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 $byteorder_code = <<"EOT";
269 foreach my \$c ($list) { \$i |= ord(\$c); \$i <<= 8 }
271 our \$byteorder = join('', unpack('$format', pack('$f', \$i)));
274 $byteorder_code = "our \$byteorder = '?'x$s;\n";
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) ? $c : 'undef' }ge;
304 print CONFIG_HEAVY join('', @v_fast, sort @v_others), "!END!\n";
306 # Only need the dynamic byteorder code in Config.pm if 'byteorder' is one of
308 if ($Common{byteorder}) {
309 print CONFIG $byteorder_code;
311 print CONFIG_HEAVY $byteorder_code;
314 print CONFIG_HEAVY <<'EOT';
315 s/(byteorder=)(['"]).*?\2/$1$2$Config::byteorder$2/m;
317 my $config_sh_len = length $_;
319 our $Config_SH_expanded : unique = "\n$_" . << 'EOVIRTUAL';
322 foreach my $prefix (qw(ccflags ldflags)) {
323 my $value = fetch_string ({}, $prefix);
324 my $withlargefiles = fetch_string ({}, $prefix . "_uselargefiles");
325 $value =~ s/\Q$withlargefiles\E\b//;
326 print CONFIG_HEAVY "${prefix}_nolargefiles='$value'\n";
329 foreach my $prefix (qw(libs libswanted)) {
330 my $value = fetch_string ({}, $prefix);
332 = split(' ', fetch_string ({}, 'libswanted_uselargefiles'));
335 @lflibswanted{@lflibswanted} = ();
336 if ($prefix eq 'libs') {
337 my @libs = grep { /^-l(.+)/ &&
338 not exists $lflibswanted{$1} }
339 split(' ', fetch_string ({}, 'libs'));
340 $value = join(' ', @libs);
342 my @libswanted = grep { not exists $lflibswanted{$_} }
343 split(' ', fetch_string ({}, 'libswanted'));
344 $value = join(' ', @libswanted);
347 print CONFIG_HEAVY "${prefix}_nolargefiles='$value'\n";
350 print CONFIG_HEAVY "EOVIRTUAL\n";
352 print CONFIG_HEAVY $fetch_string;
354 print CONFIG <<'ENDOFEND';
357 my($self, $key) = @_;
359 # check for cached value (which may be undef so we use exists not defined)
360 return $self->{$key} if exists $self->{$key};
362 return $self->fetch_string($key);
366 print CONFIG_HEAVY <<'ENDOFEND';
371 substr($Config_SH_expanded, 1, index($Config_SH_expanded, '=') - 1 );
375 # Find out how the current key's quoted so we can skip to its end.
376 my $quote = substr($Config_SH_expanded,
377 index($Config_SH_expanded, "=", $prevpos)+1, 1);
378 my $pos = index($Config_SH_expanded, qq($quote\n), $prevpos) + 2;
379 my $len = index($Config_SH_expanded, "=", $pos) - $pos;
381 $len > 0 ? substr($Config_SH_expanded, $pos, $len) : undef;
385 return 1 if exists($_[0]->{$_[1]});
387 return(index($Config_SH_expanded, "\n$_[1]='") != -1 or
388 index($Config_SH_expanded, "\n$_[1]=\"") != -1
392 sub STORE { die "\%Config::Config is read-only\n" }
398 substr $Config_SH_expanded, 1, $config_sh_len;
403 return map { chomp; $_ } grep eval{ /^(?:$re)=/ }, split /^/,
408 # implements -V:cfgvar option (see perlrun -V:)
410 # find optional leading, trailing colons; and query-spec
411 my ($notag,$qry,$lncont) = m/^(:)?(.*?)(:)?$/; # flags fore and aft,
412 # map colon-flags to print decorations
413 my $prfx = $notag ? '': "$qry="; # tag-prefix for print
414 my $lnend = $lncont ? ' ' : ";\n"; # line ending for print
416 # all config-vars are by definition \w only, any \W means regex
418 my @matches = config_re($qry);
419 print map "$_$lnend", @matches ? @matches : "$qry: not found" if !$notag;
420 print map { s/\w+=//; "$_$lnend" } @matches ? @matches : "$qry: not found" if $notag;
422 my $v = (exists $Config::Config{$qry}) ? $Config::Config{$qry}
424 $v = 'undef' unless defined $v;
425 print "${prfx}'${v}'$lnend";
430 # Called by the real AUTOLOAD
433 goto \&$Config::AUTOLOAD;
440 print CONFIG <<'ENDOFSET';
443 my ($value, $v) = $Config_SH_expanded =~ m/^used_aout='(.*)'\s*$/m;
444 for (split ' ', $value) {
445 ($v) = $Config_SH_expanded =~ m/^aout_$_='(.*)'\s*$/m;
446 $preconfig{$_} = $v eq 'undef' ? undef : $v;
449 $preconfig{d_fork} = undef unless $OS2::can_fork; # Some funny cases can't
450 sub TIEHASH { bless {%preconfig} }
452 # Extract the name of the DLL from the makefile to avoid duplication
453 my ($f) = grep -r, qw(GNUMakefile Makefile);
455 if (open my $fh, '<', $f) {
457 $dll = $1, last if /^PERL_DLL_BASE\s*=\s*(\S*)\s*$/;
460 print CONFIG <<ENDOFSET if $dll;
461 \$preconfig{dll_name} = '$dll';
464 print CONFIG <<'ENDOFSET';
471 foreach my $key (keys %Common) {
472 my $value = fetch_string ({}, $key);
473 # Is it safe on the LHS of => ?
