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";
298 print CONFIG_HEAVY @non_v, "\n";
300 # copy config summary format from the myconfig.SH script
301 print CONFIG_HEAVY "our \$summary = <<'!END!';\n";
302 open(MYCONFIG,"<myconfig.SH") || die "open myconfig.SH failed: $!";
303 1 while defined($_ = <MYCONFIG>) && !/^Summary of/;
304 do { print CONFIG_HEAVY $_ } until !defined($_ = <MYCONFIG>) || /^\s*$/;
307 print CONFIG_HEAVY "\n!END!\n", <<'EOT';
308 my $summary_expanded;
311 return $summary_expanded if $summary_expanded;
312 ($summary_expanded = $summary) =~ s{\$(\w+)}
313 { my $c = $Config::Config{$1}; defined($c) ? $c : 'undef' }ge;
321 print CONFIG_HEAVY join('', sort @v_others), "!END!\n";
323 # Only need the dynamic byteorder code in Config.pm if 'byteorder' is one of
325 if ($Common{byteorder}) {
326 print CONFIG $byteorder_code;
328 print CONFIG_HEAVY $byteorder_code;
331 print CONFIG_HEAVY <<'EOT';
332 s/(byteorder=)(['"]).*?\2/$1$2$Config::byteorder$2/m;
334 my $config_sh_len = length $_;
336 our $Config_SH_expanded = "\n$_" . << 'EOVIRTUAL';
339 foreach my $prefix (qw(ccflags ldflags)) {
340 my $value = fetch_string ({}, $prefix);
341 my $withlargefiles = fetch_string ({}, $prefix . "_uselargefiles");
342 $value =~ s/\Q$withlargefiles\E\b//;
343 print CONFIG_HEAVY "${prefix}_nolargefiles='$value'\n";
346 foreach my $prefix (qw(libs libswanted)) {
347 my $value = fetch_string ({}, $prefix);
349 = split(' ', fetch_string ({}, 'libswanted_uselargefiles'));
352 @lflibswanted{@lflibswanted} = ();
353 if ($prefix eq 'libs') {
354 my @libs = grep { /^-l(.+)/ &&
355 not exists $lflibswanted{$1} }
356 split(' ', fetch_string ({}, 'libs'));
357 $value = join(' ', @libs);
359 my @libswanted = grep { not exists $lflibswanted{$_} }
360 split(' ', fetch_string ({}, 'libswanted'));
361 $value = join(' ', @libswanted);
364 print CONFIG_HEAVY "${prefix}_nolargefiles='$value'\n";
367 print CONFIG_HEAVY "EOVIRTUAL\n";
369 print CONFIG_HEAVY $fetch_string;
371 print CONFIG <<'ENDOFEND';
374 my($self, $key) = @_;
376 # check for cached value (which may be undef so we use exists not defined)
377 return $self->{$key} if exists $self->{$key};
379 return $self->fetch_string($key);
383 print CONFIG_HEAVY <<'ENDOFEND';
389 substr($Config_SH_expanded, 1, index($Config_SH_expanded, '=') - 1 );
394 if ($seen_quotes{'"'}) {
395 print CONFIG_HEAVY <<'ENDOFEND';
396 # Find out how the current key's quoted so we can skip to its end.
397 my $quote = substr($Config_SH_expanded,
398 index($Config_SH_expanded, "=", $prevpos)+1, 1);
399 my $pos = index($Config_SH_expanded, qq($quote\n), $prevpos) + 2;
402 # Just ' quotes, so it's much easier.
