package ExtUtils::CBuilder::Platform::os2;

use ExtUtils::CBuilder::Platform::Unix;

our ($VERSION, @ISA);
$VERSION = '0.22';
@ISA = qw(ExtUtils::CBuilder::Platform::Unix);

sub need_prelink { 1 }

sub prelink {
  # Generate import libraries (XXXX currently near .DEF; should be near DLL!)
  my $self = shift;
  my %args = %( < @_ );

  my @res = $self->SUPER::prelink(< %args);
  die "Unexpected number of DEF files" unless (nelems @res) == 1;
  die "Can't find DEF file in the output"
    unless @res[0] =~ m,^(.*)\.def$,si;
  my $libname = "$1$self->{config}->{?lib_ext}";	# Put .LIB file near .DEF file
  $self->do_system('emximp', '-o', $libname, @res[0]) or die "emxexp: res=$^CHILD_ERROR";
  return  @(@res, $libname);
}

sub _do_link($self, $how, %< %args) {
  if ($how eq 'lib_file'
      and (defined %args{?module_name} and length %args{?module_name})) {

    # DynaLoader::mod2fname() is a builtin func
    my $lib = DynaLoader::mod2fname(\split m/::/, %args{?module_name});

    # Now know the basename, find directory parts via lib_file, or objects
    my $objs = ( (ref %args{?objects}) ?? %args{?objects} !! \@(%args{?objects}) );
    my $near_obj = $self->lib_file(< @$objs);
    my $ref_file = ( defined %args{?lib_file} ?? %args{?lib_file} !! $near_obj );
    my $lib_dir = ($ref_file =~ m,(.*)[/\\],s ?? "$1/" !! '' );
    my $exp_dir = ($near_obj =~ m,(.*)[/\\],s ?? "$1/" !! '' );

    %args{+dl_file} = $1 if $near_obj =~ m,(.*)\.,s; # put ExportList near OBJ
    %args{+lib_file} = "$lib_dir$lib.$self->{config}->{?dlext}";	# DLL file

    # XXX _do_link does not have place to put libraries?
    push @$objs, $self->perl_inc() . "/libperl$self->{config}->{?lib_ext}";
    %args{+objects} = $objs;
  }
  # Some 'env' do exec(), thus return too early when run from ksh;
  # To avoid 'env', remove (useless) shrpenv
  local $self->{config}->{+shrpenv} = '';
  return $self->SUPER::_do_link($how, < %args);
}

sub extra_link_args_after_prelink($self, %< %args) {

  my @DEF = grep { m/\.def$/i }, @{%args{prelink_res}};
  die "More than one .def files created by `prelink' stage" if (nelems @DEF) +> 1;
  # XXXX No "$how" argument here, so how to test for dynamic link?
  die "No .def file created by `prelink' stage"
    unless (nelems @DEF) or not nelems @{%args{?prelink_res}};

  my @after_libs = @($OS2::is_aout ?? ()
      !! $self->perl_inc() . "/libperl_override$self->{config}->{?lib_ext}");
  # , "-L", "-lperl"
  return @(@after_libs, @DEF);
}

sub link_executable {
  # ldflags is not expecting .exe extension given on command line; remove -Zexe
  my $self = shift;
  local $self->{config}->{+ldflags} = $self->{config}->{?ldflags};
  $self->{config}->{+ldflags} =~ s/(?<!\S)-Zexe(?!\S)//;
  return $self->SUPER::link_executable(< @_);
}


1;