-#!./miniperl
+#!./miniperl -w
+$config_pm = $ARGV[0] || 'lib/Config.pm';
@ARGV = "./config.sh";
-undef $/;
-$_ = <>;
-s:^#!/bin/sh\n::;
-s/'undef'/undef/g;
-s/\n(\w+)=/;\n\$Config{'$1'} = /g;
-s/;\n\$Config/\n\$Config/;
+# list names to put first (and hence lookup fastest)
+@fast = qw(osname osvers so libpth archlib
+ sharpbang startsh shsharp
+ dynamic_ext static_ext extensions dl_src
+ sig_name ccflags cppflags intsize);
-open STDOUT, ">lib/Config.pm"
- or die "Can't open lib/Config.pm: $!\n";
+# names of things which may need to have slashes changed to double-colons
+@extensions = qw(dynamic_ext static_ext extensions known_extensions);
+
+
+open CONFIG, ">$config_pm" or die "Can't open $config_pm: $!\n";
$myver = sprintf("%.3f", $]);
-print <<"ENDOFBEG";
+print CONFIG <<"ENDOFBEG";
package Config;
require Exporter;
\@ISA = (Exporter);
\$] == $myver or die sprintf
"Perl lib version ($myver) doesn't match executable version (%.3f)\\n", \$];
+# This file was created by configpm when Perl was built. Any changes
+# made to this file will be lost the next time perl is built.
+
ENDOFBEG
-print $_;
+print CONFIG <<'EndOfPod';
+=head1 NAME
+
+Config - access Perl configuration option
+
+=head1 SYNOPSIS
+
+ use Config;
+ if ($Config{'cc'} =~ /gcc/) {
+ print "built by gcc\n";
+ }
+
+=head1 DESCRIPTION
+
+The Config module contains everything that was available to the
+C<Configure> program at Perl build time. Shell variables from
+F<config.sh> are stored in the readonly-variable C<%Config>, indexed by
+their names.
+
+=head1 EXAMPLE
+
+Here's a more sophisticated example of using %Config:
+
+ use Config;
+
+ defined $Config{sig_name} || die "No sigs?";
+ foreach $name (split(' ', $Config{sig_name})) {
+ $signo{$name} = $i;
+ $signame[$i] = $name;
+ $i++;
+ }
+
+ print "signal #17 = $signame[17]\n";
+ if ($signo{ALRM}) {
+ print "SIGALRM is $signo{ALRM}\n";
+ }
+
+=head1 NOTE
+
+This module contains a good example of how to make a variable
+readonly to those outside of it.
+
+=cut
+
+EndOfPod
+
+@fast{@fast} = @fast;
+@extensions{@extensions} = @extensions;
+@non_v=();
+@v_fast=();
+@v_others=();
+
+while (<>) {
+ next if m:^#!/bin/sh:;
+ # Catch CONFIG=true and PATCHLEVEL=n line from Configure.
+ s/^(\w+)=(true|\d+)\s*$/$1='$2'\n/;
+ unless (m/^(\w+)='(.*)'\s*$/){
+ push(@non_v, "#$_"); # not a name='value' line
+ next;
+ }
+ $name = $1;
+ if ($extensions{$name}) { s,/,::,g }
+ if (!$fast{$name}){ push(@v_others, $_); next; }
+ push(@v_fast,$_);
+}
+
+foreach(@non_v){ print CONFIG $_ }
+
+print CONFIG "\n",
+ "\$config_sh=<<'!END!OF!CONFIG!';\n",
+ join("", @v_fast, sort @v_others),
+ "!END!OF!CONFIG!\n\n";
+
+
+print CONFIG <<'ENDOFEND';
+
+tie %Config, Config;
+sub TIEHASH { bless {} }
+sub FETCH {
+ # check for cached value (which maybe undef so we use exists not defined)
+ return $_[0]->{$_[1]} if (exists $_[0]->{$_[1]});
+
+ my($value); # search for the item in the big $config_sh string
+ return undef unless (($value) = $config_sh =~ m/^$_[1]='(.*)'\s*$/m);
+
+ $value = undef if $value eq 'undef'; # So we can say "if $Config{'foo'}".
+ $_[0]->{$_[1]} = $value; # cache it
+ return $value;
+}
+
+sub FIRSTKEY {
+ $prevpos = 0;
+ my $key;
+ ($key) = $config_sh =~ m/^(.*)=/;
+ $key;
+}
+
+sub NEXTKEY {
+ my ($pos, $len);
+ $pos = $prevpos;
+ $pos = index( $config_sh, "\n", $pos) + 1;
+ $prevpos = $pos;
+ $len = index( $config_sh, "=", $pos) - $pos;
+ $len > 0 ? substr( $config_sh, $pos, $len) : undef;
+}
+
+sub EXISTS{
+ exists($_[0]->{$_[1]}) or $config_sh =~ m/^$_[1]=/m;
+}
+
+sub readonly { die "\%Config::Config is read-only\n" }
+
+sub myconfig {
+ my($output);
+
+ $output = <<'END';
+Summary of my $package (patchlevel $PATCHLEVEL) configuration:
+ Platform:
+ osname=$osname, osver=$osvers, archname=$archname
+ uname='$myuname'
+ hint=$hint
+ Compiler:
+ cc='$cc', optimize='$optimize'
+ cppflags='$cppflags'
+ ccflags ='$ccflags'
+ ldflags ='$ldflags'
+ stdchar='$stdchar', d_stdstdio=$d_stdstdio, usevfork=$usevfork
+ voidflags=$voidflags, castflags=$castflags, d_casti32=$d_casti32, d_castneg=$d_castneg
+ intsize=$intsize, alignbytes=$alignbytes, usemymalloc=$usemymalloc, randbits=$randbits
+ Libraries:
+ so=$so
+ libpth=$libpth
+ libs=$libs
+ libc=$libc
+ Dynamic Linking:
+ dlsrc=$dlsrc, dlext=$dlext, d_dlsymun=$d_dlsymun
+ cccdlflags='$cccdlflags', ccdlflags='$ccdlflags', lddlflags='$lddlflags'
+
+END
+ $output =~ s/\$(\w+)/$Config{$1}/ge;
+ $output;
+}
+
+sub STORE { &readonly }
+sub DELETE{ &readonly }
+sub CLEAR { &readonly }
+
+
+1;
+ENDOFEND
+
+close(CONFIG);
+
+# Now do some simple tests on the Config.pm file we have created
+unshift(@INC,'lib');
+require $config_pm;
+import Config;
+
+die "$0: $config_pm not valid"
+ unless $Config{'CONFIG'} eq 'true';
+
+die "$0: error processing $config_pm"
+ if defined($Config{'an impossible name'})
+ or $Config{'CONFIG'} ne 'true' # test cache
+ ;
+
+die "$0: error processing $config_pm"
+ if eval '$Config{"cc"} = 1'
+ or eval 'delete $Config{"cc"}'
+ ;
+
+exit 0;
projects / p5sagit/p5-mst-13.2.git / blobdiff