1package ExtUtils::HasCompiler; 2$ExtUtils::HasCompiler::VERSION = '0.021'; 3use strict; 4use warnings; 5 6use base 'Exporter'; 7our @EXPORT_OK = qw/can_compile_loadable_object can_compile_static_library can_compile_extension/; 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 my $abs_basename = catfile($tempdir, $basename); 79 80 my ($cc, $ccflags, $optimize, $cccdlflags, $ld, $ldflags, $lddlflags, $libperl, $perllibs, $archlibexp, $_o, $dlext) = map { $config->get($_) } qw/cc ccflags optimize cccdlflags ld ldflags lddlflags libperl perllibs archlibexp _o dlext/; 81 82 my $incdir = catdir($archlibexp, 'CORE'); 83 my $object_file = $abs_basename.$_o; 84 my $loadable_object = "$abs_basename.$dlext"; 85 86 my @commands; 87 if ($^O eq 'MSWin32' && $cc =~ /^cl/) { 88 push @commands, qq{$cc $ccflags $cccdlflags $optimize /I "$incdir" /c $source_name /Fo$object_file}; 89 push @commands, qq{$ld $object_file $lddlflags $libperl $perllibs /out:$loadable_object /def:$abs_basename.def /pdb:$abs_basename.pdb}; 90 } 91 elsif ($^O eq 'VMS') { 92 # Mksymlists is only the beginning of the story. 93 open my $opt_fh, '>>', "$abs_basename.opt" or do { carp "Couldn't append to '$abs_basename.opt'"; return }; 94 print $opt_fh "PerlShr/Share\n"; 95 close $opt_fh; 96 97 my $incdirs = $ccflags =~ s{ /inc[^=]+ (?:=)+ (?:\()? ( [^\/\)]* ) }{}xi ? "$1,$incdir" : $incdir; 98 push @commands, qq{$cc $ccflags $optimize /include=($incdirs) $cccdlflags $source_name /obj=$object_file}; 99 push @commands, qq{$ld $ldflags $lddlflags=$loadable_object $object_file,$abs_basename.opt/OPTIONS,${incdir}perlshr_attr.opt/OPTIONS' $perllibs}; 100 } 101 else { 102 my @extra; 103 if ($^O eq 'MSWin32') { 104 my $lib = '-l' . ($libperl =~ /lib([^.]+)\./)[0]; 105 push @extra, "$abs_basename.def", $lib, $perllibs; 106 } 107 elsif ($^O eq 'cygwin') { 108 push @extra, catfile($incdir, $config->get('useshrplib') ? 'libperl.dll.a' : 'libperl.a'); 109 } 110 elsif ($^O eq 'aix') { 111 $lddlflags =~ s/\Q$(BASEEXT)\E/$abs_basename/; 112 $lddlflags =~ s/\Q$(PERL_INC)\E/$incdir/; 113 } 114 elsif ($^O eq 'android') { 115 push @extra, qq{"-L$incdir"}, '-lperl', $perllibs; 116 } 117 push @commands, qq{$cc $ccflags $optimize "-I$incdir" $cccdlflags -c $source_name -o $object_file}; 118 push @commands, qq{$ld $object_file -o $loadable_object $lddlflags @extra}; 119 } 120 121 if ($prelinking{$^O}) { 122 require ExtUtils::Mksymlists; 123 ExtUtils::Mksymlists::Mksymlists(NAME => $basename, FILE => $abs_basename, IMPORTS => {}); 124 } 125 126 my $shortname = '_Loadable' . $counter++; 127 my $package = "ExtUtils::HasCompiler::$shortname"; 128 printf $source_handle $loadable_object_format, $basename, $package or do { carp "Couldn't write to $source_name: $!"; return }; 129 close $source_handle or do { carp "Couldn't close $source_name: $!"; return }; 130 131 for my $command (@commands) { 132 print $output "$command\n" if not $args{quiet}; 133 system $command and do { carp "Couldn't execute $command: $!"; return }; 134 } 135 136 # Skip loading when cross-compiling 137 return 1 if exists $args{skip_load} ? $args{skip_load} : $config->get('usecrosscompile'); 138 139 require DynaLoader; 140 local @DynaLoader::dl_require_symbols = "boot_$basename"; 141 my $handle = DynaLoader::dl_load_file(rel2abs($loadable_object), 0); 142 if ($handle) { 143 my $symbol = DynaLoader::dl_find_symbol($handle, "boot_$basename") or do { carp "Couldn't find boot symbol for $basename"; return }; 144 my $compilet = DynaLoader::dl_install_xsub('__ANON__::__ANON__', $symbol, $source_name); 145 my $ret = eval { $compilet->(); $package->exported } or carp $@; 146 delete $ExtUtils::HasCompiler::{"$shortname\::"}; 147 eval { DynaLoader::dl_unload_file($handle) } or carp $@; 148 return defined $ret && $ret == 42; 149 } 150 else { 151 carp "Couldn't load $loadable_object: " . DynaLoader::dl_error(); 152 return; 153 } 154} 155 156my %static_unsupported_on = map { $_ => 1 } qw/VMS aix MSWin32 cygwin/; 157sub can_compile_static_library { 158 my %args = @_; 159 160 my $output = $args{output} || \*STDOUT; 161 162 my $config = $args{config} || 'ExtUtils::HasCompiler::Config'; 163 return if $config->get('useshrplib') eq 'true'; 164 165 my ($source_handle, $source_name) = tempfile('TESTXXXX', DIR => $tempdir, SUFFIX => '.c', UNLINK => 1); 166 my $basename = basename($source_name, '.c'); 167 my $abs_basename = catfile($tempdir, $basename); 168 169 my ($cc, $ccflags, $optimize, $ar, $full_ar, $ranlib, $archlibexp, $_o, $lib_ext) = map { $config->get($_) } qw/cc ccflags optimize ar full_ar ranlib archlibexp _o lib_ext/; 170 my $incdir = catdir($archlibexp, 'CORE'); 171 my $object_file = "$abs_basename$_o"; 172 my $static_library = $abs_basename.