403 print CONFIG_HEAVY <<'ENDOFEND';
404 my $pos = index($Config_SH_expanded, qq('\n), $prevpos) + 2;
407 print CONFIG_HEAVY <<'ENDOFEND';
408 my $len = index($Config_SH_expanded, "=", $pos) - $pos;
410 $len > 0 ? substr($Config_SH_expanded, $pos, $len) : undef;
414 return 1 if exists($_[0]->{$_[1]});
416 return(index($Config_SH_expanded, "\n$_[1]='") != -1
418 if ($seen_quotes{'"'}) {
419 print CONFIG_HEAVY <<'ENDOFEND';
420 or index($Config_SH_expanded, "\n$_[1]=\"") != -1
423 print CONFIG_HEAVY <<'ENDOFEND';
427 sub STORE { die "\%Config::Config is read-only\n" }
433 substr $Config_SH_expanded, 1, $config_sh_len;
438 return map { chomp; $_ } grep eval{ /^(?:$re)=/ }, split /^/,
443 # implements -V:cfgvar option (see perlrun -V:)
445 # find optional leading, trailing colons; and query-spec
446 my ($notag,$qry,$lncont) = m/^(:)?(.*?)(:)?$/; # flags fore and aft,
447 # map colon-flags to print decorations
448 my $prfx = $notag ? '': "$qry="; # tag-prefix for print
449 my $lnend = $lncont ? ' ' : ";\n"; # line ending for print
451 # all config-vars are by definition \w only, any \W means regex
453 my @matches = config_re($qry);
454 print map "$_$lnend", @matches ? @matches : "$qry: not found" if !$notag;
455 print map { s/\w+=//; "$_$lnend" } @matches ? @matches : "$qry: not found" if $notag;
457 my $v = (exists $Config::Config{$qry}) ? $Config::Config{$qry}
459 $v = 'undef' unless defined $v;
460 print "${prfx}'${v}'$lnend";
465 # Called by the real AUTOLOAD
468 goto \&$Config::AUTOLOAD;
475 print CONFIG <<'ENDOFSET';
478 my ($value, $v) = $Config_SH_expanded =~ m/^used_aout='(.*)'\s*$/m;
479 for (split ' ', $value) {
480 ($v) = $Config_SH_expanded =~ m/^aout_$_='(.*)'\s*$/m;
481 $preconfig{$_} = $v eq 'undef' ? undef : $v;
484 $preconfig{d_fork} = undef unless $OS2::can_fork; # Some funny cases can't
485 sub TIEHASH { bless {%preconfig} }
487 # Extract the name of the DLL from the makefile to avoid duplication
488 my ($f) = grep -r, qw(GNUMakefile Makefile);
490 if (open my $fh, '<', $f) {
492 $dll = $1, last if /^PERL_DLL_BASE\s*=\s*(\S*)\s*$/;
495 print CONFIG <<ENDOFSET if $dll;
496 \$preconfig{dll_name} = '$dll';
499 print CONFIG <<'ENDOFSET';
506 foreach my $key (keys %Common) {
507 my $value = fetch_string ({}, $key);
508 # Is it safe on the LHS of => ?
509 my $qkey = $key =~ /^[A-Za-z_][A-Za-z0-9_]*$/ ? $key : "'$key'";
510 if (defined $value) {
511 # Quote things for a '' string
512 $value =~ s!\\!\\\\!g;
518 $Common{$key} = "$qkey => $value";
521 if ($Common{byteorder}) {
522 $Common{byteorder} = 'byteorder => $byteorder';
524 my $fast_config = join '', map { " $_,\n" } sort values %Common;
526 # Sanity check needed to stop an infite loop if Config_heavy.pl fails to define
527 # &launcher for some reason (eg it got truncated)
528 print CONFIG sprintf <<'ENDOFTIE', $fast_config;
533 require 'Config_heavy.pl';
534 goto \&launcher unless $Config::AUTOLOAD =~ /launcher$/;
535 die "&Config::AUTOLOAD failed on $Config::AUTOLOAD";
538 # tie returns the object, so the value returned to require will be true.
539 tie %%Config, 'Config', {
544 open(CONFIG_POD, ">lib/Config.pod") or die "Can't open lib/Config.pod: $!";
545 print CONFIG_POD <<'ENDOFTAIL';
548 Config - access Perl configuration information
553 if ($Config{usethreads}) {
554 print "has thread support\n"
557 use Config qw(myconfig config_sh config_vars config_re);
565 config_vars(qw(osname archname));
570 The Config module contains all the information that was available to
571 the C<Configure> program at Perl build time (over 900 values).
573 Shell variables from the F<config.sh> file (written by Configure) are
574 stored in the readonly-variable C<%Config>, indexed by their names.
576 Values stored in config.sh as 'undef' are returned as undefined
577 values. The perl C<exists> function can be used to check if a
578 named variable exists.
584 Returns a textual summary of the major perl configuration values.
585 See also C<-V> in L<perlrun/Switches>.
589 Returns the entire perl configuration information in the form of the
590 original config.sh shell variable assignment script.
592 =item config_re($regex)
594 Like config_sh() but returns, as a list, only the config entries who's
595 names match the $regex.
597 =item config_vars(@names)
599 Prints to STDOUT the values of the named configuration variable. Each is
600 printed on a separate line in the form:
604 Names which are unknown are output as C<name='UNKNOWN';>.
605 See also C<-V:name> in L<perlrun/Switches>.
611 Here's a more sophisticated example of using %Config:
618 unless($Config{sig_name} && $Config{sig_num}) {
621 my @names = split ' ', $Config{sig_name};
622 @sig_num{@names} = split ' ', $Config{sig_num};
624 $sig_name[$sig_num{$_}] ||= $_;
628 print "signal #17 = $sig_name[17]\n";
629 if ($sig_num{ALRM}) {
630 print "SIGALRM is $sig_num{ALRM}\n";
635 Because this information is not stored within the perl executable
636 itself it is possible (but unlikely) that the information does not
637 relate to the actual perl binary which is being used to access it.
639 The Config module is installed into the architecture and version
640 specific library directory ($Config{installarchlib}) and it checks the
641 perl version number when loaded.
