--- povray-3.6.1/configure.ac	2006-01-15 20:11:41.000000000 +0000
+++ povray-3.6.1/configure.ac	2006-01-15 20:11:19.000000000 +0000
@@ -1051,11 +1051,19 @@
       # PPC 7400 (aka G4).  To be precise, the vector instructions are new
       # in the four digit model number PowerPC processors (aka G4), but gcc
       # cannot (as of February 2003) use them automatically anyway! [trf]
-      for pov_flags in "-mpowerpc" "-mcpu=750 -mtune=7450" "-mmultiple" "-mstring" "-mfused-madd"; do
+      if "$host" != powerpc64* ; then
+          for pov_flags in "-mpowerpc" "-mcpu=750 -mtune=7450"; do
+            POV_PROG_CXX_FLAGS([$pov_flags],
+              [if test "$subdirs"; then { POV_PROG_CC_FLAGS([$pov_flags]) }; fi]
+            )
+          done
+      fi
+      for pov_flags in "-mmultiple" "-mstring" "-mfused-madd"; do
         POV_PROG_CXX_FLAGS([$pov_flags],
-          [if test "$subdirs"; then { POV_PROG_CC_FLAGS([$pov_flags]) }; fi]
+            [if test "$subdirs"; then { POV_PROG_CC_FLAGS([$pov_flags]) }; fi]
         )
       done
+
       ;;
 
     sparc-*)