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 print CONFIG @non_v, "\n";
215 # copy config summary format from the myconfig.SH script
216 print CONFIG "our \$summary : unique = <<'!END!';\n";
217 open(MYCONFIG,"<myconfig.SH") || die "open myconfig.SH failed: $!";
218 1 while defined($_ = <MYCONFIG>) && !/^Summary of/;
219 do { print CONFIG $_ } until !defined($_ = <MYCONFIG>) || /^\s*$/;
222 # NB. as $summary is unique, we need to copy it in a lexical variable
223 # before expanding it, because may have been made readonly if a perl
224 # interpreter has been cloned.
226 print CONFIG "\n!END!\n", <<'EOT';
227 my $summary_expanded;
230 return $summary_expanded if $summary_expanded;
231 ($summary_expanded = $summary) =~ s{\$(\w+)}
232 { my $c = $Config{$1}; defined($c) ? $c : 'undef' }ge;
236 our $Config_SH : unique = <<'!END!';
239 print CONFIG join("", @v_fast, sort @v_others);
241 print CONFIG "!END!\n", $fetch_string;
243 print CONFIG <<'ENDOFEND';
246 my($self, $key) = @_;
250 if ($key =~ /^((?:cc|ld)flags|libs(?:wanted)?)_nolargefiles/) {
251 # These are purely virtual, they do not exist, but need to
252 # be computed on demand for largefile-incapable extensions.
253 my $new_key = "${1}_uselargefiles";
254 $value = $Config{$1};
255 my $withlargefiles = $Config{$new_key};
256 if ($new_key =~ /^(?:cc|ld)flags_/) {
257 $value =~ s/\Q$withlargefiles\E\b//;
258 } elsif ($new_key =~ /^libs/) {
259 my @lflibswanted = split(' ', $Config{libswanted_uselargefiles});
262 @lflibswanted{@lflibswanted} = ();
263 if ($new_key =~ /^libs_/) {
264 my @libs = grep { /^-l(.+)/ &&
265 not exists $lflibswanted{$1} }
266 split(' ', $Config{libs});
267 $Config{libs} = join(' ', @libs);
268 } elsif ($new_key =~ /^libswanted_/) {
269 my @libswanted = grep { not exists $lflibswanted{$_} }
270 split(' ', $Config{libswanted});
271 $Config{libswanted} = join(' ', @libswanted);
277 $self->{$key} = $value;
281 my($self, $key) = @_;
283 # check for cached value (which may be undef so we use exists not defined)
284 return $self->{$key} if exists $self->{$key};
286 $self->fetch_string($key);
287 return $self->{$key} if exists $self->{$key};
288 $self->fetch_virtual($key);
290 # Might not exist, in which undef is correct.
291 return $self->{$key};
298 substr($Config_SH, 0, index($Config_SH, '=') );
302 # Find out how the current key's quoted so we can skip to its end.
303 my $quote = substr($Config_SH, index($Config_SH, "=", $prevpos)+1, 1);
304 my $pos = index($Config_SH, qq($quote\n), $prevpos) + 2;
305 my $len = index($Config_SH, "=", $pos) - $pos;
307 $len > 0 ? substr($Config_SH, $pos, $len) : undef;
311 return 1 if exists($_[0]->{$_[1]});
313 return(index($Config_SH, "\n$_[1]='") != -1 or
314 substr($Config_SH, 0, length($_[1])+2) eq "$_[1]='" or
315 index($Config_SH, "\n$_[1]=\"") != -1 or
316 substr($Config_SH, 0, length($_[1])+2) eq "$_[1]=\"" or
317 $_[1] =~ /^(?:(?:cc|ld)flags|libs(?:wanted)?)_nolargefiles$/
321 sub STORE { die "\%Config::Config is read-only\n" }
332 return map { chomp; $_ } grep /^$re=/, split /^/, $Config_SH;
338 my @matches = config_re($_);
339 print map "$_\n", @matches ? @matches : "$_: not found";
341 my $v = (exists $Config{$_}) ? $Config{$_} : 'UNKNOWN';
342 $v = 'undef' unless defined $v;
351 print CONFIG <<'ENDOFSET';
354 my ($value, $v) = $Config_SH =~ m/^used_aout='(.*)'\s*$/m;
355 for (split ' ', $value) {
356 ($v) = $Config_SH =~ m/^aout_$_='(.*)'\s*$/m;
357 $preconfig{$_} = $v eq 'undef' ? undef : $v;
360 $preconfig{d_fork} = undef unless $OS2::can_fork; # Some funny cases can't
361 sub TIEHASH { bless {%preconfig} }
363 # Extract the name of the DLL from the makefile to avoid duplication
364 my ($f) = grep -r, qw(GNUMakefile Makefile);
366 if (open my $fh, '<', $f) {
368 $dll = $1, last if /^PERL_DLL_BASE\s*=\s*(\S*)\s*$/;
371 print CONFIG <<ENDOFSET if $dll;
372 \$preconfig{dll_name} = '$dll';
375 print CONFIG <<'ENDOFSET';
383 # Calculation for the keys for byteorder
384 # This is somewhat grim, but I need to run fetch_string here.
