3 # commonly used names to put first (and hence lookup fastest)
4 my %Common = map {($_,$_)}
5 qw(archname osname osvers prefix libs libpth
6 dynamic_ext static_ext dlsrc so
8 privlibexp archlibexp installprivlib installarchlib
9 sharpbang startsh shsharp
12 # names of things which may need to have slashes changed to double-colons
13 my %Extensions = map {($_,$_)}
14 qw(dynamic_ext static_ext extensions known_extensions);
16 # allowed opts as well as specifies default and initial values
18 'cross' => '', # --cross=PALTFORM - crosscompiling for PLATFORM
19 'glossary' => 1, # --no-glossary - no glossary file inclusion,
24 # user specified options
27 (map {/^--([\-_\w]+)=(.*)$/} @ARGV),
28 # --opt --no-opt --noopt
29 (map {/^no-?(.*)$/i?($1=>0):($_=>1)} map {/^--([\-_\w]+)$/} @ARGV),
32 my %opts = (%Allowed_Opts, %given_opts);
34 for my $opt (grep {!exists $Allowed_Opts{$_}} keys %given_opts) {
35 die "option '$opt' is not recognized";
37 @ARGV = grep {!/^--/} @ARGV;
46 my $Glossary = $ARGV[1] || 'Porting/Glossary';
49 # creating cross-platform config file
51 mkdir "xlib/$Opts{cross}";
52 $Config_PM = $ARGV[0] || "xlib/$Opts{cross}/Config.pm";
55 $Config_PM = $ARGV[0] || 'lib/Config.pm';
59 open CONFIG, ">$Config_PM" or die "Can't open $Config_PM: $!\n";
61 my $myver = sprintf "v%vd", $^V;
63 printf CONFIG <<'ENDOFBEG', ($myver) x 3;
64 # This file was created by configpm when Perl was built. Any changes
65 # made to this file will be lost the next time perl is built.
68 @EXPORT = qw(%%Config);
69 @EXPORT_OK = qw(myconfig config_sh config_vars config_re);
71 my %%Export_Cache = map {($_ => 1)} (@EXPORT, @EXPORT_OK);
73 # Define our own import method to avoid pulling in the full Exporter:
76 @_ = @EXPORT unless @_;
78 my @funcs = grep $_ ne '%%Config', @_;
79 my $export_Config = @funcs < @_ ? 1 : 0;
81 my $callpkg = caller(0);
82 foreach my $func (@funcs) {
83 die sprintf qq{"%%s" is not exported by the %%s module\n},
84 $func, __PACKAGE__ unless $Export_Cache{$func};
85 *{$callpkg.'::'.$func} = \&{$func};
88 *{"$callpkg\::Config"} = \%%Config if $export_Config;
92 die "Perl lib version (%s) doesn't match executable version ($])"
96 or die "Perl lib version (%s) doesn't match executable version (" .
97 sprintf("v%%vd",$^V) . ")";
109 # This is somewhat grim, but I want the code for parsing config.sh here and
110 # now so that I can expand $Config{ivsize} and $Config{ivtype}
112 my $fetch_string = <<'EOT';
114 # Search for it in the big string
116 my($self, $key) = @_;
118 my $quote_type = "'";
119 my $marker = "$key=";
121 # Check for the common case, ' delimited
122 my $start = index($Config_SH_expanded, "\n$marker$quote_type");
123 # If that failed, check for " delimited
126 $start = index($Config_SH_expanded, "\n$marker$quote_type");
128 # Start can never be -1 now, as we've rigged the long string we're
129 # searching with an initial dummy newline.
130 return undef if $start == -1;
132 $start += length($marker) + 2;
134 my $value = substr($Config_SH_expanded, $start,
135 index($Config_SH_expanded, "$quote_type\n", $start)
138 # If we had a double-quote, we'd better eval it so escape
139 # sequences and such can be interpolated. Since the incoming
140 # value is supposed to follow shell rules and not perl rules,
141 # we escape any perl variable markers
142 if ($quote_type eq '"') {
143 $value =~ s/\$/\\\$/g;
144 $value =~ s/\@/\\\@/g;
145 eval "\$value = \"$value\"";
148 # So we can say "if $Config{'foo'}".
