X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=tests%2Ftest-ceill.c;h=49e0c6519e708beaa0bf546c24273aefb912bda4;hb=1b22ddf54eb25f38d049c46e4b5d7323b15d8ecf;hp=80ff75ba667eb4c1cbe5bef91ab96464946c8b34;hpb=4eb59b32a2a687c113f3c0dfc166fc2573acb84f;p=gnulib.git

diff --git a/tests/test-ceill.c b/tests/test-ceill.c
index 80ff75ba6..49e0c6519 100644
--- a/tests/test-ceill.c
+++ b/tests/test-ceill.c
@@ -20,6 +20,7 @@
 
 #include <math.h>
 
+#include <float.h>
 #include <stdio.h>
 #include <stdlib.h>
 
@@ -38,9 +39,15 @@
     }									     \
   while (0)
 
-/* HP cc on HP-UX 10.20 has a bug with the constant expression -0.0L.
-   So we use -zero instead.  */
-long double zero = 0.0L;
+/* On HP-UX 10.20, negating 0.0L does not yield -0.0L.
+   So we use minus_zero 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_zero = -LDBL_MIN * LDBL_MIN;
+#else
+long double minus_zero = -0.0L;
+#endif
 
 int
 main ()
@@ -51,7 +58,7 @@ main ()
 
   /* Zero.  */
   ASSERT (ceill (0.0L) == 0.0L);
-  ASSERT (ceill (-zero) == 0.0L);
+  ASSERT (ceill (minus_zero) == 0.0L);
   /* Positive numbers.  */
   ASSERT (ceill (0.3L) == 1.0L);
   ASSERT (ceill (0.7L) == 1.0L);