+)}
288 { my $c = $Config::Config{$1}; defined($c) ? $c : 'undef' }ge;
296 print CONFIG_HEAVY join("", @v_fast, sort @v_others);
298 print CONFIG_HEAVY <<'EOT';
300 s/(byteorder=)(['"]).*?\2/$1$2$Config::byteorder$2/m;
301 our $Config_SH : unique = $_;
303 our $Config_SH_expanded : unique = "\n$_" . << 'EOVIRTUAL';
306 foreach my $prefix (qw(ccflags ldflags)) {
307 my $value = fetch_string ({}, $prefix);
308 my $withlargefiles = fetch_string ({}, $prefix . "_uselargefiles");
309 $value =~ s/\Q$withlargefiles\E\b//;
310 print CONFIG_HEAVY "${prefix}_nolargefiles='$value'\n";
313 foreach my $prefix (qw(libs libswanted)) {
314 my $value = fetch_string ({}, $prefix);
316 = split(' ', fetch_string ({}, 'libswanted_uselargefiles'));
319 @lflibswanted{@lflibswanted} = ();
320 if ($prefix eq 'libs') {
321 my @libs = grep { /^-l(.+)/ &&
322 not exists $lflibswanted{$1} }
323 split(' ', fetch_string ({}, 'libs'));
324 $value = join(' ', @libs);
326 my @libswanted = grep { not exists $lflibswanted{$_} }
327 split(' ', fetch_string ({}, 'libswanted'));
328 $value = join(' ', @libswanted);
331 print CONFIG_HEAVY "${prefix}_nolargefiles='$value'\n";
334 print CONFIG_HEAVY "EOVIRTUAL\n";
336 print CONFIG_HEAVY $fetch_string;
338 print CONFIG <<'ENDOFEND';
341 my($self, $key) = @_;
343 # check for cached value (which may be undef so we use exists not defined)
344 return $self->{$key} if exists $self->{$key};
346 return $self->fetch_string($key);
350 print CONFIG_HEAVY <<'ENDOFEND';
355 substr($Config_SH_expanded, 1, index($Config_SH_expanded, '=') - 1 );
359 # Find out how the current key's quoted so we can skip to its end.
360 my $quote = substr($Config_SH_expanded,
361 index($Config_SH_expanded, "=", $prevpos)+1, 1);
362 my $pos = index($Config_SH_expanded, qq($quote\n), $prevpos) + 2;
363 my $len = index($Config_SH_expanded, "=", $pos) - $pos;
365 $len > 0 ? substr($Config_SH_expanded, $pos, $len) : undef;
369 return 1 if exists($_[0]->{$_[1]});
371 return(index($Config_SH_expanded, "\n$_[1]='") != -1 or
372 index($Config_SH_expanded, "\n$_[1]=\"") != -1
376 sub STORE { die "\%Config::Config is read-only\n" }
387 return map { chomp; $_ } grep eval{ /^(?:$re)=/ }, split /^/,
392 # implements -V:cfgvar option (see perlrun -V:)
394 # find optional leading, trailing colons; and query-spec
395 my ($notag,$qry,$lncont) = m/^(:)?(.*?)(:)?$/; # flags fore and aft,
396 # map colon-flags to print decorations
397 my $prfx = $notag ? '': "$qry="; # tag-prefix for print
398 my $lnend = $lncont ? ' ' : ";\n"; # line ending for print
400 # all config-vars are by definition \w only, any \W means regex
402 my @matches = config_re($qry);
403 print map "$_$lnend", @matches ? @matches : "$qry: not found" if !$notag;
404 print map { s/\w+=//; "$_$lnend" } @matches ? @matches : "$qry: not found" if $notag;
406 my $v = (exists $Config::Config{$qry}) ? $Config::Config{$qry}
408 $v = 'undef' unless defined $v;
409 print "${prfx}'${v}'$lnend";
414 # Called by the real AUTOLOAD
417 goto \&$Config::AUTOLOAD;
424 print CONFIG <<'ENDOFSET';
427 my ($value, $v) = $Config_SH_expanded =~ m/^used_aout='(.*)'\s*$/m;
428 for (split ' ', $value) {
429 ($v) = $Config_SH_expanded =~ m/^aout_$_='(.*)'\s*$/m;
430 $preconfig{$_} = $v eq 'undef' ? undef : $v;
433 $preconfig{d_fork} = undef unless $OS2::can_fork; # Some funny cases can't
434 sub TIEHASH { bless {%preconfig} }
436 # Extract the name of the DLL from the makefile to avoid duplication
437 my ($f) = grep -r, qw(GNUMakefile Makefile);
439 if (open my $fh, '<', $f) {
441 $dll = $1, last if /^PERL_DLL_BASE\s*=\s*(\S*)\s*$/;
444 print CONFIG <<ENDOFSET if $dll;
445 \$preconfig{dll_name} = '$dll';
448 print CONFIG <<'ENDOFSET';
455 foreach my $key (keys %Common) {
456 my $value = fetch_string ({}, $key);
457 # Is it safe on the LHS of => ?
