#! /usr/bin/env perl

# -*- mode: perl; -*-

# Copyright 2016-2018 The OpenSSL Project Authors. All Rights Reserved.

#

# Licensed under the OpenSSL license (the "License").  You may not use

# this file except in compliance with the License.  You can obtain a copy

# in the file LICENSE in the source distribution or at

# https://www.openssl.org/source/license.html

# This is a collection of extra attributes to be used as input for creating

# shared libraries, currently on any Unix variant, including Unix like

# environments on Windows.

sub detect_gnu_ld {

    my @lines =

        `$config{CROSS_COMPILE}$config{CC} -Wl,-V /dev/null 2>&1;;

    return grep /^GNU ld/, @lines;

}

sub detect_gnu_cc {

    my @lines =

        `$config{CROSS_COMPILE}$config{CC} -v 2>&1;;

    return grep /gcc/, @lines;

}

my %shared_info;

%shared_info = (

    'gnu-shared' => {

        shared_ldflag         => '-shared -Wl,-Bsymbolic',

        shared_sonameflag     => '-Wl,-soname=',

    },

    'linux-shared' => sub {

        return {

            %{$shared_info{'gnu-shared'}},

            shared_defflag    => '-Wl,--version-script=',

        };

    },

    'bsd-gcc-shared' => sub { return $shared_info{'linux-shared'}; },

    'bsd-shared' => sub {

        return $shared_info{'gnu-shared'} if detect_gnu_ld();

        return {

            shared_ldflag     => '-shared -nostdlib',

        };

    },

    'darwin-shared' => {

        module_ldflags        => '-bundle',

        shared_ldflag         => '-dynamiclib -current_version $(SHLIB_VERSION_NUMBER) -compatibility_version $(SHLIB_VERSION_NUMBER)',

        shared_sonameflag     => '-install_name $(INSTALLTOP)/$(LIBDIR)/',

    },

    'cygwin-shared' => {

        shared_ldflag         => '-shared -Wl,--enable-auto-image-base',

        shared_impflag        => '-Wl,--out-implib=',

    },

    'mingw-shared' => sub {

        return {

            %{$shared_info{'cygwin-shared'}},

            # def_flag made to empty string so  it still generates

            # something

            shared_defflag    => '',

        };

    },

    'alpha-osf1-shared' => sub {

        return $shared_info{'gnu-shared'} if detect_gnu_ld();

        return {

            module_ldflags    => '-shared -Wl,-Bsymbolic',

            shared_ldflag     => '-shared -Wl,-Bsymbolic -set_version $(SHLIB_VERSION_NUMBER)',

        };

    },

    'svr3-shared' => sub {

        return $shared_info{'gnu-shared'} if detect_gnu_ld();

        return {

            shared_ldflag     => '-G',

            shared_sonameflag => '-h ',

        };

    },

    'svr5-shared' => sub {

        return $shared_info{'gnu-shared'} if detect_gnu_ld();

        return {

            shared_ldflag     => detect_gnu_cc() ? '-shared' : '-G',

            shared_sonameflag => '-h ',

        };

    },

);