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      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 
     14 sub 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 }
     19 sub detect_gnu_cc {
     20     my @lines =
     21         `$config{CROSS_COMPILE}$config{CC} -v 2>&1`;
     22     return grep /gcc/, @lines;
     23 }
     24 
     25 my %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