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) . ")";
145 # This is somewhat grim, but I want the code for parsing config.sh here and
146 # now so that I can expand $Config{ivsize} and $Config{ivtype}
148 my $fetch_string = <<'EOT';
150 # Search for it in the big string
152 my($self, $key) = @_;
154 my $quote_type = "'";
155 my $marker = "$key=";
157 # Check for the common case, ' delimited
158 my $start = index($Config_SH_expanded, "\n$marker$quote_type");
159 # If that failed, check for " delimited
162 $start = index($Config_SH_expanded, "\n$marker$quote_type");
164 # Start can never be -1 now, as we've rigged the long string we're
165 # searching with an initial dummy newline.
166 return undef if $start == -1;
168 $start += length($marker) + 2;
170 my $value = substr($Config_SH_expanded, $start,
171 index($Config_SH_expanded, "$quote_type\n", $start)
174 # If we had a double-quote, we'd better eval it so escape
175 # sequences and such can be interpolated. Since the incoming
176 # value is supposed to follow shell rules and not perl rules,
177 # we escape any perl variable markers
178 if ($quote_type eq '"') {
179 $value =~ s/\$/\\\$/g;
180 $value =~ s/\@/\\\@/g;
181 eval "\$value = \"$value\"";
184 # So we can say "if $Config{'foo'}".
185 $value = undef if $value eq 'undef';
186 $self->{$key} = $value; # cache it
195 open(CONFIG_SH, 'config.sh') || die "Can't open config.sh: $!";
196 while (<CONFIG_SH>) {
197 next if m:^#!/bin/sh:;
199 # Catch PERL_CONFIG_SH=true and PERL_VERSION=n line from Configure.
200 s/^(\w+)=(true|\d+)\s*$/$1='$2'\n/ or m/^(\w+)='(.*)'$/;
201 my($k, $v) = ($1, $2);
203 # grandfather PATCHLEVEL and SUBVERSION and CONFIG
205 if ($k eq 'PERL_VERSION') {
206 push @v_others, "PATCHLEVEL='$v'\n";
208 elsif ($k eq 'PERL_SUBVERSION') {
209 push @v_others, "SUBVERSION='$v'\n";
211 elsif ($k eq 'PERL_CONFIG_SH') {
212 push @v_others, "CONFIG='$v'\n";
216 # We can delimit things in config.sh with either ' or ".
217 unless ($in_v or m/^(\w+)=(['"])(.*\n)/){
218 push(@non_v, "#$_"); # not a name='value' line
226 ($name,$val) = ($1,$3);
228 $in_v = $val !~ /$quote\n/;
231 s,/,::,g if $Extensions{$name};
233 $val =~ s/$quote\n?\z//;
235 my $line = "$name=$quote$val$quote\n";
236 push(@v_others, $line);
242 # Calculation for the keys for byteorder
243 # This is somewhat grim, but I need to run fetch_string here.
244 our $Config_SH_expanded = join "\n", '', @v_others;
246 my $t = fetch_string ({}, 'ivtype');
247 my $s = fetch_string ({}, 'ivsize');
249 # byteorder does exist on its own but we overlay a virtual
250 # dynamically recomputed value.
252 # However, ivtype and ivsize will not vary for sane fat binaries
254 my $f = $t eq 'long' ? 'L!' : $s == 8 ? 'Q': 'I';
257 if ($s == 4 || $s == 8) {
258 my $list = join ',', reverse(2..$s);
260 $byteorder_code = <<"EOT";
263 foreach my \$c ($list) { \$i |= ord(\$c); \$i <<= 8 }
265 our \$byteorder = join('', unpack('$format', pack('$f', \$i)));
268 $byteorder_code = "our \$byteorder = '?'x$s;\n";
271 print CONFIG_HEAVY @non_v, "\n";
273 # copy config summary format from the myconfig.SH script
274 print CONFIG_HEAVY "our \$summary : unique = <<'!END!';\n";
275 open(MYCONFIG,"<myconfig.SH") || die "open myconfig.SH failed: $!";
276 1 while defined($_ = <MYCONFIG>) && !/^Summary of/;
277 do { print CONFIG_HEAVY $_ } until !defined($_ = <MYCONFIG>) || /^\s*$/;
280 # NB. as $summary is unique, we need to copy it in a lexical variable
281 # before expanding it, because may have been made readonly if a perl
282 # interpreter has been cloned.