385 our $Config_SH = join "\n", @v_fast, @v_others;
387 my $t = fetch_string ({}, 'ivtype');
388 my $s = fetch_string ({}, 'ivsize');
390 # byteorder does exist on its own but we overlay a virtual
391 # dynamically recomputed value.
393 # However, ivtype and ivsize will not vary for sane fat binaries
395 my $f = $t eq 'long' ? 'L!' : $s == 8 ? 'Q': 'I';
398 if ($s == 4 || $s == 8) {
399 my $list = join ',', reverse(2..$s);
401 $byteorder_code = <<"EOT";
403 foreach my \$c ($list) { \$i |= ord(\$c); \$i <<= 8 }
405 my \$value = join('', unpack('$format', pack('$f', \$i)));
408 $byteorder_code = "\$value = '?'x$s;\n";
411 my $fast_config = join '', map { " $_,\n" }
412 sort values (%v_fast), 'byteorder => $value' ;
414 print CONFIG sprintf <<'ENDOFTIE', $byteorder_code, $fast_config;
416 # avoid Config..Exporter..UNIVERSAL search for DESTROY then AUTOLOAD
421 tie %%Config, 'Config', {
429 open(CONFIG_POD, ">lib/Config.pod") or die "Can't open lib/Config.pod: $!";
430 print CONFIG_POD <<'ENDOFTAIL';
433 Config - access Perl configuration information
438 if ($Config{'cc'} =~ /gcc/) {
439 print "built by gcc\n";
442 use Config qw(myconfig config_sh config_vars config_re);
450 config_vars(qw(osname archname));
455 The Config module contains all the information that was available to
456 the C<Configure> program at Perl build time (over 900 values).
458 Shell variables from the F<config.sh> file (written by Configure) are
459 stored in the readonly-variable C<%Config>, indexed by their names.
461 Values stored in config.sh as 'undef' are returned as undefined
462 values. The perl C<exists> function can be used to check if a
463 named variable exists.
469 Returns a textual summary of the major perl configuration values.
470 See also C<-V> in L<perlrun/Switches>.
474 Returns the entire perl configuration information in the form of the
475 original config.sh shell variable assignment script.
477 =item config_re($regex)
479 Like config_sh() but returns, as a list, only the config entries who's
480 names match the $regex.
482 =item config_vars(@names)
484 Prints to STDOUT the values of the named configuration variable. Each is
485 printed on a separate line in the form:
489 Names which are unknown are output as C<name='UNKNOWN';>.
490 See also C<-V:name> in L<perlrun/Switches>.
496 Here's a more sophisticated example of using %Config:
503 unless($Config{sig_name} && $Config{sig_num}) {
506 my @names = split ' ', $Config{sig_name};
507 @sig_num{@names} = split ' ', $Config{sig_num};
509 $sig_name[$sig_num{$_}] ||= $_;
513 print "signal #17 = $sig_name[17]\n";
514 if ($sig_num{ALRM}) {
515 print "SIGALRM is $sig_num{ALRM}\n";
520 Because this information is not stored within the perl executable
521 itself it is possible (but unlikely) that the information does not
522 relate to the actual perl binary which is being used to access it.
524 The Config module is installed into the architecture and version
525 specific library directory ($Config{installarchlib}) and it checks the
526 perl version number when loaded.