$lib_ext; 173 174 my @commands; 175 if ($static_unsupported_on{$^O}) { 176 return; 177 } 178 else { 179 my $my_ar = length $full_ar ? $full_ar : $ar; 180 push @commands, qq{$cc $ccflags $optimize "-I$incdir" -c $source_name -o $object_file}; 181 push @commands, qq{$my_ar cr $static_library $object_file}; 182 push @commands, qq{$ranlib $static_library} if $ranlib ne ':'; 183 } 184 185 my $shortname = '_Loadable' . $counter++; 186 my $package = "ExtUtils::HasCompiler::$shortname"; 187 printf $source_handle $loadable_object_format, $basename, $package or do { carp "Couldn't write to $source_name: $!"; return }; 188 close $source_handle or do { carp "Couldn't close $source_name: $!"; return }; 189 190 for my $command (@commands) { 191 print $output "$command\n" if not $args{quiet}; 192 system $command and do { carp "Couldn't execute $command: $!"; return }; 193 } 194 return 1; 195} 196 197sub can_compile_extension { 198 my %args = @_; 199 $args{config} ||= 'ExtUtils::HasCompiler::Config'; 200 my $linktype = $args{linktype} || ($args{config}->get('usedl') ? 'dynamic' : 'static'); 201 return $linktype eq 'static' ? can_compile_static_library(%args) : can_compile_loadable_object(%args); 202} 203 204sub ExtUtils::HasCompiler::Config::get { 205 my (undef, $key) = @_; 206 return $ENV{uc $key} || $Config{$key}; 207} 208 2091; 210 211# ABSTRACT: Check for the presence of a compiler 212 213__END__ 214 215=pod 216 217=encoding UTF-8 218 219=head1 NAME 220 221ExtUtils::HasCompiler - Check for the presence of a compiler 222 223=head1 VERSION 224 225version 0.021 226 227=head1 SYNOPSIS 228 229 use ExtUtils::HasCompiler 'can_compile_extension'; 230 if (can_compile_extension()) { 231 ... 232 } 233 else { 234 ... 235 } 236 237=head1 DESCRIPTION 238 239This module tries to check if the current system is capable of compiling, linking and loading an XS module. 240 241B<Notice>: this is an early release, interface stability isn't guaranteed yet. 242 243=head1 FUNCTIONS 244 245=head2 can_compile_loadable_object(%opts) 246 247This checks if the system can compile, link and load a perl loadable object. It may take the following options: 248 249=over 4 250 251=item * quiet 252 253Do not output the executed compilation commands. 254 255=item * config 256 257An L<ExtUtils::Config|ExtUtils::Config> (compatible) object for configuration. 258 259=item * skip_load 260 261This causes can_compile_loadable_object to not try to load the generated object. This defaults to true on a cross-compiling perl. 262 263=back 264 265=head2 can_compile_static_library(%opts) 266 267This checks if the system can compile and link a perl static library. It does not check it it can compile a new perl with it. It may take the following options: 268 269=over 4 270 271=item * quiet 272 273Do not output the executed compilation commands. 274 275=item * config 276 277An L<ExtUtils::Config|ExtUtils::Config> (compatible) object for configuration. 278 279=back 280 281=head2 can_compile_extension(%opts) 282 283This will call either C<can_compile_loadable_object>, or C<can_compile_static_library>, depending on which is the default on your configuration. In addition to the arguments listed above, it can take one more optional argument: 284 285=over 4 286 287=item * linktype 288 289This will force the linktype to be either static or dynamic. Dynamic compilation on a static perl won't work, but static libraries can be viable on a dynamic perl. 290 291=back 292 293=head1 AUTHOR 294 295Leon Timmermans <leont@cpan.org> 296 297=head1 COPYRIGHT AND LICENSE 298 299This software is copyright (c) 2014 by Leon Timmermans. 300 301This is free software; you can redistribute it and/or modify it under 302the same terms as the Perl 5 programming language system itself. 303 304=cut 305