474 my $qkey = $key =~ /^[A-Za-z_][A-Za-z0-9_]*$/ ? $key : "'$key'";
475 if (defined $value) {
476 # Quote things for a '' string
477 $value =~ s!\\!\\\\!g;
483 $Common{$key} = "$qkey => $value";
486 if ($Common{byteorder}) {
487 $Common{byteorder} = 'byteorder => $byteorder';
489 my $fast_config = join '', map { " $_,\n" } sort values %Common;
491 print CONFIG sprintf <<'ENDOFTIE', $fast_config;
496 require 'Config_heavy.pl';
498 die "&Config::AUTOLOAD failed on $Config::AUTOLOAD";
501 tie %%Config, 'Config', {
508 open(CONFIG_POD, ">lib/Config.pod") or die "Can't open lib/Config.pod: $!";
509 print CONFIG_POD <<'ENDOFTAIL';
512 Config - access Perl configuration information
517 if ($Config{usethreads}) {
518 print "has thread support\n"
521 use Config qw(myconfig config_sh config_vars config_re);
529 config_vars(qw(osname archname));
534 The Config module contains all the information that was available to
535 the C<Configure> program at Perl build time (over 900 values).
537 Shell variables from the F<config.sh> file (written by Configure) are
538 stored in the readonly-variable C<%Config>, indexed by their names.
540 Values stored in config.sh as 'undef' are returned as undefined
541 values. The perl C<exists> function can be used to check if a
542 named variable exists.
548 Returns a textual summary of the major perl configuration values.
549 See also C<-V> in L<perlrun/Switches>.
553 Returns the entire perl configuration information in the form of the
554 original config.sh shell variable assignment script.
556 =item config_re($regex)
558 Like config_sh() but returns, as a list, only the config entries who's
559 names match the $regex.
561 =item config_vars(@names)
563 Prints to STDOUT the values of the named configuration variable. Each is
564 printed on a separate line in the form:
568 Names which are unknown are output as C<name='UNKNOWN';>.
569 See also C<-V:name> in L<perlrun/Switches>.
575 Here's a more sophisticated example of using %Config:
582 unless($Config{sig_name} && $Config{sig_num}) {
585 my @names = split ' ', $Config{sig_name};
586 @sig_num{@names} = split ' ', $Config{sig_num};
588 $sig_name[$sig_num{$_}] ||= $_;
592 print "signal #17 = $sig_name[17]\n";
593 if ($sig_num{ALRM}) {
594 print "SIGALRM is $sig_num{ALRM}\n";
599 Because this information is not stored within the perl executable
600 itself it is possible (but unlikely) that the information does not
601 relate to the actual perl binary which is being used to access it.
603 The Config module is installed into the architecture and version
604 specific library directory ($Config{installarchlib}) and it checks the
605 perl version number when loaded.
