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      1 #! /usr/bin/env perl
      2 # -*- mode: perl; -*-
      3 # Copyright 2016-2023 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 $shared_info{'linux-shared'}; },
     43     'bsd-gcc-nodef-shared' => sub { 
     44         return {
     45             %{$shared_info{'gnu-shared'}},
     46             shared_defflags     => '-Wl,--version-script=',
     47         };
     48     },
     49     'darwin-shared' => {
     50         module_ldflags        => '-bundle',
     51         shared_ldflag         => '-dynamiclib -current_version $(SHLIB_VERSION_NUMBER) -compatibility_version $(SHLIB_VERSION_NUMBER)',
     52         shared_sonameflag     => '-install_name $(libdir)/',
     53     },
     54     'cygwin-shared' => {
     55         shared_ldflag         => '-shared -Wl,--enable-auto-image-base',
     56         shared_impflag        => '-Wl,--out-implib=',
     57     },
     58     'mingw-shared' => sub {
     59         return {
     60             %{$shared_info{'cygwin-shared'}},
     61             # def_flag made to empty string so it still generates
     62             # something
     63             shared_defflag    => '',
     64             shared_argfileflag => '@',
     65         };
     66     },
     67     'alpha-osf1-shared' => sub {
     68         return $shared_info{'gnu-shared'} if detect_gnu_ld();
     69         return {
     70             module_ldflags    => '-shared -Wl,-Bsymbolic',
     71             shared_ldflag     => '-shared -Wl,-Bsymbolic -set_version $(SHLIB_VERSION_NUMBER)',
     72         };
     73     },
     74     'svr3-shared' => sub {
     75         return $shared_info{'gnu-shared'} if detect_gnu_ld();
     76         return {
     77             shared_ldflag     => '-G',
     78             shared_sonameflag => '-h ',
     79         };
     80     },
     81     'svr5-shared' => sub {
     82         return $shared_info{'gnu-shared'} if detect_gnu_ld();
     83         return {
     84             shared_ldflag     => detect_gnu_cc() ? '-shared' : '-G',
     85             shared_sonameflag => '-h ',
     86         };
     87     },
     88     'solaris-gcc-shared' => sub {
     89         return $shared_info{'linux-shared'} if detect_gnu_ld();
     90         return {
     91             # Note: we should also have -shared here, but because some
     92             # config targets define it with an added -static-libgcc
     93             # following it, we don't want to change the order.  This
     94             # forces all solaris gcc config targets to define shared_ldflag
     95             shared_ldflag     => '-Wl,-Bsymbolic',
     96             shared_defflag    => "-Wl,-M,",
     97             shared_sonameflag => "-Wl,-h,",
     98         };
     99     },
    100 );
    101