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package My::Utility;
use strict;
use warnings;
use base qw(Exporter);

our @EXPORT_OK = qw(check_config_script check_prebuilt_binaries check_prereqs_libs check_prereqs_tools find_SDL2_dir find_file check_header
                    sed_inplace get_dlext $inc_lib_candidates $source_packs);
use Config;
use ExtUtils::CBuilder;
use File::Spec::Functions qw(splitdir catdir splitpath catpath rel2abs);
use File::Find qw(find);
use File::Which;
use File::Copy qw(cp);
use Cwd qw(realpath);

our $cc                 = $Config{cc};
our $inc_lib_candidates = {
  '/usr/local/include'       => '/usr/local/lib',
  '/usr/include'             => '/usr/lib',
  '/usr/X11R6/include'       => '/usr/X11R6/lib',
  '/usr/local/include/smpeg' => '/usr/local/lib',
};
$inc_lib_candidates->{'/usr/pkg/include/smpeg'} = '/usr/local/lib'            if -f '/usr/pkg/include/smpeg/smpeg.h';
$inc_lib_candidates->{'/usr/include/smpeg'}     = '/usr/lib'                  if -f '/usr/include/smpeg/smpeg.h';
$inc_lib_candidates->{'/usr/X11R6/include'}     = '/usr/X11R6/lib'            if -f '/usr/X11R6/include/GL/gl.h';
$inc_lib_candidates->{'/usr/X11R7/include'}     = '/usr/X11R7/lib'            if -f '/usr/X11R7/include/GL/gl.h';
$inc_lib_candidates->{'/usr/X11R7/include'}     = '/usr/X11R7/lib'            if -f '/usr/X11R7/include/freetype2/freetype/freetype.h';
$inc_lib_candidates->{'/usr/X11R7/include'}     = '/usr/X11R7/lib'            if -f '/usr/X11R7/include/fontconfig/fontconfig.h';
$inc_lib_candidates->{'/usr/include/ogg'}       = '/usr/lib/x86_64-linux-gnu' if -f '/usr/lib/x86_64-linux-gnu/libogg.so';
$inc_lib_candidates->{'/usr/include/vorbis'}    = '/usr/lib/x86_64-linux-gnu' if -f '/usr/lib/x86_64-linux-gnu/libvorbis.so';
$inc_lib_candidates->{'/usr/include'}           = '/usr/lib64'                if -e '/usr/lib64' && $Config{'myarchname'} =~ /64/;
$inc_lib_candidates->{'/usr/include'}           = ['/usr/lib64', '/usr/lib']  if -e '/usr/lib64' && -e '/usr/lib' && $Config{'myarchname'} =~ /64/;

$inc_lib_candidates->{$ENV{SDL2_INC}}           = $ENV{SDL2_LIB}              if exists $ENV{SDL2_LIB} && exists $ENV{SDL2_INC};

#### packs with prebuilt binaries
# the order matters, we offer binaries to user in the same order (1st = preffered)
my $prebuilt_binaries = [
    {
      title    => "Binaries Win/32bit SDL2 (20130305) RECOMMENDED\n" .
                  "\t(gfx, image, mixer, net, smpeg, ttf)",
      url      => [
        'http://strawberryperl.com/package/kmx/sdl/32bit_SDL2_20130305.zip',
      ],
      sha1sum  => 'e77e5f04339d60871e9b79f66ac1bca4996648a7',
      match    => sub { $Config{archname} =~ /^MSWin32-x86-/ && $Config{cc} =~ /gcc/ },
    },
    {
      title    => "Binaries Win/64bit SDL2 (20130305) RECOMMENDED\n" .
                  "\t(gfx, image, mixer, net, smpeg, ttf)",
      url      => [
        'http://strawberryperl.com/package/kmx/sdl/64bit_SDL2_20130305.zip',
      ],
      sha1sum  => 'f4d9b5e933029571ebbc1e323f504300da7988bc',
      match    => sub { $Config{archname} =~ /^MSWin32-x64-/ && $Config{cc} =~ /gcc/ },
    },
 ];

#### tarballs with source codes
our $source_packs = [
  {
    title   => "Source code build\n    ",
    members => [
      {
        pack => 'z',
        version => '1.2.8',
        dirname => 'zlib-1.2.8',
        url => [
          'http://zlib.net/zlib-1.2.8.tar.gz'
        ],
        sha1sum  => 'a4d316c404ff54ca545ea71a27af7dbc29817088',
        patches => [],
        prereq_libs => [],
      },
      {
        pack => 'jpeg',
        version => '9',
        dirname => 'jpeg-9',
        url => [
          'http://www.ijg.org/files/jpegsrc.v9.tar.gz'
        ],
        sha1sum  => '724987e7690ca3d74d6ab7c1f1b6854e88ca204b',
        patches => [],
        prereq_libs => [],
      },
      {
        pack => 'tiff',
        version => '4.0.3',