458 my $qkey = $key =~ /^[A-Za-z_][A-Za-z0-9_]*$/ ? $key : "'$key'";
459 if (defined $value) {
460 # Quote things for a '' string
461 $value =~ s!\\!\\\\!g;
467 $Common{$key} = "$qkey => $value";
469 my $fast_config = join '', map { " $_,\n" }
470 sort (values %Common, 'byteorder => $byteorder');
472 print CONFIG sprintf <<'ENDOFTIE', $fast_config;
477 require 'Config_heavy.pl';
479 die "&Config::AUTOLOAD failed on $Config::AUTOLOAD";
482 tie %%Config, 'Config', {
489 open(CONFIG_POD, ">lib/Config.pod") or die "Can't open lib/Config.pod: $!";
490 print CONFIG_POD <<'ENDOFTAIL';
493 Config - access Perl configuration information
498 if ($Config{usethreads}) {
499 print "has thread support\n"
502 use Config qw(myconfig config_sh config_vars config_re);
510 config_vars(qw(osname archname));
515 The Config module contains all the information that was available to
516 the C<Configure> program at Perl build time (over 900 values).
518 Shell variables from the F<config.sh> file (written by Configure) are
519 stored in the readonly-variable C<%Config>, indexed by their names.
521 Values stored in config.sh as 'undef' are returned as undefined
522 values. The perl C<exists> function can be used to check if a
523 named variable exists.
529 Returns a textual summary of the major perl configuration values.
530 See also C<-V> in L<perlrun/Switches>.
534 Returns the entire perl configuration information in the form of the
535 original config.sh shell variable assignment script.
537 =item config_re($regex)
539 Like config_sh() but returns, as a list, only the config entries who's
540 names match the $regex.
542 =item config_vars(@names)
544 Prints to STDOUT the values of the named configuration variable. Each is
545 printed on a separate line in the form:
549 Names which are unknown are output as C<name='UNKNOWN';>.
550 See also C<-V:name> in L<perlrun/Switches>.
556 Here's a more sophisticated example of using %Config:
563 unless($Config{sig_name} && $Config{sig_num}) {
566 my @names = split ' ', $Config{sig_name};
567 @sig_num{@names} = split ' ', $Config{sig_num};
569 $sig_name[$sig_num{$_}] ||= $_;
573 print "signal #17 = $sig_name[17]\n";
574 if ($sig_num{ALRM}) {
575 print "SIGALRM is $sig_num{ALRM}\n";
580 Because this information is not stored within the perl executable
581 itself it is possible (but unlikely) that the information does not
582 relate to the actual perl binary which is being used to access it.
584 The Config module is installed into the architecture and version
585 specific library directory ($Config{installarchlib}) and it checks the
586 perl version number when loaded.
