1 files changed, 154 insertions, 0 deletions
diff --git a/inc/Module/Install/Can.pm b/inc/Module/Install/Can.pm
new file mode 100644
index 0000000..22167b8
--- /dev/null
+++ b/inc/Module/Install/Can.pm
@@ -0,0 +1,154 @@
+#line 1
+package Module::Install::Can;
+
+use strict;
+use Config                ();
+use ExtUtils::MakeMaker   ();
+use Module::Install::Base ();
+
+use vars qw{$VERSION @ISA $ISCORE};
+BEGIN {
+	$VERSION = '1.06';
+	@ISA     = 'Module::Install::Base';
+	$ISCORE  = 1;
+}
+
+# check if we can load some module
+### Upgrade this to not have to load the module if possible
+sub can_use {
+	my ($self, $mod, $ver) = @_;
+	$mod =~ s{::|\\}{/}g;
+	$mod .= '.pm' unless $mod =~ /\.pm$/i;
+
+	my $pkg = $mod;
+	$pkg =~ s{/}{::}g;
+	$pkg =~ s{\.pm$}{}i;
+
+	local $@;
+	eval { require $mod; $pkg->VERSION($ver || 0); 1 };
+}
+
+# Check if we can run some command
+sub can_run {
+	my ($self, $cmd) = @_;
+
+	my $_cmd = $cmd;
+	return $_cmd if (-x $_cmd or $_cmd = MM->maybe_command($_cmd));
+
+	for my $dir ((split /$Config::Config{path_sep}/, $ENV{PATH}), '.') {
+		next if $dir eq '';
+		require File::Spec;
+		my $abs = File::Spec->catfile($dir, $cmd);
+		return $abs if (-x $abs or $abs = MM->maybe_command($abs));
+	}
+
+	return;
+}
+
+# Can our C compiler environment build XS files
+sub can_xs {
+	my $self = shift;
+
+	# Ensure we have the CBuilder module
+	$self->configure_requires( 'ExtUtils::CBuilder' => 0.27 );
+
+	# Do we have the configure_requires checker?
+	local $@;
+	eval "require ExtUtils::CBuilder;";
+	if ( $@ ) {
+		# They don't obey configure_requires, so it is
+		# someone old and delicate. Try to avoid hurting
+		# them by falling back to an older simpler test.
+		return $self->can_cc();
+	}
+
+	# Do we have a working C compiler
+	my $builder = ExtUtils::CBuilder->new(
+		quiet => 1,
+	);
+	unless ( $builder->have_compiler ) {
+		# No working C compiler
+		return 0;
+	}
+
+	# Write a C file representative of what XS becomes
+	require File::Temp;
+	my ( $FH, $tmpfile ) = File::Temp::tempfile(
+		"compilexs-XXXXX",
+		SUFFIX => '.c',
+	);
+	binmode $FH;
+	print $FH <<'END_C';
+#include "EXTERN.h"
+#include "perl.h"
+#include "XSUB.h"
+
+int main(int argc, char **argv) {
+    return 0;
+}
+
+int boot_sanexs() {
+    return 1;
+}
+
+END_C
+	close $FH;
+
+	# Can the C compiler access the same headers XS does
+	my @libs   = ();
+	my $object = undef;
+	eval {
+		local $^W = 0;
+		$object = $builder->compile(
+			source => $tmpfile,
+		);
+		@libs = $builder->link(
+			objects     => $object,
+			module_name => 'sanexs',
+		);
+	};
+	my $result = $@ ? 0 : 1;
+
+	# Clean up all the build files
+	foreach ( $tmpfile, $object, @libs ) {
+		next unless defined $_;
+		1 while unlink;
+	}
+
+	return $result;
+}
+
+# Can we locate a (the) C compiler
+sub can_cc {
+	my $self   = shift;
+	my @chunks = split(/ /, $Config::Config{cc}) or return;
+
+	# $Config{cc} may contain args; try to find out the program part
+	while (@chunks) {
+		return $self->can_run("@chunks") || (pop(@chunks), next);
+	}
+
+	return;
+}
+
+# Fix Cygwin bug on maybe_command();
+if ( $^O eq 'cygwin' ) {
+	require ExtUtils::MM_Cygwin;
+	require ExtUtils::MM_Win32;
+	if ( ! defined(&ExtUtils::MM_Cygwin::maybe_command) ) {
+		*ExtUtils::MM_Cygwin::maybe_command = sub {
+			my ($self, $file) = @_;
+			if ($file =~ m{^/cygdrive/}i and ExtUtils::MM_Win32->can('maybe_command')) {
+				ExtUtils::MM_Win32->maybe_command($file);
+			} else {
+				ExtUtils::MM_Unix->maybe_command($file);
+			}
+		}
+	}
+}
+
+1;
+
+__END__
+
+#line 236