Index: Portfile
===================================================================
--- Portfile	(revision 57409)
+++ Portfile	(working copy)
@@ -42,6 +42,7 @@
 # On PowerPC machines, CFLAGS must be empty to get -force_cpusubtype_ALL.
 pre-configure {
     # Set in pre-configure so any universal flags are removed as well.
+    configure.build_arch
     configure.cflags
     configure.cxxflags
 }