284 print CONFIG_HEAVY "\n!END!\n", <<'EOT';
285 my $summary_expanded;
288 return $summary_expanded if $summary_expanded;
289 ($summary_expanded = $summary) =~ s{\$(\w+)}
290 { my $c = $Config::Config{$1}; defined($c) ? $c : 'undef' }ge;
298 print CONFIG_HEAVY join('', sort @v_others), "!END!\n";
300 # Only need the dynamic byteorder code in Config.pm if 'byteorder' is one of
302 if ($Common{byteorder}) {
303 print CONFIG $byteorder_code;
305 print CONFIG_HEAVY $byteorder_code;
308 print CONFIG_HEAVY <<'EOT';
309 s/(byteorder=)(['"]).*?\2/$1$2$Config::byteorder$2/m;
311 my $config_sh_len = length $_;
313 our $Config_SH_expanded : unique = "\n$_" . << 'EOVIRTUAL';
316 foreach my $prefix (qw(ccflags ldflags)) {
317 my $value = fetch_string ({}, $prefix);
318 my $withlargefiles = fetch_string ({}, $prefix . "_uselargefiles");
319 $value =~ s/\Q$withlargefiles\E\b//;
320 print CONFIG_HEAVY "${prefix}_nolargefiles='$value'\n";
323 foreach my $prefix (qw(libs libswanted)) {
324 my $value = fetch_string ({}, $prefix);
326 = split(' ', fetch_string ({}, 'libswanted_uselargefiles'));
329 @lflibswanted{@lflibswanted} = ();
330 if ($prefix eq 'libs') {
331 my @libs = grep { /^-l(.+)/ &&
332 not exists $lflibswanted{$1} }
333 split(' ', fetch_string ({}, 'libs'));
334 $value = join(' ', @libs);
336 my @libswanted = grep { not exists $lflibswanted{$_} }
337 split(' ', fetch_string ({}, 'libswanted'));
338 $value = join(' ', @libswanted);
341 print CONFIG_HEAVY "${prefix}_nolargefiles='$value'\n";
344 print CONFIG_HEAVY "EOVIRTUAL\n";
346 print CONFIG_HEAVY $fetch_string;
348 print CONFIG <<'ENDOFEND';
351 my($self, $key) = @_;
353 # check for cached value (which may be undef so we use exists not defined)
354 return $self->{$key} if exists $self->{$key};
356 return $self->fetch_string($key);
360 print CONFIG_HEAVY <<'ENDOFEND';
365 substr($Config_SH_expanded, 1, index($Config_SH_expanded, '=') - 1 );
369 # Find out how the current key's quoted so we can skip to its end.
370 my $quote = substr($Config_SH_expanded,
371 index($Config_SH_expanded, "=", $prevpos)+1, 1);
372 my $pos = index($Config_SH_expanded, qq($quote\n), $prevpos) + 2;
373 my $len = index($Config_SH_expanded, "=", $pos) - $pos;
375 $len > 0 ? substr($Config_SH_expanded, $pos, $len) : undef;
379 return 1 if exists($_[0]->{$_[1]});
381 return(index($Config_SH_expanded, "\n$_[1]='") != -1 or
382 index($Config_SH_expanded, "\n$_[1]=\"") != -1
386 sub STORE { die "\%Config::Config is read-only\n" }
392 substr $Config_SH_expanded, 1, $config_sh_len;
397 return map { chomp; $_ } grep eval{ /^(?:$re)=/ }, split /^/,
402 # implements -V:cfgvar option (see perlrun -V:)
404 # find optional leading, trailing colons; and query-spec
405 my ($notag,$qry,$lncont) = m/^(:)?(.*?)(:)?$/; # flags fore and aft,
406 # map colon-flags to print decorations
407 my $prfx = $notag ? '': "$qry="; # tag-prefix for print
408 my $lnend = $lncont ? ' ' : ";\n"; # line ending for print
410 # all config-vars are by definition \w only, any \W means regex
412 my @matches = config_re($qry);
413 print map "$_$lnend", @matches ? @matches : "$qry: not found" if !$notag;
414 print map { s/\w+=//; "$_$lnend" } @matches ? @matches : "$qry: not found" if $notag;
416 my $v = (exists $Config::Config{$qry}) ? $Config::Config{$qry}
418 $v = 'undef' unless defined $v;
419 print "${prfx}'${v}'$lnend";
424 # Called by the real AUTOLOAD
427 goto \&$Config::AUTOLOAD;
434 print CONFIG <<'ENDOFSET';
437 my ($value, $v) = $Config_SH_expanded =~ m/^used_aout='(.*)'\s*$/m;
438 for (split ' ', $value) {
439 ($v) = $Config_SH_expanded =~ m/^aout_$_='(.*)'\s*$/m;
440 $preconfig{$_} = $v eq 'undef' ? undef : $v;
443 $preconfig{d_fork} = undef unless $OS2::can_fork; # Some funny cases can't
444 sub TIEHASH { bless {%preconfig} }
446 # Extract the name of the DLL from the makefile to avoid duplication
447 my ($f) = grep -r, qw(GNUMakefile Makefile);
449 if (open my $fh, '<', $f) {
451 $dll = $1, last if /^PERL_DLL_BASE\s*=\s*(\S*)\s*$/;
454 print CONFIG <<ENDOFSET if $dll;
455 \$preconfig{dll_name} = '$dll';
458 print CONFIG <<'ENDOFSET';
465 foreach my $key (keys %Common) {
466 my $value = fetch_string ({}, $key);
467 # Is it safe on the LHS of => ?
