bootstrap: fix handling of various perl --version formats

[gnulib.git] / tests / test-frexp.c

diff --git a/tests/test-frexp.c b/tests/test-frexp.c
index 47db2be..0cd0823 100644 (file)
--- a/tests/test-frexp.c
+++ b/tests/test-frexp.c
@@ -24,7 +24,13 @@
 #include <stdio.h>
 #include <stdlib.h>
 
-#include "isnand.h"
+#include "isnand-nolibm.h"
+#include "nan.h"
+
+/* Avoid some warnings from "gcc -Wshadow".
+   This file doesn't use the exp() function.  */
+#undef exp
+#define exp exponent
 
 #define ASSERT(expr) \
   do                                                                        \
@@ -32,22 +38,15 @@
       if (!(expr))                                                          \
         {                                                                   \
           fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
+          fflush (stderr);                                                  \
           abort ();                                                         \
         }                                                                   \
     }                                                                       \
   while (0)
 
-/* The Compaq (ex-DEC) C 6.4 compiler chokes on the expression 0.0 / 0.0.  */
-#ifdef __DECC
-static double
-NaN ()
-{
-  static double zero = 0.0;
-  return zero / zero;
-}
-#else
-# define NaN() (0.0 / 0.0)
-#endif
+/* HP cc on HP-UX 10.20 has a bug with the constant expression -0.0.
+   So we use -zero instead.  */
+double zero = 0.0;
 
 static double
 my_ldexp (double x, int d)
@@ -73,7 +72,7 @@ main ()
   { /* NaN.  */
     int exp = -9999;
     double mantissa;
-    x = NaN ();
+    x = NaNd ();
     mantissa = frexp (x, &exp);
     ASSERT (isnand (mantissa));
   }
@@ -107,7 +106,7 @@ main ()
   { /* Negative zero.  */
     int exp = -9999;
     double mantissa;
-    x = -0.0;
+    x = -zero;
     mantissa = frexp (x, &exp);
     ASSERT (exp == 0);
     ASSERT (mantissa == x);