528 The values stored in config.sh may be either single-quoted or
529 double-quoted. Double-quoted strings are handy for those cases where you
530 need to include escape sequences in the strings. To avoid runtime variable
531 interpolation, any C<$> and C<@> characters are replaced by C<\$> and
532 C<\@>, respectively. This isn't foolproof, of course, so don't embed C<\$>
533 or C<\@> in double-quoted strings unless you're willing to deal with the
534 consequences. (The slashes will end up escaped and the C<$> or C<@> will
535 trigger variable interpolation)
539 Most C<Config> variables are determined by the C<Configure> script
540 on platforms supported by it (which is most UNIX platforms). Some
541 platforms have custom-made C<Config> variables, and may thus not have
542 some of the variables described below, or may have extraneous variables
543 specific to that particular port. See the port specific documentation
548 if ($Opts{glossary}) {
549 open(GLOS, "<$Glossary") or die "Can't open $Glossary: $!";
556 if (s/\A(\w*)\s+\(([\w.]+)\):\s*\n(\t?)/=item C<$1>\n\nFrom F<$2>:\n\n/m) {
557 my $c = substr $1, 0, 1;
558 unless ($seen{$c}++) {
559 print CONFIG_POD <<EOF if $text;
563 print CONFIG_POD <<EOF;
572 elsif (!$text || !/\A\t/) {
573 warn "Expected a Configure variable header",
574 ($text ? " or another paragraph of description" : () );
576 s/n't/n\00t/g; # leave can't, won't etc untouched
577 s/^\t\s+(.*)/\n$1/gm; # Indented lines ===> new paragraph
578 s/^(?<!\n\n)\t(.*)/$1/gm; # Not indented lines ===> text
579 s{([\'\"])(?=[^\'\"\s]*[./][^\'\"\s]*\1)([^\'\"\s]+)\1}(F<$2>)g; # '.o'
580 s{([\'\"])([^\'\"\s]+)\1}(C<$2>)g; # "date" command
581 s{\'([A-Za-z_\- *=/]+)\'}(C<$1>)g; # 'ln -s'
583 (?<! [\w./<\'\"] ) # Only standalone file names
584 (?! e \. g \. ) # Not e.g.
585 (?! \. \. \. ) # Not ...
587 (?! read/ ) # Not read/write
588 (?! etc\. ) # Not etc.
591 \$ ? # Allow leading $
592 [\w./]* [./] [\w./]* # Require . or / inside
594 (?<! \. (?= [\s)] ) ) # Do not include trailing dot
595 (?! [\w/] ) # Include all of it
597 (F<$1>)xg; # /usr/local
598 s/((?<=\s)~\w*)/F<$1>/g; # ~name
599 s/(?<![.<\'\"])\b([A-Z_]{2,})\b(?![\'\"])/C<$1>/g; # UNISTD
600 s/(?<![.<\'\"])\b(?!the\b)(\w+)\s+macro\b/C<$1> macro/g; # FILE_cnt macro
601 s/n[\0]t/n't/g; # undo can't, won't damage
604 if ($Opts{glossary}) {
605 <GLOS>; # Skip the "DO NOT EDIT"
606 <GLOS>; # Skip the preamble
613 print CONFIG_POD <<'ENDOFTAIL';
619 This module contains a good example of how to use tie to implement a
620 cache and an example of how to make a tied variable readonly to those
631 # Now create Cross.pm if needed
633 open CROSS, ">lib/Cross.pm" or die "Can not open >lib/Cross.pm: $!";
635 # typical invocation:
636 # perl -MCross Makefile.PL
637 # perl -MCross=wince -V:cc
641 my ($package,$platform) = @_;
642 unless (defined $platform) {
643 # if $platform is not specified, then use last one when
644 # 'configpm; was invoked with --cross option
645 $platform = '***replace-marker***';
647 @INC = map {/\blib\b/?(do{local $_=$_;s/\blib\b/xlib\/$platform/;$_},$_):($_)} @INC;
648 $::Cross::platform = $platform;
653 $cross =~ s/\*\*\*replace-marker\*\*\*/$Opts{cross}/g;
658 # Now do some simple tests on the Config.pm file we have created
663 die "$0: $Config_PM not valid"
664 unless $Config{'PERL_CONFIG_SH'} eq 'true';
666 die "$0: error processing $Config_PM"
667 if defined($Config{'an impossible name'})
668 or $Config{'PERL_CONFIG_SH'} ne 'true' # test cache
671 die "$0: error processing $Config_PM"
672 if eval '$Config{"cc"} = 1'
673 or eval 'delete $Config{"cc"}'