1package ExtUtils::HasCompiler;
2$ExtUtils::HasCompiler::VERSION = '0.014';
3use strict;
4use warnings;
5
6use base 'Exporter';
7our @EXPORT_OK = qw/can_compile_loadable_object/;
8our %EXPORT_TAGS = (all => \@EXPORT_OK);
9
10use Config;
11use Carp 'carp';
12use File::Basename 'basename';
13use File::Spec::Functions qw/catfile catdir rel2abs/;
14use File::Temp qw/tempdir tempfile/;
15
16my $tempdir = tempdir('HASCOMPILERXXXX', CLEANUP => 1, DIR => '.');
17
18my $loadable_object_format = <<'END';
19#define PERL_NO_GET_CONTEXT
20#include "EXTERN.h"
21#include "perl.h"
22#include "XSUB.h"
23
24#ifndef PERL_UNUSED_VAR
25#define PERL_UNUSED_VAR(var)
26#endif
27
28XS(exported) {
29#ifdef dVAR
30	dVAR;
31#endif
32	dXSARGS;
33
34	PERL_UNUSED_VAR(cv); /* -W */
35	PERL_UNUSED_VAR(items); /* -W */
36
37	XSRETURN_IV(42);
38}
39
40#ifndef XS_EXTERNAL
41#define XS_EXTERNAL(foo) XS(foo)
42#endif
43
44/* we don't want to mess with .def files on mingw */
45#if defined(WIN32) && defined(__GNUC__)
46#  define EXPORT __declspec(dllexport)
47#else
48#  define EXPORT
49#endif
50
51EXPORT XS_EXTERNAL(boot_%s) {
52#ifdef dVAR
53	dVAR;
54#endif
55	dXSARGS;
56
57	PERL_UNUSED_VAR(cv); /* -W */
58	PERL_UNUSED_VAR(items); /* -W */
59
60	newXS("%s::exported", exported, __FILE__);
61}
62
63END
64
65my $counter = 1;
66my %prelinking = map { $_ => 1 } qw/MSWin32 VMS aix/;
67
68sub can_compile_loadable_object {
69	my %args = @_;
70
71	my $output = $args{output} || \*STDOUT;
72
73	my $config = $args{config} || 'ExtUtils::HasCompiler::Config';
74	return if not $config->get('usedl');
75
76	my ($source_handle, $source_name) = tempfile('TESTXXXX', DIR => $tempdir, SUFFIX => '.c', UNLINK => 1);
77	my $basename = basename($source_name, '.c');
78
79	my $shortname = '_Loadable' . $counter++;
80	my $package = "ExtUtils::HasCompiler::$shortname";
81	printf $source_handle $loadable_object_format, $basename, $package or do { carp "Couldn't write to $source_name: $!"; return };
82	close $source_handle or do { carp "Couldn't close $source_name: $!"; return };
83
84	my $abs_basename = catfile($tempdir, $basename);
85	my $object_file = $abs_basename . $config->get('_o');
86	my $loadable_object = $abs_basename . '.' . $config->get('dlext');
87	my $incdir = catdir($config->get('archlibexp'), 'CORE');
88
89	my ($cc, $ccflags, $optimize, $cccdlflags, $ld, $ldflags, $lddlflags, $libperl, $perllibs) = map { $config->get($_) } qw/cc ccflags optimize cccdlflags ld ldflags lddlflags libperl perllibs/;
90
91	if ($prelinking{$^O}) {
92		require ExtUtils::Mksymlists;
93		ExtUtils::Mksymlists::Mksymlists(NAME => $basename, FILE => $abs_basename, IMPORTS => {});
94	}
95	my @commands;
96	if ($^O eq 'MSWin32' && $cc =~ /^cl/) {
97		push @commands, qq{$cc $ccflags $cccdlflags $optimize /I "$incdir" /c $source_name /Fo$object_file};
98		push @commands, qq{$ld $object_file $lddlflags $libperl $perllibs /out:$loadable_object /def:$abs_basename.def /pdb:$abs_basename.pdb};
99	}
100	elsif ($^O eq 'VMS') {
101		# Mksymlists is only the beginning of the story.
102		open my $opt_fh, '>>', "$abs_basename.opt" or do { carp "Couldn't append to '$abs_basename.opt'"; return };
103		print $opt_fh "PerlShr/Share\n";
104		close $opt_fh;
105
106		my $incdirs = $ccflags =~ s{ /inc[^=]+ (?:=)+ (?:\()? ( [^\/\)]* ) }{}xi ? "$1,$incdir" : $incdir;
107		push @commands, qq{$cc $ccflags $optimize /include=($incdirs) $cccdlflags $source_name /obj=$object_file};
108		push @commands, qq{$ld $ldflags $lddlflags=$loadable_object $object_file,$abs_basename.opt/OPTIONS,${incdir}perlshr_attr.opt/OPTIONS' $perllibs};
109	}
110	else {
111		my @extra;
112		if ($^O eq 'MSWin32') {
113			my $lib = '-l' . ($libperl =~ /lib([^.]+)\./)[0];
114			push @extra, "$abs_basename.def", $lib, $perllibs;
115		}
116		elsif ($^O eq 'cygwin') {
117			push @extra, catfile($incdir, $config->get('useshrplib') ? 'libperl.dll.a' : 'libperl.a');
118		}
119		elsif ($^O eq 'aix') {
120			$lddlflags =~ s/\Q$(BASEEXT)\E/$abs_basename/;
121			$lddlflags =~ s/\Q$(PERL_INC)\E/$incdir/;
122		}
123		elsif ($^O eq 'android') {
124			push @extra, qq{"-L$incdir"}, '-lperl', $perllibs;
125		}
126		push @commands, qq{$cc $ccflags $optimize "-I$incdir" $cccdlflags -c $source_name -o $object_file};
127		push @commands, qq{$cc $optimize $object_file -o $loadable_object $lddlflags @extra};
128	}
129
130	for my $command (@commands) {
131		print $output "$command\n" if not $args{quiet};
132		system $command and do { carp "Couldn't execute $command: $!"; return };
133	}
134
135	# Skip loading when cross-compiling
136	return 1 if exists $args{skip_load} ? $args{skip_load} : $config->get('usecrosscompile');
137
138	require DynaLoader;
139	local @DynaLoader::dl_require_symbols = "boot_$basename";
140	my $handle = DynaLoader::dl_load_file(rel2abs($loadable_object), 0);
141	if ($handle) {
142		my $symbol = DynaLoader::dl_find_symbol($handle, "boot_$basename") or do { carp "Couldn't find boot symbol for $basename"; return };
143		my $compilet = DynaLoader::dl_install_xsub('__ANON__::__ANON__', $symbol, $source_name);
144		my $ret = eval { $compilet->(); $package->exported } or carp $@;
145		delete $ExtUtils::HasCompiler::{"$shortname\::"};
146		eval { DynaLoader::dl_unload_file($handle) } or carp $@;
147		return defined $ret && $ret == 42;
148	}
149	else {
150		carp "Couldn't load $loadable_object: " . DynaLoader::dl_error();
151		return;
152	}
153}
154
155sub ExtUtils::HasCompiler::Config::get {
156	my (undef, $key) = @_;
157	return $ENV{uc $key} || $Config{$key};
158}
159
1601;
161