--- hdf5-1.6.4/config/gnu-flags.cflags	2004-12-29 16:27:16.000000000 +0100
+++ hdf5-1.6.4/config/gnu-flags	2005-05-06 21:55:53.829425949 +0200
@@ -135,11 +135,11 @@
         # optimization levels (which shows up as failures for various integer
         # types -> long long conversions in the test/dtypes test).  Perhaps
         # later versions of gcc will fix this bug... - QAK - 2003/10/20
-        PROD_CFLAGS="-O"
+        PROD_CFLAGS="$NOFP"
         ;;
       gcc-4*)
         # Be optimistic about future versions of gcc.. :-) - QAK - 2003/10/20
-        PROD_CFLAGS="-O3"
+        PROD_CFLAGS="$NOFP"
         ;;
       *)
         PROD_CFLAGS="-O"