468 my $qkey = $key =~ /^[A-Za-z_][A-Za-z0-9_]*$/ ? $key : "'$key'";
469 if (defined $value) {
470 # Quote things for a '' string
471 $value =~ s!\\!\\\\!g;
477 $Common{$key} = "$qkey => $value";
480 if ($Common{byteorder}) {
481 $Common{byteorder} = 'byteorder => $byteorder';
483 my $fast_config = join '', map { " $_,\n" } sort values %Common;
485 print CONFIG sprintf <<'ENDOFTIE', $fast_config;
490 require 'Config_heavy.pl';
492 die "&Config::AUTOLOAD failed on $Config::AUTOLOAD";
495 tie %%Config, 'Config', {
502 open(CONFIG_POD, ">lib/Config.pod") or die "Can't open lib/Config.pod: $!";
503 print CONFIG_POD <<'ENDOFTAIL';
506 Config - access Perl configuration information
511 if ($Config{usethreads}) {
512 print "has thread support\n"
515 use Config qw(myconfig config_sh config_vars config_re);
523 config_vars(qw(osname archname));
528 The Config module contains all the information that was available to
529 the C<Configure> program at Perl build time (over 900 values).
531 Shell variables from the F<config.sh> file (written by Configure) are
532 stored in the readonly-variable C<%Config>, indexed by their names.
534 Values stored in config.sh as 'undef' are returned as undefined
535 values. The perl C<exists> function can be used to check if a
536 named variable exists.
542 Returns a textual summary of the major perl configuration values.
543 See also C<-V> in L<perlrun/Switches>.
547 Returns the entire perl configuration information in the form of the
548 original config.sh shell variable assignment script.
550 =item config_re($regex)
552 Like config_sh() but returns, as a list, only the config entries who's
553 names match the $regex.
555 =item config_vars(@names)
557 Prints to STDOUT the values of the named configuration variable. Each is
558 printed on a separate line in the form:
562 Names which are unknown are output as C<name='UNKNOWN';>.
563 See also C<-V:name> in L<perlrun/Switches>.
569 Here's a more sophisticated example of using %Config:
576 unless($Config{sig_name} && $Config{sig_num}) {
579 my @names = split ' ', $Config{sig_name};
580 @sig_num{@names} = split ' ', $Config{sig_num};
582 $sig_name[$sig_num{$_}] ||= $_;
586 print "signal #17 = $sig_name[17]\n";
587 if ($sig_num{ALRM}) {
588 print "SIGALRM is $sig_num{ALRM}\n";
593 Because this information is not stored within the perl executable
594 itself it is possible (but unlikely) that the information does not
595 relate to the actual perl binary which is being used to access it.
597 The Config module is installed into the architecture and version
598 specific library directory ($Config{installarchlib}) and it checks the
599 perl version number when loaded.
