X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=tests%2Ftest-truncl.c;h=4b00e350ac7fa1b492362f2cfb5a7807483aefb4;hb=35600a9a833bc287a025214c9601574e4a8115d7;hp=dd2a9c1f0b669058337389972d5d7d71b632bed9;hpb=e220635fc952c63b533873f2af39ec76aed4b4e3;p=gnulib.git

diff --git a/tests/test-truncl.c b/tests/test-truncl.c
index dd2a9c1f0..4b00e350a 100644
--- a/tests/test-truncl.c
+++ b/tests/test-truncl.c
@@ -20,6 +20,7 @@
 
 #include <math.h>
 
+#include <float.h>
 #include <stdio.h>
 #include <stdlib.h>
 
@@ -38,6 +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 ()
 {
@@ -47,7 +58,7 @@ main ()
 
   /* Zero.  */
   ASSERT (truncl (0.0L) == 0.0L);
-  ASSERT (truncl (-0.0L) == 0.0L);
+  ASSERT (truncl (minus_zero) == 0.0L);
   /* Positive numbers.  */
   ASSERT (truncl (0.3L) == 0.0L);
   ASSERT (truncl (0.7L) == 0.0L);