1#line 1
2package Module::Install::Can;
3
4use strict;
5use Config                ();
6use File::Spec            ();
7use ExtUtils::MakeMaker   ();
8use Module::Install::Base ();
9
10use vars qw{$VERSION @ISA $ISCORE};
11BEGIN {
12	$VERSION = '0.91';
13	@ISA     = 'Module::Install::Base';
14	$ISCORE  = 1;
15}
16
17# check if we can load some module
18### Upgrade this to not have to load the module if possible
19sub can_use {
20	my ($self, $mod, $ver) = @_;
21	$mod =~ s{::|\\}{/}g;
22	$mod .= '.pm' unless $mod =~ /\.pm$/i;
23
24	my $pkg = $mod;
25	$pkg =~ s{/}{::}g;
26	$pkg =~ s{\.pm$}{}i;
27
28	local $@;
29	eval { require $mod; $pkg->VERSION($ver || 0); 1 };
30}
31
32# check if we can run some command
33sub can_run {
34	my ($self, $cmd) = @_;
35
36	my $_cmd = $cmd;
37	return $_cmd if (-x $_cmd or $_cmd = MM->maybe_command($_cmd));
38
39	for my $dir ((split /$Config::Config{path_sep}/, $ENV{PATH}), '.') {
40		next if $dir eq '';
41		my $abs = File::Spec->catfile($dir, $_[1]);
42		return $abs if (-x $abs or $abs = MM->maybe_command($abs));
43	}
44
45	return;
46}
47
48# can we locate a (the) C compiler
49sub can_cc {
50	my $self   = shift;
51	my @chunks = split(/ /, $Config::Config{cc}) or return;
52
53	# $Config{cc} may contain args; try to find out the program part
54	while (@chunks) {
55		return $self->can_run("@chunks") || (pop(@chunks), next);
56	}
57
58	return;
59}
60
61# Fix Cygwin bug on maybe_command();
62if ( $^O eq 'cygwin' ) {
63	require ExtUtils::MM_Cygwin;
64	require ExtUtils::MM_Win32;
65	if ( ! defined(&ExtUtils::MM_Cygwin::maybe_command) ) {
66		*ExtUtils::MM_Cygwin::maybe_command = sub {
67			my ($self, $file) = @_;
68			if ($file =~ m{^/cygdrive/}i and ExtUtils::MM_Win32->can('maybe_command')) {
69				ExtUtils::MM_Win32->maybe_command($file);
70			} else {
71				ExtUtils::MM_Unix->maybe_command($file);
72			}
73		}
74	}
75}
76
771;
78
79__END__
80
81#line 156
82