--- hdf5-1.6.6/test/dtypes.c.alias	2007-08-16 10:12:05.000000000 -0600
+++ hdf5-1.6.6/test/dtypes.c	2008-02-06 10:14:42.000000000 -0700
@@ -5645,24 +5645,33 @@
 	    for (j=0; j<nelmts; j++) {
 		/* Do it this way for alignment reasons */
 #if H5_SIZEOF_LONG_DOUBLE!=H5_SIZEOF_DOUBLE
-		long double temp[1];
+		union {
+		    long double ld[1];
+		    double d[1];
+		    float f[1];
+		    unsigned char uc[1];
+		} temp;
 #else
-		double temp[1];
+		union {
+		    double d[1];
+		    float f[1];
+		    unsigned char uc[1];
+		} temp;
 #endif
 		if (src_size<=dst_size) {
 		    for (k=0; k<dst_size; k++) buf[j*src_size+k] = HDrand();
 		} else {
 		    for (k=0; k<dst_size; k++)
-			((unsigned char*)temp)[k] = HDrand();
+			temp.uc[k] = HDrand();
 		    if (FLT_DOUBLE==src_type && FLT_FLOAT==dst_type) {
-			hw_d = *((float*)temp);
+			hw_d = *(temp.f);
 			HDmemcpy(buf+j*src_size, &hw_d, src_size);
 #if H5_SIZEOF_LONG_DOUBLE!=H5_SIZEOF_DOUBLE
 		    } else if (FLT_LDOUBLE==src_type && FLT_FLOAT==dst_type) {
-			hw_ld = *((float*)temp);
+			hw_ld = *(temp.f);
 			HDmemcpy(buf+j*src_size, &hw_ld, src_size);
 		    } else if (FLT_LDOUBLE==src_type && FLT_DOUBLE==dst_type) {
-			hw_ld = *((double*)temp);
+			hw_ld = *(temp.d);
 			HDmemcpy(buf+j*src_size, &hw_ld, src_size);
 #endif
 		    }