149 $value = undef if $value eq 'undef';
150 $self->{$key} = $value; # cache it
157 open(CONFIG_SH, 'config.sh') || die "Can't open config.sh: $!";
158 while (<CONFIG_SH>) {
159 next if m:^#!/bin/sh:;
161 # Catch PERL_CONFIG_SH=true and PERL_VERSION=n line from Configure.
162 s/^(\w+)=(true|\d+)\s*$/$1='$2'\n/ or m/^(\w+)='(.*)'$/;
163 my($k, $v) = ($1, $2);
165 # grandfather PATCHLEVEL and SUBVERSION and CONFIG
167 if ($k eq 'PERL_VERSION') {
168 push @v_others, "PATCHLEVEL='$v'\n";
170 elsif ($k eq 'PERL_SUBVERSION') {
171 push @v_others, "SUBVERSION='$v'\n";
173 elsif ($k eq 'PERL_CONFIG_SH') {
174 push @v_others, "CONFIG='$v'\n";
178 # We can delimit things in config.sh with either ' or ".
179 unless ($in_v or m/^(\w+)=(['"])(.*\n)/){
180 push(@non_v, "#$_"); # not a name='value' line
188 ($name,$val) = ($1,$3);
190 $in_v = $val !~ /$quote\n/;
193 s,/,::,g if $Extensions{$name};
195 $val =~ s/$quote\n?\z//;
197 my $line = "$name=$quote$val$quote\n";
198 if (!$Common{$name}){
199 push(@v_others, $line);
202 push(@v_fast, $line);
203 $v_fast{$name} = "'$name' => $quote$val$quote";
208 # Calculation for the keys for byteorder
209 # This is somewhat grim, but I need to run fetch_string here.
210 our $Config_SH_expanded = join "\n", '', @v_fast, @v_others;
212 my $t = fetch_string ({}, 'ivtype');
213 my $s = fetch_string ({}, 'ivsize');
215 # byteorder does exist on its own but we overlay a virtual
216 # dynamically recomputed value.
218 # However, ivtype and ivsize will not vary for sane fat binaries
220 my $f = $t eq 'long' ? 'L!' : $s == 8 ? 'Q': 'I';
223 if ($s == 4 || $s == 8) {
224 my $list = join ',', reverse(2..$s);
226 $byteorder_code = <<"EOT";
228 foreach my \$c ($list) { \$i |= ord(\$c); \$i <<= 8 }
230 my \$byteorder = join('', unpack('$format', pack('$f', \$i)));
233 $byteorder_code = "my \$byteorder = '?'x$s;\n";
236 print CONFIG @non_v, "\n";
238 # copy config summary format from the myconfig.SH script
239 print CONFIG "our \$summary : unique = <<'!END!';\n";
240 open(MYCONFIG,"<myconfig.SH") || die "open myconfig.SH failed: $!";
241 1 while defined($_ = <MYCONFIG>) && !/^Summary of/;
242 do { print CONFIG $_ } until !defined($_ = <MYCONFIG>) || /^\s*$/;
245 # NB. as $summary is unique, we need to copy it in a lexical variable
246 # before expanding it, because may have been made readonly if a perl
247 # interpreter has been cloned.
