-/* HP cc on HP-UX 10.20 has a bug with the constant expression -0.0L.
- So we use -zero instead. */
-long double zerol = 0.0L;
+/* On HP-UX 10.20, negating 0.0L does not yield -0.0L.
+ So we use minus_zerol instead.
+ Note that the expression -LDBL_MIN * LDBL_MIN does not work on other
+ platforms, such as when cross-compiling to PowerPC on MacOS X 10.5. */
+#if defined __hpux || defined __sgi
+long double minus_zerol = -LDBL_MIN * LDBL_MIN;
+#else
+long double minus_zerol = -0.0L;
+#endif