use ExtUtils::MakeMaker;
use Env qw(XERCES_LIB XERCES_INCLUDE XERCESCROOT XERCES_DEVEL SWIG);
use strict;
use vars qw($INCLUDES);
$XERCESCROOT = "C:/usr/xerces_new";
if (defined $XERCES_LIB || defined $XERCES_INCLUDE) {
  # this is the default, so do nothing
} elsif (defined $XERCESCROOT) {
  # they are instructing us to use the build directories
  $XERCES_INCLUDE = "$XERCESCROOT/include\n";
  $XERCES_LIB = "$XERCESCROOT/lib\n";
} 

my $LIBS = '';
$INCLUDES = '-I. -I./Handler';
if (defined $XERCES_LIB) {
  print STDERR "Using XERCES_LIB = $XERCES_LIB";
  $LIBS = "-L$XERCES_LIB ";
}

if (defined $XERCES_INCLUDE) {
  print STDERR "Using XERCES_INCLUDE = $XERCES_INCLUDE";
  $INCLUDES .= " -I$XERCES_INCLUDE";
}

if (!defined $XERCES_LIB && !defined $XERCES_INCLUDE) {
  print STDERR <<EOW;

   WARNING

You have not defined any of the following environment variables:
   XERCESCROOT
   XERCES_LIB
   XERCES_INCLUDE

These instruct me how to locate the Xerces header files, and the
Xerces dynamic library. If they are installed in a standard system
directory, I will located them without those variables.

However, if they have been installed in a non-standard location
(e.g. '/usr/include/xerces'), then I will need help. See the README
for more info.

Proceeding ...
EOW
}

# We need to know which version of libxerces we are to use
my $XERCES_MAJOR_VERSION = '1.5';
# this substitution will yield '1_4' from '1.4' to be used by 'LIBS'
my $XERCES_LIB_VERSION = $XERCES_MAJOR_VERSION;
$XERCES_LIB_VERSION =~ s/\./_/;
#my $LIBXERCES = "-lxerces-c$XERCES_LIB_VERSION";
my $LIBXERCES = "-lxerces-c_1D";
#my $LIBXERCES = "-lxerces-c_1";

$LIBS .= " $LIBXERCES";

# now we ensure that libxerces is in the library path
# if not we die()
print STDERR "Checking to see if libxerces is in your library path...";
my $lib = "test";
#{
  # suppress any messages from Liblist::ext()
#  local *STDOUT;
#  local *STDERR;
#  open(STDERR, ">/dev/null");
#  open(STDOUT, ">/dev/null");
#  ($lib) = ExtUtils::Liblist::ext(MM->new(),$LIBS);
#}
die <<EOE unless $lib;


    !!!WHOA!!!

I couldn\'t find $LIBXERCES anywhere in your library path. Begging to
differ with perl, this is most assuredly *NOT* harmless. This is a
critical error that will prevent you from running Xerces.pm.

Check your settings of \$XERCES_INCLUDE and \$XERCES_LIB, and rerun
'perl Makefile.PL'

EOE

print STDERR "Success!!\n";

# give some nice feedback for the user
print STDERR "Using Xerces-C version: $XERCES_MAJOR_VERSION\n";

# replace this with an absolute path if needed
my @handler_headers;
chomp(@handler_headers = `C:/cygwin/bin/find Handler -name "*.swig.hpp"`);

sub Xerces_postamble {
  chomp(my @header_files = `C:/cygwin/bin/find Xerces_headers -name "*.hpp"`);
  push(@header_files,@handler_headers);
  local $" = ' ';
  <<TERMINUS;
Xerces.C Xerces.pm: Xerces.i @header_files postSource.pl postModule.pl
	\$(SWIG) -I. -ILib -ILib/perl5 \$(INC) -D\$(SWIG_VERSION) -package XML::Xerces -perl5 -c++ -shadow -o Xerces.C Xerces.i
	perl postSource.pl Xerces.C
	perl postModule.pl Xerces.pm
TERMINUS
}

# we only consider using SWIG if we are a Xerces Developer
my @MACRO;
my $CFLAGS = '-D_REENTRANT -DDEBIAN';
if ($XERCES_DEVEL) {
  print STDERR "Welcome Xerces Developer!\n";
  # if we're to use SWIG, we need to know which version is available
  my $swig = $SWIG || 'swig';
  my ($sv_maj,$sv_min) = qx[$swig -version 2>&1] =~ /(\d+)\.(\d+)/;
  @MACRO = ('macro'       => {
    'SWIG'         => "$swig",
    'SWIG_VERSION' => "SWIG_$ {sv_maj}_$ {sv_min}",
  });
  $CFLAGS .= ' -D$(SWIG_VERSION)';
  print STDERR "Using SWIG version: SWIG_$ {sv_maj}_$ {sv_min}\n";
  *MY::postamble = \&Xerces_postamble;
}

# set up the list of object files to include in Xerces.o
my $OBJS = "Xerces.o ";
my @handler_objs = @handler_headers;
$OBJS .= join(' ', map {s/\.swig\.hpp/\.o/;$_} @handler_objs);

# write the makefile
WriteMakefile(
  'AUTHOR'      => 'The Xerces-P developers',
  'ABSTRACT'    => 'Perl Interface for Xerces XML API',
  'CCFLAGS'     => "$CFLAGS -DWIN32 -DHAS_BOOL",
  'PM'          => {
    'Xerces.pm' => '$(INST_LIB)/XML/Xerces.pm',
    'DOMParse/DOMParse.pm' => '$(INST_LIB)/XML/Xerces/DOMParse.pm',
  },
  'INC'         => $INCLUDES,
  'LIBS'        => [$LIBS],
#  'LIBS'        => '-lpthread',
  'NAME'        => 'XML::Xerces',
  'OBJECT'      => $OBJS,
#  'OPTIMIZE'    => '-g',
  'DIR'         => ['DOMParse', 'Handler'],
  'VERSION'     => "$XERCES_MAJOR_VERSION.3",
  @MACRO
);