Index: /issm/trunk/externalpackages/mpich2/configs/macosx64/configure.sh
===================================================================
--- /issm/trunk/externalpackages/mpich2/configs/macosx64/configure.sh	(revision 5665)
+++ /issm/trunk/externalpackages/mpich2/configs/macosx64/configure.sh	(revision 5666)
@@ -1,4 +1,4 @@
 #!/bin/bash
-export CFLAGS=" -m64"
-export FFLAGS=" -m64"
+export CFLAGS=" -arch i386"
+export FFLAGS=" -arch i386"
 ./configure --prefix="$ISSM_DIR/externalpackages/mpich2/install" --enable-f91=gfortran --enable-sharedlibs=osx-gcc