601 The values stored in config.sh may be either single-quoted or
602 double-quoted. Double-quoted strings are handy for those cases where you
603 need to include escape sequences in the strings. To avoid runtime variable
604 interpolation, any C<$> and C<@> characters are replaced by C<\$> and
605 C<\@>, respectively. This isn't foolproof, of course, so don't embed C<\$>
606 or C<\@> in double-quoted strings unless you're willing to deal with the
607 consequences. (The slashes will end up escaped and the C<$> or C<@> will
608 trigger variable interpolation)
612 Most C<Config> variables are determined by the C<Configure> script
613 on platforms supported by it (which is most UNIX platforms). Some
614 platforms have custom-made C<Config> variables, and may thus not have
615 some of the variables described below, or may have extraneous variables
616 specific to that particular port. See the port specific documentation
621 if ($Opts{glossary}) {
622 open(GLOS, "<$Glossary") or die "Can't open $Glossary: $!";
629 if (s/\A(\w*)\s+\(([\w.]+)\):\s*\n(\t?)/=item C<$1>\n\nFrom F<$2>:\n\n/m) {
630 my $c = substr $1, 0, 1;
631 unless ($seen{$c}++) {
632 print CONFIG_POD <<EOF if $text;
636 print CONFIG_POD <<EOF;
645 elsif (!$text || !/\A\t/) {
646 warn "Expected a Configure variable header",
647 ($text ? " or another paragraph of description" : () );
649 s/n't/n\00t/g; # leave can't, won't etc untouched
650 s/^\t\s+(.*)/\n$1/gm; # Indented lines ===> new paragraph
651 s/^(?<!\n\n)\t(.*)/$1/gm; # Not indented lines ===> text
652 s{([\'\"])(?=[^\'\"\s]*[./][^\'\"\s]*\1)([^\'\"\s]+)\1}(F<$2>)g; # '.o'
653 s{([\'\"])([^\'\"\s]+)\1}(C<$2>)g; # "date" command
654 s{\'([A-Za-z_\- *=/]+)\'}(C<$1>)g; # 'ln -s'
656 (?<! [\w./<\'\"] ) # Only standalone file names
657 (?! e \. g \. ) # Not e.g.
658 (?! \. \. \. ) # Not ...
660 (?! read/ ) # Not read/write
661 (?! etc\. ) # Not etc.
664 \$ ? # Allow leading $
665 [\w./]* [./] [\w./]* # Require . or / inside
667 (?<! \. (?= [\s)] ) ) # Do not include trailing dot
668 (?! [\w/] ) # Include all of it
670 (F<$1>)xg; # /usr/local
671 s/((?<=\s)~\w*)/F<$1>/g; # ~name
672 s/(?<![.<\'\"])\b([A-Z_]{2,})\b(?![\'\"])/C<$1>/g; # UNISTD
673 s/(?<![.<\'\"])\b(?!the\b)(\w+)\s+macro\b/C<$1> macro/g; # FILE_cnt macro
674 s/n[\0]t/n't/g; # undo can't, won't damage
677 if ($Opts{glossary}) {
678 <GLOS>; # Skip the "DO NOT EDIT"
679 <GLOS>; # Skip the preamble
686 print CONFIG_POD <<'ENDOFTAIL';
692 This module contains a good example of how to use tie to implement a
693 cache and an example of how to make a tied variable readonly to those
705 # Now create Cross.pm if needed
707 open CROSS, ">lib/Cross.pm" or die "Can not open >lib/Cross.pm: $!";
709 # typical invocation:
710 # perl -MCross Makefile.PL
711 # perl -MCross=wince -V:cc
715 my ($package,$platform) = @_;
716 unless (defined $platform) {
717 # if $platform is not specified, then use last one when
718 # 'configpm; was invoked with --cross option
719 $platform = '***replace-marker***';
721 @INC = map {/\blib\b/?(do{local $_=$_;s/\blib\b/xlib\/$platform/;$_},$_):($_)} @INC;
722 $::Cross::platform = $platform;
727 $cross =~ s/\*\*\*replace-marker\*\*\*/$Opts{cross}/g;
732 # Now do some simple tests on the Config.pm file we have created
737 die "$0: $Config_PM not valid"
738 unless $Config{'PERL_CONFIG_SH'} eq 'true';
740 die "$0: error processing $Config_PM"
741 if defined($Config{'an impossible name'})
742 or $Config{'PERL_CONFIG_SH'} ne 'true' # test cache
745 die "$0: error processing $Config_PM"
746 if eval '$Config{"cc"} = 1'
747 or eval 'delete $Config{"cc"}'
752 # Popularity of various entries in %Config, based on a large build and test
753 # run of code in the Fotango build system:
771 inc_version_list: 783
795 installsiteman1dir: 489
796 installsiteman3dir: 489
797 installvendorman1dir: 489
798 installvendorman3dir: 489
807 installprefixexp: 336
810 installvendorarch: 336
811 installvendorbin: 336
812 installvendorlib: 336