xref: /openbsd/gnu/usr.bin/perl/win32/FindExt.pm (revision 9f11ffb7) 
1package FindExt;
2
3our $VERSION = '1.03';
4
5use strict;
6use warnings;
7
8my $no = join('|',qw(Amiga.* GDBM_File ODBM_File NDBM_File DB_File
9                     VMS.* Sys-Syslog IPC-SysV));
10$no = qr/^(?:$no)$/i;
11
12sub apply_config {
13    my ($config) = @_;
14    my @no;
15
16    push @no, 'Sys-Syslog' if $^O eq 'MSWin32';
17
18    # duplicates logic from Configure (mostly)
19    push @no, "DB_File" unless $config->{i_db};
20    push @no, "GDBM_File" unless $config->{i_gdbm};
21    push @no, "IPC-SysV" unless $config->{d_msg} || $config->{d_sem} || $config->{d_shm};
22    push @no, "NDBM_File" unless $config->{d_ndbm};
23    push @no, "ODBM_File"
24      unless ($config->{i_dbm} || $config->{i_rpcsvcdbm}) && !$config->{d_cplusplus};
25    push @no, "Amiga.*" unless $^O eq "amigaos";
26    push @no, "VMS.*" unless $^O eq "VMS";
27    push @no, "Win32.*" unless $^O eq "MSWin32" || $^O eq "cygwin";
28
29    $no = join('|', @no);
30    $no = qr/^(?:$no)$/i;
31}
32
33my %ext;
34my %static;
35
36sub set_static_extensions {
37    # adjust results of scan_ext, and also save
38    # statics in case scan_ext hasn't been called yet.
39    # if '*' is passed then all XS extensions are static
40    # (with possible exclusions)
41    %static = ();
42    my @list = @_;
43    if (@_ and $_[0] eq '*') {
44	my %excl = map {$_=>1} map {m/^!(.*)$/} @_[1 .. $#_];
45	@list = grep {!exists $excl{$_}} keys %ext;
46    }
47    for (@list) {
48        $static{$_} = 1;
49        $ext{$_} = 'static' if $ext{$_} && $ext{$_} eq 'dynamic';
50    }
51
52    # Encode is a special case.  If we are building Encode as a static
53    # extension, we need to explicitly list its subextensions as well.
54    # For other nested extensions, this is handled automatically by
55    # the appropriate Makefile.PL.
56    if ($ext{Encode} && $ext{Encode} eq 'static') {
57        require File::Find;
58        File::Find::find({
59                          no_chdir => 1,
60                          wanted => sub {
61                              return unless m!\b(Encode/.+)/Makefile\.PL!;
62                              $static{$1} = 1;
63                              $ext{$1} = 'static';
64                          },
65                         }, "../cpan/Encode");
66    }
67}
68
69sub _ext_eq {
70    my $key = shift;
71    sub {
72        sort grep $ext{$_} eq $key, keys %ext;
73    }
74}
75
76*dynamic_ext = _ext_eq('dynamic');
77*static_ext = _ext_eq('static');
78*nonxs_ext = _ext_eq('nonxs');
79
80sub extensions {
81    sort grep $ext{$_} ne 'known', keys %ext;
82}
83
84sub known_extensions {
85    sort keys %ext;
86}
87
88sub is_static
89{
90 return $ext{$_[0]} eq 'static'
91}
92
93sub has_xs_or_c {
94    my $dir = shift;
95    opendir my $dh, $dir or die "opendir $dir: $!";
96    while (defined (my $item = readdir $dh)) {
97        return 1 if $item =~ /\.xs$/;
98        return 1 if $item =~ /\.c$/;
99    }
100    return 0;
101}
102
103# Function to find available extensions, ignoring DynaLoader
104sub scan_ext
105{
106    my $ext_dir = shift;
107    opendir my $dh, "$ext_dir";
108    while (defined (my $item = readdir $dh)) {
109        next if $item =~ /^\.\.?$/;
110        next if $item eq "DynaLoader";
111        next unless -d "$ext_dir/$item";
112        my $this_ext = $item;
113        my $leaf = $item;
114
115        $this_ext =~ s!-!/!g;
116        $leaf =~ s/.*-//;
117
118        # List/Util.xs lives in Scalar-List-Utils, Cwd.xs lives in PathTools
119        $this_ext = 'List/Util' if $this_ext eq 'Scalar/List/Utils';
120        $this_ext = 'Cwd'       if $this_ext eq 'PathTools';
121
122	# Temporary hack to cope with smokers that are not clearing directories:
123        next if $ext{$this_ext};
124
125        if (has_xs_or_c("$ext_dir/$item")) {
126            $ext{$this_ext} = $static{$this_ext} ? 'static' : 'dynamic';
127        } else {
128            $ext{$this_ext} = 'nonxs';
129        }
130        $ext{$this_ext} = 'known' if $item =~ $no;
131    }
132}
133
1341;
135# ex: set ts=8 sts=4 sw=4 et:
136