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      1 #! /usr/bin/env perl
      2 # -*- mode: perl; -*-
      3 # Copyright 2016-2021 The OpenSSL Project Authors. All Rights Reserved.
      4 #
      5 # Licensed under the Apache License 2.0 (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             %{$shared_info{'gnu-shared'}},
     34             shared_defflag    => '-Wl,--version-script=',
     35             dso_ldflags       =>
     36                 (grep /(?:^|\s)-fsanitize/,
     37                  @{$config{CFLAGS}}, @{$config{cflags}})
     38                 ? ''
     39                 : '-Wl,-z,defs',
     40         };
     41     },
     42     'bsd-gcc-shared' => sub { return $shared_info{'linux-shared'}; },
     43     'darwin-shared' => {
     44         module_ldflags        => '-bundle',
     45         shared_ldflag         => '-dynamiclib -current_version $(SHLIB_VERSION_NUMBER) -compatibility_version $(SHLIB_VERSION_NUMBER)',
     46         shared_sonameflag     => '-install_name $(libdir)/',
     47     },
     48     'cygwin-shared' => {
     49         shared_ldflag         => '-shared -Wl,--enable-auto-image-base',
     50         shared_impflag        => '-Wl,--out-implib=',
     51     },
     52     'mingw-shared' => sub {
     53         return {
     54             %{$shared_info{'cygwin-shared'}},
     55             # def_flag made to empty string so it still generates
     56             # something
     57             shared_defflag    => '',
     58             shared_argfileflag => '@',
     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     'solaris-gcc-shared' => sub {
     83         return $shared_info{'linux-shared'} if detect_gnu_ld();
     84         return {
     85             # Note: we should also have -shared here, but because some
     86             # config targets define it with an added -static-libgcc
     87             # following it, we don't want to change the order.  This
     88             # forces all solaris gcc config targets to define shared_ldflag
     89             shared_ldflag     => '-Wl,-Bsymbolic',
     90             shared_defflag    => "-Wl,-M,",
     91             shared_sonameflag => "-Wl,-h,",
     92         };
     93     },
     94 );
     95