Index: Portfile
===================================================================
--- Portfile	(revision 62175)
+++ Portfile	(working copy)
@@ -%ld,%ld +%ld,%ld @@
 PortSystem  1.0
 name		gromacs
 version		4.0.5
-revision	2
+revision	3
 categories	science math
 maintainers	adfernandes openmaintainer
 description	The World's fastest Molecular Dynamics package
@@ -%ld,%ld +%ld,%ld @@
 
 configure.args  --bindir=${prefix}/lib/${name}/bin --enable-shared --with-x
 
+platform darwin 10 {
+    configure.args-append   --enable-apple-64bit
+}
+
 variant no_x11 {
     depends_lib-delete      port:openmotif
     configure.args-delete   --with-x
@@ -%ld,%ld +%ld,%ld @@
     configure.args-append   --with-gsl
 }
 
+variant openmpi description {build using openmpi parallelization} {
+    depends_lib-append      port:openmpi
+    configure.args-append   --enable-mpi
+}
+
 if { ![variant_isset gcc42] && ![variant_isset gcc43] && ![variant_isset gcc44] } {
     default_variants-append     +gcc44
 }