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, "\n$marker$quote_type");
123 # If that failed, check for " delimited
126 $start = index($Config_SH, "\n$marker$quote_type");
128 return undef if ( ($start == -1) && # in case it's first
129 (substr($Config_SH, 0, length($marker)) ne $marker) );
131 # It's the very first thing we found. Skip $start forward
132 # and figure out the quote mark after the =.
133 $start = length($marker) + 1;
134 $quote_type = substr($Config_SH, $start - 1, 1);
137 $start += length($marker) + 2;
140 my $value = substr($Config_SH, $start,
141 index($Config_SH, "$quote_type\n", $start) - $start);
143 # If we had a double-quote, we'd better eval it so escape
144 # sequences and such can be interpolated. Since the incoming
145 # value is supposed to follow shell rules and not perl rules,
146 # we escape any perl variable markers
147 if ($quote_type eq '"') {
148 $value =~ s/\$/\\\$/g;
149 $value =~ s/\@/\\\@/g;
150 eval "\$value = \"$value\"";
153 # So we can say "if $Config{'foo'}".
154 $value = undef if $value eq 'undef';
155 $self->{$key} = $value; # cache it
162 open(CONFIG_SH, 'config.sh') || die "Can't open config.sh: $!";
163 while (<CONFIG_SH>) {
164 next if m:^#!/bin/sh:;
166 # Catch PERL_CONFIG_SH=true and PERL_VERSION=n line from Configure.
167 s/^(\w+)=(true|\d+)\s*$/$1='$2'\n/ or m/^(\w+)='(.*)'$/;
168 my($k, $v) = ($1, $2);
170 # grandfather PATCHLEVEL and SUBVERSION and CONFIG
172 if ($k eq 'PERL_VERSION') {
173 push @v_others, "PATCHLEVEL='$v'\n";
175 elsif ($k eq 'PERL_SUBVERSION') {
176 push @v_others, "SUBVERSION='$v'\n";
178 elsif ($k eq 'PERL_CONFIG_SH') {
179 push @v_others, "CONFIG='$v'\n";
183 # We can delimit things in config.sh with either ' or ".
184 unless ($in_v or m/^(\w+)=(['"])(.*\n)/){
185 push(@non_v, "#$_"); # not a name='value' line
193 ($name,$val) = ($1,$3);
195 $in_v = $val !~ /$quote\n/;
198 s,/,::,g if $Extensions{$name};
200 $val =~ s/$quote\n?\z//;
202 my $line = "$name=$quote$val$quote\n";
203 if (!$Common{$name}){
204 push(@v_others, $line);
207 push(@v_fast, $line);
208 $v_fast{$name} = "'$name' => $quote$val$quote";
213 # Calculation for the keys for byteorder
214 # This is somewhat grim, but I need to run fetch_string here.
215 our $Config_SH = join "\n", @v_fast, @v_others;
217 my $t = fetch_string ({}, 'ivtype');
218 my $s = fetch_string ({}, 'ivsize');
220 # byteorder does exist on its own but we overlay a virtual
221 # dynamically recomputed value.
223 # However, ivtype and ivsize will not vary for sane fat binaries
225 my $f = $t eq 'long' ? 'L!' : $s == 8 ? 'Q': 'I';
228 if ($s == 4 || $s == 8) {
229 my $list = join ',', reverse(2..$s);
231 $byteorder_code = <<"EOT";
233 foreach my \$c ($list) { \$i |= ord(\$c); \$i <<= 8 }
235 my \$byteorder = join('', unpack('$format', pack('$f', \$i)));
238 $byteorder_code = "my \$byteorder = '?'x$s;\n";
241 print CONFIG @non_v, "\n";
243 # copy config summary format from the myconfig.SH script
244 print CONFIG "our \$summary : unique = <<'!END!';\n";
245 open(MYCONFIG,"<myconfig.SH") || die "open myconfig.SH failed: $!";
246 1 while defined($_ = <MYCONFIG>) && !/^Summary of/;
247 do { print CONFIG $_ } until !defined($_ = <MYCONFIG>) || /^\s*$/;
250 # NB. as $summary is unique, we need to copy it in a lexical variable
251 # before expanding it, because may have been made readonly if a perl
252 # interpreter has been cloned.