249 print CONFIG "\n!END!\n", $byteorder_code, <<'EOT';
250 my $summary_expanded;
253 return $summary_expanded if $summary_expanded;
254 ($summary_expanded = $summary) =~ s{\$(\w+)}
255 { my $c = $Config{$1}; defined($c) ? $c : 'undef' }ge;
263 print CONFIG join("", @v_fast, sort @v_others);
265 print CONFIG <<'EOT';
267 s/(byteorder=)(['"]).*?\2/$1$2$byteorder$2/m;
268 our $Config_SH : unique = $_;
270 our $Config_SH_expanded : unique = "\n$_" . << 'EOVIRTUAL';
273 foreach my $prefix (qw(ccflags ldflags)) {
274 my $value = fetch_string ({}, $prefix);
275 my $withlargefiles = fetch_string ({}, $prefix . "_uselargefiles");
276 $value =~ s/\Q$withlargefiles\E\b//;
277 print CONFIG "${prefix}_nolargefiles='$value'\n";
280 foreach my $prefix (qw(libs libswanted)) {
281 my $value = fetch_string ({}, $prefix);
283 = split(' ', fetch_string ({}, 'libswanted_uselargefiles'));
286 @lflibswanted{@lflibswanted} = ();
287 if ($prefix eq 'libs') {
288 my @libs = grep { /^-l(.+)/ &&
289 not exists $lflibswanted{$1} }
290 split(' ', fetch_string ({}, 'libs'));
291 $value = join(' ', @libs);
293 my @libswanted = grep { not exists $lflibswanted{$_} }
294 split(' ', fetch_string ({}, 'libswanted'));
295 $value = join(' ', @libswanted);
298 print CONFIG "${prefix}_nolargefiles='$value'\n";
301 print CONFIG "EOVIRTUAL\n";
303 print CONFIG $fetch_string;
305 print CONFIG <<'ENDOFEND';
308 my($self, $key) = @_;
310 # check for cached value (which may be undef so we use exists not defined)
311 return $self->{$key} if exists $self->{$key};
313 return $self->fetch_string($key);
320 substr($Config_SH_expanded, 0, index($Config_SH_expanded, '=') );
324 # Find out how the current key's quoted so we can skip to its end.
325 my $quote = substr($Config_SH_expanded,
326 index($Config_SH_expanded, "=", $prevpos)+1, 1);
327 my $pos = index($Config_SH_expanded, qq($quote\n), $prevpos) + 2;
328 my $len = index($Config_SH_expanded, "=", $pos) - $pos;
330 $len > 0 ? substr($Config_SH_expanded, $pos, $len) : undef;
334 return 1 if exists($_[0]->{$_[1]});
336 return(index($Config_SH_expanded, "\n$_[1]='") != -1 or
337 substr($Config_SH_expanded, 0, length($_[1])+2) eq "$_[1]='" or
338 index($Config_SH_expanded, "\n$_[1]=\"") != -1 or
339 substr($Config_SH_expanded, 0, length($_[1])+2) eq "$_[1]=\"" or
340 $_[1] =~ /^(?:(?:cc|ld)flags|libs(?:wanted)?)_nolargefiles$/
344 sub STORE { die "\%Config::Config is read-only\n" }
355 return map { chomp; $_ } grep eval{ /^(?:$re)=/ }, split /^/,
360 # implements -V:cfgvar option (see perlrun -V:)
362 # find optional leading, trailing colons; and query-spec
363 my ($notag,$qry,$lncont) = m/^(:)?(.*?)(:)?$/; # flags fore and aft,
364 # map colon-flags to print decorations
365 my $prfx = $notag ? '': "$qry="; # tag-prefix for print
366 my $lnend = $lncont ? ' ' : ";\n"; # line ending for print
368 # all config-vars are by definition \w only, any \W means regex
370 my @matches = config_re($qry);
371 print map "$_$lnend", @matches ? @matches : "$qry: not found" if !$notag;
372 print map { s/\w+=//; "$_$lnend" } @matches ? @matches : "$qry: not found" if $notag;
374 my $v = (exists $Config{$qry}) ? $Config{$qry} : 'UNKNOWN';
