Port hasOption/cloneOptionsFrom from package_opts.

kdesrc-build

@@ -1500,7 +1500,7 @@ EOF
         my ($self, $key) = @_;
         my $name = $self->name();
 
-        return exists $main::package_opts{$name}{$key};
+        return exists $self->{options}{$key};
     }
 
     # Sets the option refered to by the first parameter (a string) to the
@@ -1524,7 +1524,7 @@ EOF
         my $self = shift;
         my $other = assert_isa(shift, 'Module');
 
-        $main::package_opts{$self->name()} = dclone($main::package_opts{$other->name()});
+        $self->{options} = dclone($other->{options});
     }
 
     # Returns the path to the desired directory type (source or build),