588 The values stored in config.sh may be either single-quoted or
589 double-quoted. Double-quoted strings are handy for those cases where you
590 need to include escape sequences in the strings. To avoid runtime variable
591 interpolation, any C<$> and C<@> characters are replaced by C<\$> and
592 C<\@>, respectively. This isn't foolproof, of course, so don't embed C<\$>
593 or C<\@> in double-quoted strings unless you're willing to deal with the
594 consequences. (The slashes will end up escaped and the C<$> or C<@> will
595 trigger variable interpolation)
599 Most C<Config> variables are determined by the C<Configure> script
600 on platforms supported by it (which is most UNIX platforms). Some
601 platforms have custom-made C<Config> variables, and may thus not have
602 some of the variables described below, or may have extraneous variables
603 specific to that particular port. See the port specific documentation
608 if ($Opts{glossary}) {
609 open(GLOS, "<$Glossary") or die "Can't open $Glossary: $!";
616 if (s/\A(\w*)\s+\(([\w.]+)\):\s*\n(\t?)/=item C<$1>\n\nFrom F<$2>:\n\n/m) {
617 my $c = substr $1, 0, 1;
618 unless ($seen{$c}++) {
619 print CONFIG_POD <<EOF if $text;
623 print CONFIG_POD <<EOF;
632 elsif (!$text || !/\A\t/) {
633 warn "Expected a Configure variable header",
634 ($text ? " or another paragraph of description" : () );
636 s/n't/n\00t/g; # leave can't, won't etc untouched
637 s/^\t\s+(.*)/\n$1/gm; # Indented lines ===> new paragraph
638 s/^(?<!\n\n)\t(.*)/$1/gm; # Not indented lines ===> text
639 s{([\'\"])(?=[^\'\"\s]*[./][^\'\"\s]*\1)([^\'\"\s]+)\1}(F<$2>)g; # '.o'
640 s{([\'\"])([^\'\"\s]+)\1}(C<$2>)g; # "date" command
641 s{\'([A-Za-z_\- *=/]+)\'}(C<$1>)g; # 'ln -s'
643 (?<! [\w./<\'\"] ) # Only standalone file names
644 (?! e \. g \. ) # Not e.g.
645 (?! \. \. \. ) # Not ...
647 (?! read/ ) # Not read/write
648 (?! etc\. ) # Not etc.
651 \$ ? # Allow leading $
652 [\w./]* [./] [\w./]* # Require . or / inside
654 (?<! \. (?= [\s)] ) ) # Do not include trailing dot
655 (?! [\w/] ) # Include all of it
657 (F<$1>)xg; # /usr/local
658 s/((?<=\s)~\w*)/F<$1>/g; # ~name
659 s/(?<![.<\'\"])\b([A-Z_]{2,})\b(?![\'\"])/C<$1>/g; # UNISTD
660 s/(?<![.<\'\"])\b(?!the\b)(\w+)\s+macro\b/C<$1> macro/g; # FILE_cnt macro
661 s/n[\0]t/n't/g; # undo can't, won't damage
664 if ($Opts{glossary}) {
665 <GLOS>; # Skip the "DO NOT EDIT"
666 <GLOS>; # Skip the preamble
673 print CONFIG_POD <<'ENDOFTAIL';
679 This module contains a good example of how to use tie to implement a
680 cache and an example of how to make a tied variable readonly to those
692 # Now create Cross.pm if needed
694 open CROSS, ">lib/Cross.pm" or die "Can not open >lib/Cross.pm: $!";
696 # typical invocation:
697 # perl -MCross Makefile.PL
698 # perl -MCross=wince -V:cc
702 my ($package,$platform) = @_;
703 unless (defined $platform) {
704 # if $platform is not specified, then use last one when
705 # 'configpm; was invoked with --cross option
706 $platform = '***replace-marker***';
708 @INC = map {/\blib\b/?(do{local $_=$_;s/\blib\b/xlib\/$platform/;$_},$_):($_)} @INC;
709 $::Cross::platform = $platform;
714 $cross =~ s/\*\*\*replace-marker\*\*\*/$Opts{cross}/g;
719 # Now do some simple tests on the Config.pm file we have created
724 die "$0: $Config_PM not valid"
725 unless $Config{'PERL_CONFIG_SH'} eq 'true';
727 die "$0: error processing $Config_PM"
728 if defined($Config{'an impossible name'})
729 or $Config{'PERL_CONFIG_SH'} ne 'true' # test cache
732 die "$0: error processing $Config_PM"
733 if eval '$Config{"cc"} = 1'
734 or eval 'delete $Config{"cc"}'
739 # Popularity of various entries in %Config, based on a large build and test
740 # run of code in the Fotango build system:
758 inc_version_list: 783
782 installsiteman1dir: 489
783 installsiteman3dir: 489
784 installvendorman1dir: 489
785 installvendorman3dir: 489
794 installprefixexp: 336
797 installvendorarch: 336
798 installvendorbin: 336
799 installvendorlib: 336