use ExtUtils::MakeMaker qw(prompt WriteMakefile);

require 5.6.0;

unless (@ARGV) {
warn <<END;
NOTICE: This module requires libgd 2.0.12 or higher.
        it will NOT work with earlier versions.
        See www.cpan.org for versions of GD that are compatible
        with earlier versions of libgd.

        If you are using Math::Trig 1.01 or lower, it has a bug that
        causes a "prerequisite not found" warning to be issued.  You may
        safely ignore this warning.

        Type perl Makefile.PL -h for command-line option summary

END
}


# =====> PATHS: CHECK AND ADJUST <=====
my (@INC,@LIBPATH,@LIBS);
my $AUTOCONFIG = 0;      # global set by try_to_autoconfigure() below

try_to_autoconfigure(\$options,\$lib_gd_path,\@INC,\@LIBPATH,\@LIBS);

@INC     = qw(-I/usr/include -I/usr/include/gd) unless @INC;
@LIBPATH = qw(-L/usr/lib/X11 -L/usr/X11R6/lib -L/usr/X11/lib -L/usr/lib) unless @LIBPATH;
@LIBS    = qw(-lgd -lpng -lz) unless @LIBS;

# support for AMD64 libraries
if (-d '/usr/lib64') {
  my @libs64 = map {my $a = $_; $a=~ s/lib$/lib64/; $a} @LIBPATH;
  @LIBPATH = (@LIBPATH,@libs64);
}

#############################################################################################
# Build options passed in to script to support reproducible builds via Makefiles
#############################################################################################
use Getopt::Long;
my $result = GetOptions("options=s"       => \$options,
			"lib_gd_path=s"   => \$lib_gd_path,
			"lib_ft_path=s"   => \$lib_ft_path,
			"lib_png_path=s"  => \$lib_png_path,
			"lib_jpeg_path=s" => \$lib_jpeg_path,
			"lib_xpm_path=s"  => \$lib_xpm_path,
			"lib_zlib_path=s" => \$lib_zlib_path,
		       );
unless ($result) {
  print STDERR <<END;
Usage: perl Makefile.PL [options]

Configure GD module.

 Options:
     -options       "JPEG,FT,XPM"   feature options, separated by commas
     -lib_gd_path   path            path to libgd
     -lib_ft_path   path            path to Freetype library
     -lib_png_path  path            path to libpng
     -lib_jpeg_path path            path to libjpeg
     -lib_xpm_path  path            path to libxpm
     -lib_zlib_path path            path to libpng

If no options are passed on the command line.  The program will
attempt to autoconfigure itself with the gdlib-config program (present
in GD versions 2.0.27 or later).  Otherwise it will prompt for these
values interactively.
END
}

if( defined($options) )
{
    print "Included Features:          $options\n";
}
if( defined($lib_gd_path) )
{
    print "GD library used from:       $lib_gd_path\n";   
}
if( defined($lib_ft_path) )
{
    print "FreeType library used from: $lib_ft_path\n";
    @INC     = ("-I$lib_ft_path/include", @INC);
    @LIBPATH = ("-L$lib_ft_path/lib", @LIBPATH);
}
if( defined($lib_png_path) )  
{
    print "PNG library used from:      $lib_png_path\n";
    @INC     = ("-I$lib_png_path/include", @INC);
    @LIBPATH = ("-L$lib_png_path/lib", @LIBPATH); 
}
if( defined($lib_jpeg_path) )  
{
    print "JPEG library used from:      $lib_jpeg_path\n";
    @INC     = ("-I$lib_jpeg_path/include", @INC);
    @LIBPATH = ("-L$lib_jpeg_path/lib", @LIBPATH); 
}
if( defined($lib_xpm_path) )  
{
    print "XPM library used from:      $lib_xpm_path\n";
    @INC     = ("-I$lib_xpm_path/include", @INC);
    @LIBPATH = ("-L$lib_xpm_path/lib", @LIBPATH); 
}
if( defined($lib_zlib_path) ) 
{
    print "Zlib library used from:     $lib_zlib_path\n";
    @INC     = ("-I$lib_zlib_path/include", @INC);
    @LIBPATH = ("-L$lib_zlib_path/lib", @LIBPATH); 
}
#############################################################################################

if ($^O eq 'VMS'){
  warn "This is a build on OpenVMS. In case of problems with the build\n";
  warn "do not bother Lincoln Stein but get in touch with\n";
  warn "Martin P.J. Zinser (zinser\@decus.de)\n\n";

  if ($ENV{"LIB_ROOT"} eq "") {
    warn "Define lib_root as a concealed logical pointing to the\n";
    warn "Top directory where you have your libraries installed\n";
    warn "E.g. define/job/trans=conc lib_root public\$device:[public.util.libs.]\n";
    warn "Also define the logical pubbin to point to the location\n";
    warn "of the object libraries\n";
    warn "Then re-invoke Makefile.PL\n";
    warn "Exiting now...\n";
    exit;
  }

  @INC     = qw(-I/lib_root/gd -I/lib_root/libpng -I/lib_root/zlib);
  @LIBPATH = qw(-Lpubbin);
  @LIBS    = qw(-llibgd.olb -llibpng.olb -llibz.olb);
}

