Stricter test whether isnanl works.

diff --git a/ChangeLog b/ChangeLog
index 8ae01efc4a21c9de3c746a766019c17b2e58a967..391bb3f5757ce3335cc4b86ac8c9c09cd5b21df6 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2008-04-27  Bruno Haible  <bruno@clisp.org>
+
+       * m4/isnanl.m4 (gl_FUNC_ISNANL_WORKS): Also test the behaviour on
+       quiet NaNs.
+
 2008-04-27  Bruno Haible  <bruno@clisp.org>
 
        Make test-yesno.sh work on mingw.

diff --git a/m4/isnanl.m4 b/m4/isnanl.m4
index c2bddc665a52bb28b05ba3a15f81110681f38146..660a898a3dfb8803e647d78bab8329e6cc18e09c 100644 (file)
--- a/m4/isnanl.m4
+++ b/m4/isnanl.m4
@@ -1,4 +1,4 @@
-# isnanl.m4 serial 6
+# isnanl.m4 serial 7
 dnl Copyright (C) 2007-2008 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -134,6 +134,10 @@ int main ()
   memory_long_double m;
   unsigned int i;
 
+  /* gcc-3.4.3 on IRIX 6.5 appears to have a problem with this.  */
+  if (!isnanl (0.0L / 0.0L))
+    return 1;
+
   /* The isnanl function should be immune against changes in the sign bit and
      in the mantissa bits.  The xor operation twiddles a bit that can only be
      a sign bit or a mantissa bit (since the exponent never extends to