254 print CONFIG "\n!END!\n", $byteorder_code, <<'EOT';
255 my $summary_expanded;
258 return $summary_expanded if $summary_expanded;
259 ($summary_expanded = $summary) =~ s{\$(\w+)}
260 { my $c = $Config{$1}; defined($c) ? $c : 'undef' }ge;
268 print CONFIG join("", @v_fast, sort @v_others);
270 print CONFIG <<'EOT';
272 s/(byteorder=)(['"]).*?\2/$1$2$byteorder$2/m;
273 our $Config_SH : unique = $_;
276 print CONFIG $fetch_string;
278 print CONFIG <<'ENDOFEND';
281 my($self, $key) = @_;
285 if ($key =~ /^((?:cc|ld)flags|libs(?:wanted)?)_nolargefiles/) {
286 # These are purely virtual, they do not exist, but need to
287 # be computed on demand for largefile-incapable extensions.
288 my $new_key = "${1}_uselargefiles";
289 $value = $Config{$1};
290 my $withlargefiles = $Config{$new_key};
291 if ($new_key =~ /^(?:cc|ld)flags_/) {
292 $value =~ s/\Q$withlargefiles\E\b//;
293 } elsif ($new_key =~ /^libs/) {
294 my @lflibswanted = split(' ', $Config{libswanted_uselargefiles});
297 @lflibswanted{@lflibswanted} = ();
298 if ($new_key =~ /^libs_/) {
299 my @libs = grep { /^-l(.+)/ &&
300 not exists $lflibswanted{$1} }
301 split(' ', $Config{libs});
302 $Config{libs} = join(' ', @libs);
303 } elsif ($new_key =~ /^libswanted_/) {
304 my @libswanted = grep { not exists $lflibswanted{$_} }
305 split(' ', $Config{libswanted});
306 $Config{libswanted} = join(' ', @libswanted);
312 $self->{$key} = $value;
316 my($self, $key) = @_;
318 # check for cached value (which may be undef so we use exists not defined)
319 return $self->{$key} if exists $self->{$key};
321 $self->fetch_string($key);
322 return $self->{$key} if exists $self->{$key};
323 $self->fetch_virtual($key);
325 # Might not exist, in which undef is correct.
326 return $self->{$key};
333 substr($Config_SH, 0, index($Config_SH, '=') );
337 # Find out how the current key's quoted so we can skip to its end.
338 my $quote = substr($Config_SH, index($Config_SH, "=", $prevpos)+1, 1);
339 my $pos = index($Config_SH, qq($quote\n), $prevpos) + 2;
340 my $len = index($Config_SH, "=", $pos) - $pos;
342 $len > 0 ? substr($Config_SH, $pos, $len) : undef;
346 return 1 if exists($_[0]->{$_[1]});
348 return(index($Config_SH, "\n$_[1]='") != -1 or
349 substr($Config_SH, 0, length($_[1])+2) eq "$_[1]='" or
350 index($Config_SH, "\n$_[1]=\"") != -1 or
351 substr($Config_SH, 0, length($_[1])+2) eq "$_[1]=\"" or
352 $_[1] =~ /^(?:(?:cc|ld)flags|libs(?:wanted)?)_nolargefiles$/
356 sub STORE { die "\%Config::Config is read-only\n" }
367 return map { chomp; $_ } grep eval{ /^(?:$re)=/ }, split /^/, $Config_SH;
372 my ($notag,$qry,$lncont) = m/^(:)?(.*?)(:)?$/; # flags fore and aft,
373 my $prfx = $notag ? '': "$qry="; # prefix for print
374 my $lnend = $lncont ? ' ' : ";\n"; # ending for print
377 my @matches = config_re($qry);
378 print map "$_$lnend", @matches ? @matches : "$qry: not found" if !$notag;
379 print map { s/\w+=//; "$_$lnend" } @matches ? @matches : "$qry: not found" if $notag;
381 my $v = (exists $Config{$qry}) ? $Config{$qry} : 'UNKNOWN';
382 $v = 'undef' unless defined $v;
383 print "${prfx}'${v}'$lnend";
