X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=tests%2Ftest-ldexpl.c;h=272fc4f0cf2c92691e17d4e3086075e808f7b15e;hb=2c64312ecca19a60629cb929c1ae759109c772b5;hp=9f3de0298b0312df3db0d1c793a8b6def2ef1d42;hpb=e220635fc952c63b533873f2af39ec76aed4b4e3;p=gnulib.git

diff --git a/tests/test-ldexpl.c b/tests/test-ldexpl.c
index 9f3de0298..272fc4f0c 100644
--- a/tests/test-ldexpl.c
+++ b/tests/test-ldexpl.c
@@ -39,6 +39,16 @@
     }									     \
   while (0)
 
+/* 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 ()
 {
@@ -78,7 +88,7 @@ main ()
   }
 
   { /* Negative zero.  */
-    x = -0.0L;
+    x = minus_zero;
     y = ldexpl (x, 0); ASSERT (y == x); ASSERT (signbit (x));
     y = ldexpl (x, 5); ASSERT (y == x); ASSERT (signbit (x));
     y = ldexpl (x, -5); ASSERT (y == x); ASSERT (signbit (x));