375 $v = 'undef' unless defined $v;
376 print "${prfx}'${v}'$lnend";
384 print CONFIG <<'ENDOFSET';
387 my ($value, $v) = $Config_SH_expanded =~ m/^used_aout='(.*)'\s*$/m;
388 for (split ' ', $value) {
389 ($v) = $Config_SH_expanded =~ m/^aout_$_='(.*)'\s*$/m;
390 $preconfig{$_} = $v eq 'undef' ? undef : $v;
393 $preconfig{d_fork} = undef unless $OS2::can_fork; # Some funny cases can't
394 sub TIEHASH { bless {%preconfig} }
396 # Extract the name of the DLL from the makefile to avoid duplication
397 my ($f) = grep -r, qw(GNUMakefile Makefile);
399 if (open my $fh, '<', $f) {
401 $dll = $1, last if /^PERL_DLL_BASE\s*=\s*(\S*)\s*$/;
404 print CONFIG <<ENDOFSET if $dll;
405 \$preconfig{dll_name} = '$dll';
408 print CONFIG <<'ENDOFSET';
415 my $fast_config = join '', map { " $_,\n" }
416 sort values (%v_fast), 'byteorder => $byteorder' ;
418 print CONFIG sprintf <<'ENDOFTIE', $fast_config;
420 # avoid Config..Exporter..UNIVERSAL search for DESTROY then AUTOLOAD
423 tie %%Config, 'Config', {
431 open(CONFIG_POD, ">lib/Config.pod") or die "Can't open lib/Config.pod: $!";
432 print CONFIG_POD <<'ENDOFTAIL';
435 Config - access Perl configuration information
440 if ($Config{usethreads}) {
441 print "has thread support\n"
444 use Config qw(myconfig config_sh config_vars config_re);
452 config_vars(qw(osname archname));
457 The Config module contains all the information that was available to
458 the C<Configure> program at Perl build time (over 900 values).
460 Shell variables from the F<config.sh> file (written by Configure) are
461 stored in the readonly-variable C<%Config>, indexed by their names.
463 Values stored in config.sh as 'undef' are returned as undefined
464 values. The perl C<exists> function can be used to check if a
465 named variable exists.
471 Returns a textual summary of the major perl configuration values.
472 See also C<-V> in L<perlrun/Switches>.
476 Returns the entire perl configuration information in the form of the
477 original config.sh shell variable assignment script.
479 =item config_re($regex)
481 Like config_sh() but returns, as a list, only the config entries who's
482 names match the $regex.
484 =item config_vars(@names)
486 Prints to STDOUT the values of the named configuration variable. Each is
487 printed on a separate line in the form:
491 Names which are unknown are output as C<name='UNKNOWN';>.
492 See also C<-V:name> in L<perlrun/Switches>.
498 Here's a more sophisticated example of using %Config:
505 unless($Config{sig_name} && $Config{sig_num}) {
508 my @names = split ' ', $Config{sig_name};
509 @sig_num{@names} = split ' ', $Config{sig_num};
511 $sig_name[$sig_num{$_}] ||= $_;
515 print "signal #17 = $sig_name[17]\n";
516 if ($sig_num{ALRM}) {
517 print "SIGALRM is $sig_num{ALRM}\n";
522 Because this information is not stored within the perl executable
523 itself it is possible (but unlikely) that the information does not
524 relate to the actual perl binary which is being used to access it.
526 The Config module is installed into the architecture and version
527 specific library directory ($Config{installarchlib}) and it checks the
528 perl version number when loaded.