391 print CONFIG <<'ENDOFSET';
394 my ($value, $v) = $Config_SH =~ m/^used_aout='(.*)'\s*$/m;
395 for (split ' ', $value) {
396 ($v) = $Config_SH =~ m/^aout_$_='(.*)'\s*$/m;
397 $preconfig{$_} = $v eq 'undef' ? undef : $v;
400 $preconfig{d_fork} = undef unless $OS2::can_fork; # Some funny cases can't
401 sub TIEHASH { bless {%preconfig} }
403 # Extract the name of the DLL from the makefile to avoid duplication
404 my ($f) = grep -r, qw(GNUMakefile Makefile);
406 if (open my $fh, '<', $f) {
408 $dll = $1, last if /^PERL_DLL_BASE\s*=\s*(\S*)\s*$/;
411 print CONFIG <<ENDOFSET if $dll;
412 \$preconfig{dll_name} = '$dll';
415 print CONFIG <<'ENDOFSET';
422 my $fast_config = join '', map { " $_,\n" }
423 sort values (%v_fast), 'byteorder => $byteorder' ;
425 print CONFIG sprintf <<'ENDOFTIE', $fast_config;
427 # avoid Config..Exporter..UNIVERSAL search for DESTROY then AUTOLOAD
430 tie %%Config, 'Config', {
438 open(CONFIG_POD, ">lib/Config.pod") or die "Can't open lib/Config.pod: $!";
439 print CONFIG_POD <<'ENDOFTAIL';
442 Config - access Perl configuration information
447 if ($Config{usethreads}) {
448 print "has thread support\n"
451 use Config qw(myconfig config_sh config_vars config_re);
459 config_vars(qw(osname archname));
464 The Config module contains all the information that was available to
465 the C<Configure> program at Perl build time (over 900 values).
467 Shell variables from the F<config.sh> file (written by Configure) are
468 stored in the readonly-variable C<%Config>, indexed by their names.
470 Values stored in config.sh as 'undef' are returned as undefined
471 values. The perl C<exists> function can be used to check if a
472 named variable exists.
478 Returns a textual summary of the major perl configuration values.
479 See also C<-V> in L<perlrun/Switches>.
483 Returns the entire perl configuration information in the form of the
484 original config.sh shell variable assignment script.
486 =item config_re($regex)
488 Like config_sh() but returns, as a list, only the config entries who's
489 names match the $regex.
491 =item config_vars(@names)
493 Prints to STDOUT the values of the named configuration variable. Each is
494 printed on a separate line in the form:
498 Names which are unknown are output as C<name='UNKNOWN';>.
499 See also C<-V:name> in L<perlrun/Switches>.
505 Here's a more sophisticated example of using %Config:
512 unless($Config{sig_name} && $Config{sig_num}) {
515 my @names = split ' ', $Config{sig_name};
516 @sig_num{@names} = split ' ', $Config{sig_num};
518 $sig_name[$sig_num{$_}] ||= $_;
522 print "signal #17 = $sig_name[17]\n";
523 if ($sig_num{ALRM}) {
524 print "SIGALRM is $sig_num{ALRM}\n";
529 Because this information is not stored within the perl executable
530 itself it is possible (but unlikely) that the information does not
531 relate to the actual perl binary which is being used to access it.
533 The Config module is installed into the architecture and version
534 specific library directory ($Config{installarchlib}) and it checks the
535 perl version number when loaded.