607 The values stored in config.sh may be either single-quoted or
608 double-quoted. Double-quoted strings are handy for those cases where you
609 need to include escape sequences in the strings. To avoid runtime variable
610 interpolation, any C<$> and C<@> characters are replaced by C<\$> and
611 C<\@>, respectively. This isn't foolproof, of course, so don't embed C<\$>
612 or C<\@> in double-quoted strings unless you're willing to deal with the
613 consequences. (The slashes will end up escaped and the C<$> or C<@> will
614 trigger variable interpolation)
618 Most C<Config> variables are determined by the C<Configure> script
619 on platforms supported by it (which is most UNIX platforms). Some
620 platforms have custom-made C<Config> variables, and may thus not have
621 some of the variables described below, or may have extraneous variables
622 specific to that particular port. See the port specific documentation
627 if ($Opts{glossary}) {
628 open(GLOS, "<$Glossary") or die "Can't open $Glossary: $!";
635 if (s/\A(\w*)\s+\(([\w.]+)\):\s*\n(\t?)/=item C<$1>\n\nFrom F<$2>:\n\n/m) {
636 my $c = substr $1, 0, 1;
637 unless ($seen{$c}++) {
638 print CONFIG_POD <<EOF if $text;
642 print CONFIG_POD <<EOF;
651 elsif (!$text || !/\A\t/) {
652 warn "Expected a Configure variable header",
653 ($text ? " or another paragraph of description" : () );
655 s/n't/n\00t/g; # leave can't, won't etc untouched
656 s/^\t\s+(.*)/\n$1/gm; # Indented lines ===> new paragraph
657 s/^(?<!\n\n)\t(.*)/$1/gm; # Not indented lines ===> text
658 s{([\'\"])(?=[^\'\"\s]*[./][^\'\"\s]*\1)([^\'\"\s]+)\1}(F<$2>)g; # '.o'
659 s{([\'\"])([^\'\"\s]+)\1}(C<$2>)g; # "date" command
660 s{\'([A-Za-z_\- *=/]+)\'}(C<$1>)g; # 'ln -s'
662 (?<! [\w./<\'\"] ) # Only standalone file names
663 (?! e \. g \. ) # Not e.g.
664 (?! \. \. \. ) # Not ...
666 (?! read/ ) # Not read/write
667 (?! etc\. ) # Not etc.
670 \$ ? # Allow leading $
671 [\w./]* [./] [\w./]* # Require . or / inside
673 (?<! \. (?= [\s)] ) ) # Do not include trailing dot
674 (?! [\w/] ) # Include all of it
676 (F<$1>)xg; # /usr/local
677 s/((?<=\s)~\w*)/F<$1>/g; # ~name
678 s/(?<![.<\'\"])\b([A-Z_]{2,})\b(?![\'\"])/C<$1>/g; # UNISTD
679 s/(?<![.<\'\"])\b(?!the\b)(\w+)\s+macro\b/C<$1> macro/g; # FILE_cnt macro
680 s/n[\0]t/n't/g; # undo can't, won't damage
683 if ($Opts{glossary}) {
684 <GLOS>; # Skip the "DO NOT EDIT"
685 <GLOS>; # Skip the preamble
692 print CONFIG_POD <<'ENDOFTAIL';
698 This module contains a good example of how to use tie to implement a
699 cache and an example of how to make a tied variable readonly to those
711 # Now create Cross.pm if needed
713 open CROSS, ">lib/Cross.pm" or die "Can not open >lib/Cross.pm: $!";
715 # typical invocation:
716 # perl -MCross Makefile.PL
717 # perl -MCross=wince -V:cc
721 my ($package,$platform) = @_;
722 unless (defined $platform) {
723 # if $platform is not specified, then use last one when
724 # 'configpm; was invoked with --cross option
725 $platform = '***replace-marker***';
727 @INC = map {/\blib\b/?(do{local $_=$_;s/\blib\b/xlib\/$platform/;$_},$_):($_)} @INC;
728 $::Cross::platform = $platform;
733 $cross =~ s/\*\*\*replace-marker\*\*\*/$Opts{cross}/g;
738 # Now do some simple tests on the Config.pm file we have created
743 die "$0: $Config_PM not valid"
744 unless $Config{'PERL_CONFIG_SH'} eq 'true';
746 die "$0: error processing $Config_PM"
747 if defined($Config{'an impossible name'})
748 or $Config{'PERL_CONFIG_SH'} ne 'true' # test cache
751 die "$0: error processing $Config_PM"
752 if eval '$Config{"cc"} = 1'
753 or eval 'delete $Config{"cc"}'
758 # Popularity of various entries in %Config, based on a large build and test
759 # run of code in the Fotango build system:
777 inc_version_list: 783
801 installsiteman1dir: 489
802 installsiteman3dir: 489
803 installvendorman1dir: 489
804 installvendorman3dir: 489
813 installprefixexp: 336
816 installvendorarch: 336
817 installvendorbin: 336
818 installvendorlib: 336