530 The values stored in config.sh may be either single-quoted or
531 double-quoted. Double-quoted strings are handy for those cases where you
532 need to include escape sequences in the strings. To avoid runtime variable
533 interpolation, any C<$> and C<@> characters are replaced by C<\$> and
534 C<\@>, respectively. This isn't foolproof, of course, so don't embed C<\$>
535 or C<\@> in double-quoted strings unless you're willing to deal with the
536 consequences. (The slashes will end up escaped and the C<$> or C<@> will
537 trigger variable interpolation)
541 Most C<Config> variables are determined by the C<Configure> script
542 on platforms supported by it (which is most UNIX platforms). Some
543 platforms have custom-made C<Config> variables, and may thus not have
544 some of the variables described below, or may have extraneous variables
545 specific to that particular port. See the port specific documentation
550 if ($Opts{glossary}) {
551 open(GLOS, "<$Glossary") or die "Can't open $Glossary: $!";
558 if (s/\A(\w*)\s+\(([\w.]+)\):\s*\n(\t?)/=item C<$1>\n\nFrom F<$2>:\n\n/m) {
559 my $c = substr $1, 0, 1;
560 unless ($seen{$c}++) {
561 print CONFIG_POD <<EOF if $text;
565 print CONFIG_POD <<EOF;
574 elsif (!$text || !/\A\t/) {
575 warn "Expected a Configure variable header",
576 ($text ? " or another paragraph of description" : () );
578 s/n't/n\00t/g; # leave can't, won't etc untouched
579 s/^\t\s+(.*)/\n$1/gm; # Indented lines ===> new paragraph
580 s/^(?<!\n\n)\t(.*)/$1/gm; # Not indented lines ===> text
581 s{([\'\"])(?=[^\'\"\s]*[./][^\'\"\s]*\1)([^\'\"\s]+)\1}(F<$2>)g; # '.o'
582 s{([\'\"])([^\'\"\s]+)\1}(C<$2>)g; # "date" command
583 s{\'([A-Za-z_\- *=/]+)\'}(C<$1>)g; # 'ln -s'
585 (?<! [\w./<\'\"] ) # Only standalone file names
586 (?! e \. g \. ) # Not e.g.
587 (?! \. \. \. ) # Not ...
589 (?! read/ ) # Not read/write
590 (?! etc\. ) # Not etc.
593 \$ ? # Allow leading $
594 [\w./]* [./] [\w./]* # Require . or / inside
596 (?<! \. (?= [\s)] ) ) # Do not include trailing dot
597 (?! [\w/] ) # Include all of it
599 (F<$1>)xg; # /usr/local
600 s/((?<=\s)~\w*)/F<$1>/g; # ~name
601 s/(?<![.<\'\"])\b([A-Z_]{2,})\b(?![\'\"])/C<$1>/g; # UNISTD
602 s/(?<![.<\'\"])\b(?!the\b)(\w+)\s+macro\b/C<$1> macro/g; # FILE_cnt macro
603 s/n[\0]t/n't/g; # undo can't, won't damage
606 if ($Opts{glossary}) {
607 <GLOS>; # Skip the "DO NOT EDIT"
608 <GLOS>; # Skip the preamble
615 print CONFIG_POD <<'ENDOFTAIL';
621 This module contains a good example of how to use tie to implement a
622 cache and an example of how to make a tied variable readonly to those
633 # Now create Cross.pm if needed
635 open CROSS, ">lib/Cross.pm" or die "Can not open >lib/Cross.pm: $!";
637 # typical invocation:
638 # perl -MCross Makefile.PL
639 # perl -MCross=wince -V:cc
643 my ($package,$platform) = @_;
644 unless (defined $platform) {
645 # if $platform is not specified, then use last one when
646 # 'configpm; was invoked with --cross option
647 $platform = '***replace-marker***';
649 @INC = map {/\blib\b/?(do{local $_=$_;s/\blib\b/xlib\/$platform/;$_},$_):($_)} @INC;
650 $::Cross::platform = $platform;
655 $cross =~ s/\*\*\*replace-marker\*\*\*/$Opts{cross}/g;
660 # Now do some simple tests on the Config.pm file we have created
665 die "$0: $Config_PM not valid"
666 unless $Config{'PERL_CONFIG_SH'} eq 'true';
668 die "$0: error processing $Config_PM"
669 if defined($Config{'an impossible name'})
670 or $Config{'PERL_CONFIG_SH'} ne 'true' # test cache
673 die "$0: error processing $Config_PM"
674 if eval '$Config{"cc"} = 1'
675 or eval 'delete $Config{"cc"}'