537 The values stored in config.sh may be either single-quoted or
538 double-quoted. Double-quoted strings are handy for those cases where you
539 need to include escape sequences in the strings. To avoid runtime variable
540 interpolation, any C<$> and C<@> characters are replaced by C<\$> and
541 C<\@>, respectively. This isn't foolproof, of course, so don't embed C<\$>
542 or C<\@> in double-quoted strings unless you're willing to deal with the
543 consequences. (The slashes will end up escaped and the C<$> or C<@> will
544 trigger variable interpolation)
548 Most C<Config> variables are determined by the C<Configure> script
549 on platforms supported by it (which is most UNIX platforms). Some
550 platforms have custom-made C<Config> variables, and may thus not have
551 some of the variables described below, or may have extraneous variables
552 specific to that particular port. See the port specific documentation
557 if ($Opts{glossary}) {
558 open(GLOS, "<$Glossary") or die "Can't open $Glossary: $!";
565 if (s/\A(\w*)\s+\(([\w.]+)\):\s*\n(\t?)/=item C<$1>\n\nFrom F<$2>:\n\n/m) {
566 my $c = substr $1, 0, 1;
567 unless ($seen{$c}++) {
568 print CONFIG_POD <<EOF if $text;
572 print CONFIG_POD <<EOF;
581 elsif (!$text || !/\A\t/) {
582 warn "Expected a Configure variable header",
583 ($text ? " or another paragraph of description" : () );
585 s/n't/n\00t/g; # leave can't, won't etc untouched
586 s/^\t\s+(.*)/\n$1/gm; # Indented lines ===> new paragraph
587 s/^(?<!\n\n)\t(.*)/$1/gm; # Not indented lines ===> text
588 s{([\'\"])(?=[^\'\"\s]*[./][^\'\"\s]*\1)([^\'\"\s]+)\1}(F<$2>)g; # '.o'
589 s{([\'\"])([^\'\"\s]+)\1}(C<$2>)g; # "date" command
590 s{\'([A-Za-z_\- *=/]+)\'}(C<$1>)g; # 'ln -s'
592 (?<! [\w./<\'\"] ) # Only standalone file names
593 (?! e \. g \. ) # Not e.g.
594 (?! \. \. \. ) # Not ...
596 (?! read/ ) # Not read/write
597 (?! etc\. ) # Not etc.
600 \$ ? # Allow leading $
601 [\w./]* [./] [\w./]* # Require . or / inside
603 (?<! \. (?= [\s)] ) ) # Do not include trailing dot
604 (?! [\w/] ) # Include all of it
606 (F<$1>)xg; # /usr/local
607 s/((?<=\s)~\w*)/F<$1>/g; # ~name
608 s/(?<![.<\'\"])\b([A-Z_]{2,})\b(?![\'\"])/C<$1>/g; # UNISTD
609 s/(?<![.<\'\"])\b(?!the\b)(\w+)\s+macro\b/C<$1> macro/g; # FILE_cnt macro
610 s/n[\0]t/n't/g; # undo can't, won't damage
613 if ($Opts{glossary}) {
614 <GLOS>; # Skip the "DO NOT EDIT"
615 <GLOS>; # Skip the preamble
622 print CONFIG_POD <<'ENDOFTAIL';
628 This module contains a good example of how to use tie to implement a
629 cache and an example of how to make a tied variable readonly to those
640 # Now create Cross.pm if needed
642 open CROSS, ">lib/Cross.pm" or die "Can not open >lib/Cross.pm: $!";
644 # typical invocation:
645 # perl -MCross Makefile.PL
646 # perl -MCross=wince -V:cc
650 my ($package,$platform) = @_;
651 unless (defined $platform) {
652 # if $platform is not specified, then use last one when
653 # 'configpm; was invoked with --cross option
654 $platform = '***replace-marker***';
656 @INC = map {/\blib\b/?(do{local $_=$_;s/\blib\b/xlib\/$platform/;$_},$_):($_)} @INC;
657 $::Cross::platform = $platform;
662 $cross =~ s/\*\*\*replace-marker\*\*\*/$Opts{cross}/g;
667 # Now do some simple tests on the Config.pm file we have created
672 die "$0: $Config_PM not valid"
673 unless $Config{'PERL_CONFIG_SH'} eq 'true';
675 die "$0: error processing $Config_PM"
676 if defined($Config{'an impossible name'})
677 or $Config{'PERL_CONFIG_SH'} ne 'true' # test cache
680 die "$0: error processing $Config_PM"
681 if eval '$Config{"cc"} = 1'
682 or eval 'delete $Config{"cc"}'