###################################################################
# path to libgd, skip prompt if passed in from above
###################################################################
my $PREFIX = $lib_gd_path;
if( ! defined($lib_gd_path) )
{
  warn "\n";
  $PREFIX = prompt('Where is libgd installed?','/usr/lib');
}

unless ($AUTOCONFIG || $PREFIX eq '/usr/lib') {
  $PREFIX =~ s!/lib$!!;
  unshift @INC,"-I$PREFIX/include";
  unshift @LIBPATH,"-L$PREFIX/lib";
}

# FEATURE FLAGS

##################################################################################################################
# If build options have not been passed in then prompt for settings
##################################################################################################################
my ($JPEG, $FT, $XPM, $GIF) = (undef, undef, undef, undef);
if( defined($options) )
{
  $JPEG = $options =~ m/JPEG/i;
  $FT   = $options =~ m/FT|FREETYPE/i;
  $XPM  = $options =~ m/XPM/i;
  $GIF  = $options =~ m/GIF/i;
}
else
{
    warn "\nPlease choose the features that match how libgd was built:\n";
    $JPEG = lc prompt('Build JPEG support?','y') eq 'y';
    $FT   = lc prompt('Build FreeType support?','y') eq 'y';
    $XPM  = $^O !~ /^freebsd|MSWin32$/ && lc prompt('Build XPM support?','y') eq 'y';
}
##################################################################################################################

my $FCGI    = 0;   # set to 1 to build compatability with fastCGI

warn "\nIf you experience compile problems, please check the \@INC, \@LIBPATH and \@LIBS\n",
     "arrays defined in Makefile.PL and manually adjust, if necessary.\n\n";

#### no user-serviceable parts below #####

if (!$AUTOCONFIG) {
  push @LIBS,'-lfreetype' if $FT;
  push @LIBS,'-ljpeg'     if $JPEG;
  push @LIBS, '-lm'       unless $^O eq 'MSWin32';
  push @INC, '-I/lib_root/libjpeg' if ($JPEG && $^O eq 'VMS');
  push @INC, '-I/lib_root/ft2/include/freetype' if ($FT && $^O eq 'VMS');
  push @INC, '-I/X11' if ($XPM && $^O eq 'VMS');

  # FreeBSD 3.3 with libgd built from ports croaks if -lXpm is specified 
  if ($^O ne 'freebsd' && $^O ne 'MSWin32') { 
    push @LIBS,'-lX11','-lXpm' if $XPM; 
  }
}

my $CAPI = defined $ExtUtils::MakeMaker::CAPI_support;
my $DEFINES = '';
$DEFINES    .= ' -DHAVE_JPEG' if $JPEG;
$DEFINES    .= ' -DHAVE_FT'   if $FT;
$DEFINES    .= ' -DHAVE_XPM'  if $XPM;
$DEFINES    .= ' -DHAVE_GIF'  if $GIF;
$DEFINES    .= ' -DFCGI'      if $FCGI;

WriteMakefile(
    'NAME'	=> 'GD',
    'VERSION_FROM'	=> 'GD.pm',
    'PREREQ_PM' => {
		    'Math::Trig' => 0,
		    },
    'dist'      => {'COMPRESS'=>'gzip -9f', 'SUFFIX' => 'gz',
	            'ZIP'=>'/usr/bin/zip','ZIPFLAGS'=>'-rl'},
    'LIBS'      => [join(' ',$ENV{'GD_LIBS'},@LIBPATH,@LIBS)],
    'INC'       => join(' ',$ENV{'GD_INC'},@INC), 
    'AUTHOR'    => 'Lincoln Stein (lstein@cshl.org)',
    'ABSTRACT'  => 'Interface to Gd Graphics Library',
     $CAPI ? ('CAPI'      => 'TRUE') : (),
    'DEFINE'	=> $DEFINES,
);

sub try_to_autoconfigure {
  my ($options,$lib_gd_path,$INC,$LIBPATH,$LIBS) = @_;
  my $config = `gdlib-config --all`;
  return unless $config;
  $AUTOCONFIG++;

  my ($version) = $config =~ /^GD library\s+(\S+)/m;
  warn "Configuring for libgd version $version.\n";

  my ($cflags)   = $config =~ /^cflags:\s+(.+)/m;
  my ($ldflags)  = $config =~ /^ldflags:\s+(.+)/m;
  my ($libs)     = $config =~ /^libs:\s+(.+)/m;
  my ($libdir)   = $config =~ /^libdir:\s+(.+)/m;
  my ($features) = $config =~ /^features:\s+(.+)/m;

  @$INC          = map {s/^-I// && "-I$_"} split /\s+/,$cflags;
  @$LIBPATH      = map {s/^-L// && "-L$_"} split /\s+/,$ldflags;
  @$LIBS         = split /\s+/,$libs;

  push @$LIBS,"-lgd";
  push @$LIBPATH,"-L$libdir";
  ($$lib_gd_path = $libdir) =~ s!/[^/]+$!!;
  $$options      = $features;
}

sub MY::postamble {
    my $postamble = <<'END';
html: GD.pm
	pod2html --outfile=GD.html GD.pm
END
    $postamble;
}