643 The values stored in config.sh may be either single-quoted or
644 double-quoted. Double-quoted strings are handy for those cases where you
645 need to include escape sequences in the strings. To avoid runtime variable
646 interpolation, any C<$> and C<@> characters are replaced by C<\$> and
647 C<\@>, respectively. This isn't foolproof, of course, so don't embed C<\$>
648 or C<\@> in double-quoted strings unless you're willing to deal with the
649 consequences. (The slashes will end up escaped and the C<$> or C<@> will
650 trigger variable interpolation)
654 Most C<Config> variables are determined by the C<Configure> script
655 on platforms supported by it (which is most UNIX platforms). Some
656 platforms have custom-made C<Config> variables, and may thus not have
657 some of the variables described below, or may have extraneous variables
658 specific to that particular port. See the port specific documentation
663 if ($Opts{glossary}) {
664 open(GLOS, "<$Glossary") or die "Can't open $Glossary: $!";
671 if (s/\A(\w*)\s+\(([\w.]+)\):\s*\n(\t?)/=item C<$1>\n\nFrom F<$2>:\n\n/m) {
672 my $c = substr $1, 0, 1;
673 unless ($seen{$c}++) {
674 print CONFIG_POD <<EOF if $text;
678 print CONFIG_POD <<EOF;
687 elsif (!$text || !/\A\t/) {
688 warn "Expected a Configure variable header",
689 ($text ? " or another paragraph of description" : () );
691 s/n't/n\00t/g; # leave can't, won't etc untouched
692 s/^\t\s+(.*)/\n$1/gm; # Indented lines ===> new paragraph
693 s/^(?<!\n\n)\t(.*)/$1/gm; # Not indented lines ===> text
694 s{([\'\"])(?=[^\'\"\s]*[./][^\'\"\s]*\1)([^\'\"\s]+)\1}(F<$2>)g; # '.o'
695 s{([\'\"])([^\'\"\s]+)\1}(C<$2>)g; # "date" command
696 s{\'([A-Za-z_\- *=/]+)\'}(C<$1>)g; # 'ln -s'
698 (?<! [\w./<\'\"] ) # Only standalone file names
699 (?! e \. g \. ) # Not e.g.
700 (?! \. \. \. ) # Not ...
702 (?! read/ ) # Not read/write
703 (?! etc\. ) # Not etc.
706 \$ ? # Allow leading $
707 [\w./]* [./] [\w./]* # Require . or / inside
709 (?<! \. (?= [\s)] ) ) # Do not include trailing dot
710 (?! [\w/] ) # Include all of it
712 (F<$1>)xg; # /usr/local
713 s/((?<=\s)~\w*)/F<$1>/g; # ~name
714 s/(?<![.<\'\"])\b([A-Z_]{2,})\b(?![\'\"])/C<$1>/g; # UNISTD
715 s/(?<![.<\'\"])\b(?!the\b)(\w+)\s+macro\b/C<$1> macro/g; # FILE_cnt macro
716 s/n[\0]t/n't/g; # undo can't, won't damage
719 if ($Opts{glossary}) {
720 <GLOS>; # Skip the "DO NOT EDIT"
721 <GLOS>; # Skip the preamble
728 print CONFIG_POD <<'ENDOFTAIL';
734 This module contains a good example of how to use tie to implement a
735 cache and an example of how to make a tied variable readonly to those
747 # Now create Cross.pm if needed
749 open CROSS, ">lib/Cross.pm" or die "Can not open >lib/Cross.pm: $!";
751 # typical invocation:
752 # perl -MCross Makefile.PL
753 # perl -MCross=wince -V:cc
757 my ($package,$platform) = @_;
758 unless (defined $platform) {
759 # if $platform is not specified, then use last one when
760 # 'configpm; was invoked with --cross option
761 $platform = '***replace-marker***';
763 @INC = map {/\blib\b/?(do{local $_=$_;s/\blib\b/xlib\/$platform/;$_},$_):($_)} @INC;
764 $::Cross::platform = $platform;
769 $cross =~ s/\*\*\*replace-marker\*\*\*/$Opts{cross}/g;
774 # Now do some simple tests on the Config.pm file we have created
777 require $Config_heavy;
780 die "$0: $Config_PM not valid"
781 unless $Config{'PERL_CONFIG_SH'} eq 'true';
783 die "$0: error processing $Config_PM"
784 if defined($Config{'an impossible name'})
785 or $Config{'PERL_CONFIG_SH'} ne 'true' # test cache
788 die "$0: error processing $Config_PM"
789 if eval '$Config{"cc"} = 1'
790 or eval 'delete $Config{"cc"}'
795 # Popularity of various entries in %Config, based on a large build and test
796 # run of code in the Fotango build system:
814 inc_version_list: 783
838 installsiteman1dir: 489
839 installsiteman3dir: 489
840 installvendorman1dir: 489
841 installvendorman3dir: 489
850 installprefixexp: 336
853 installvendorarch: 336
854 installvendorbin: 336
855 installvendorlib: 336