1#! /usr/bin/env perl
2# -*- mode: perl; -*-
3# Copyright 2016-2018 The OpenSSL Project Authors. All Rights Reserved.
4#
5# Licensed under the OpenSSL license (the "License").  You may not use
6# this file except in compliance with the License.  You can obtain a copy
7# in the file LICENSE in the source distribution or at
8# https://www.openssl.org/source/license.html
9
10# This is a collection of extra attributes to be used as input for creating
11# shared libraries, currently on any Unix variant, including Unix like
12# environments on Windows.
13
14sub detect_gnu_ld {
15    my @lines =
16        `$config{CROSS_COMPILE}$config{CC} -Wl,-V /dev/null 2>&1`;
17    return grep /^GNU ld/, @lines;
18}
19sub detect_gnu_cc {
20    my @lines =
21        `$config{CROSS_COMPILE}$config{CC} -v 2>&1`;
22    return grep /gcc/, @lines;
23}
24
25my %shared_info;
26%shared_info = (
27    'gnu-shared' => {
28        shared_ldflag         => '-shared -Wl,-Bsymbolic',
29        shared_sonameflag     => '-Wl,-soname=',
30    },
31    'linux-shared' => sub {
32        return {
33            %{$shared_info{'gnu-shared'}},
34            shared_defflag    => '-Wl,--version-script=',
35        };
36    },
37    'bsd-gcc-shared' => sub { return $shared_info{'linux-shared'}; },
38    'bsd-shared' => sub {
39        return $shared_info{'gnu-shared'} if detect_gnu_ld();
40        return {
41            shared_ldflag     => '-shared -nostdlib',
42        };
43    },
44    'darwin-shared' => {
45        module_ldflags        => '-bundle',
46        shared_ldflag         => '-dynamiclib -current_version $(SHLIB_VERSION_NUMBER) -compatibility_version $(SHLIB_VERSION_NUMBER)',
47        shared_sonameflag     => '-install_name $(INSTALLTOP)/$(LIBDIR)/',
48    },
49    'cygwin-shared' => {
50        shared_ldflag         => '-shared -Wl,--enable-auto-image-base',
51        shared_impflag        => '-Wl,--out-implib=',
52    },
53    'mingw-shared' => sub {
54        return {
55            %{$shared_info{'cygwin-shared'}},
56            # def_flag made to empty string so  it still generates
57            # something
58            shared_defflag    => '',
59        };
60    },
61    'alpha-osf1-shared' => sub {
62        return $shared_info{'gnu-shared'} if detect_gnu_ld();
63        return {
64            module_ldflags    => '-shared -Wl,-Bsymbolic',
65            shared_ldflag     => '-shared -Wl,-Bsymbolic -set_version $(SHLIB_VERSION_NUMBER)',
66        };
67    },
68    'svr3-shared' => sub {
69        return $shared_info{'gnu-shared'} if detect_gnu_ld();
70        return {
71            shared_ldflag     => '-G',
72            shared_sonameflag => '-h ',
73        };
74    },
75    'svr5-shared' => sub {
76        return $shared_info{'gnu-shared'} if detect_gnu_ld();
77        return {
78            shared_ldflag     => detect_gnu_cc() ? '-shared' : '-G',
79            shared_sonameflag => '-h ',
80        };
81    },
82);
83