X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=Makefile.PL;h=2f911012529d9ed674442811d83b61f822716a0f;hb=35b71bcad21c9fb3ab22636b260608c89542e48f;hp=935ad2b667e039a7167e94846b401755c027fd41;hpb=22631187be248553a4d82cf5f2c61e68293da74c;p=p5sagit%2FDevel-Size.git

diff --git a/Makefile.PL b/Makefile.PL
index 935ad2b..2f91101 100644
--- a/Makefile.PL
+++ b/Makefile.PL
@@ -1,9 +1,50 @@
+#!/usr/bin/perl -w
 use 5.008;
 use ExtUtils::MakeMaker;
+use strict;
+
+use Config;
+(unpack "B*", pack "N", $Config{ptrsize}) =~ /^0+1(0+)$/
+    or die "Your pointer size of $Config{ptrsize} is very confusing";
+my $ptr_bits = length $1;
+
+my $svh = "$Config{archlibexp}/CORE/perl.h";
+my $vtable_file = 'vtables.inc';
+
+my %vtables;
+open FH, "<$svh"
+    or die "Can't open $svh ($!) - is your perl install missing its headers?";
+while (<FH>) {
+    next unless /^\s+(PL_vtbl_[a-z]+),\s*$/ or /^EXT MGVTBL (PL_vtbl_[a-z]+) =/;
+    ++$vtables{$1};
+}
+warn "Didn't find any vtable names in $svh" unless %vtables;
+close FH;
+
+
+my %special = (
+	       PL_vtbl_collxfrm => 'USE_LOCALE_COLLATE',
+	       PL_vtbl_mutex => 'USE_5005THREADS',
+);
+
+open FH, ">$vtable_file" or die "Can't open $vtable_file: $!";
+foreach (sort keys %vtables) {
+    print FH "#ifdef $special{$_}\n" if ($special{$_});
+    if ($Config{gccversion}) {
+	print FH "    &$_,\n";
+    } else {
+	print FH "    check_new(st, &$_);\n";
+    }
+    print FH "#endif\n" if ($special{$_});
+}
+
+close FH or die "Error closing $vtable_file: $!";
 
 WriteMakefile(
-  NAME => 'Devel::Size',
-  VERSION_FROM => 'lib/Devel/Size.pm',
-  ($ExtUtils::MakeMaker::VERSION >= 6.47 ? (MIN_PERL_VERSION => '5.008') : ()),
-  ($ExtUtils::MakeMaker::VERSION >= 6.30 ? (LICENSE => 'perl') : ()),
+	      NAME => 'Devel::Size',
+	      VERSION_FROM => 'lib/Devel/Size.pm',
+	      DEFINE => "-DALIGN_BITS=$ptr_bits",
+	      (eval $ExtUtils::MakeMaker::VERSION >= 6.47 ? (MIN_PERL_VERSION => '5.008') : ()),
+	      (eval $ExtUtils::MakeMaker::VERSION >= 6.31 ? (LICENSE => 'perl') : ()),
+	      realclean => {FILES=> $vtable_file},
 );