Force linking against the perl dll when using gcc 3.4 on Windows

When a Windows perl links an XS shared object to an import library using
gcc/g++ version 3.4.x, strange breakage happens at load time because the
mutex-related symbols seems not to be reachable. This situation happens
especially for AS perl and the default compiler suite it installs.

We fix this by forcing g++ to link against the dll instead, which should
be in the same directory as the perl executable (at least for AS perl).

diff --git a/Makefile.PL b/Makefile.PL
index dd01441091686f6ab68048df9a5e22dfcc69b7d9..b0c82a677aa408350064087cb7437da6f5daf592 100644 (file)
--- a/Makefile.PL
+++ b/Makefile.PL
@@ -4,7 +4,29 @@ use strict;
 use warnings;
 use ExtUtils::MakeMaker;
 
+use Config;
+
 my @DEFINES;
+my %macro;
+
+my $is_gcc_34 = 0;
+print "Checking if this is gcc 3.4 on Windows trying to link against an import library... ";
+if ($^O eq 'MSWin32' and not grep /^LD[A-Z]*=/, @ARGV) {
+ my ($libperl, $gccversion) = map $_ || '', @Config{qw<libperl gccversion>};
+ if ($gccversion =~ /^3\.4\.[0-9]+/ and $libperl =~ s/\.lib$//) {
+  $is_gcc_34 = 1;
+  my ($lddlflags, $ldflags) = @Config{qw<lddlflags ldflags>};
+  $_ ||= '', s/-L(?:".*?"|\S+)//g for $lddlflags, $ldflags;
+  $libperl = "-l$libperl";
+  my $libdirs = join ' ',
+                 map { s/(?<!\\)((?:\\\\)*")/\\$1/g; qq[-L"$_"] }
+                  @Config{qw<bin sitebin>};
+  $macro{LDDLFLAGS}    = "$lddlflags $libdirs $libperl";
+  $macro{LDFLAGS}      = "$ldflags $libdirs $libperl";
+  $macro{PERL_ARCHIVE} = '',
+ }
+}
+print $is_gcc_34 ? "yes\n" : "no\n";
 
 # Threads, Windows and 5.8.x don't seem to be best friends
 if ($^O eq 'MSWin32' and "$]" < 5.009) {
@@ -17,6 +39,7 @@ if ($^O eq 'MSWin32' and "$]" < 5.010_001) {
 }
 
 @DEFINES = (DEFINE => join ' ', @DEFINES) if @DEFINES;
+%macro   = (macro  => { %macro })         if %macro; # Beware of the circle
 
 my $dist = 'indirect';
 
@@ -31,6 +54,7 @@ my %PREREQ_PM = (
 );
 
 my %BUILD_REQUIRES =(
+ 'Config'              => 0,
  'ExtUtils::MakeMaker' => 0,
  'Test::More'          => 0,
  %PREREQ_PM,
@@ -38,6 +62,7 @@ my %BUILD_REQUIRES =(
 
 my %META = (
  configure_requires => {
+  'Config'              => 0,
   'ExtUtils::MakeMaker' => 0,
  },
  build_requires => {
@@ -71,4 +96,5 @@ WriteMakefile(
  clean            => {
   FILES => "$dist-* *.gcov *.gcda *.gcno cover_db Debian_CPANTS.txt*"
  },
+ %macro,
 );