Work around Solaris 10 math.h bug.

[gnulib.git] / lib / math.in.h

diff --git a/lib/math.in.h b/lib/math.in.h
index bb715ae..c2b8b81 100644 (file)
--- a/lib/math.in.h
+++ b/lib/math.in.h
@@ -1,6 +1,6 @@
 /* A GNU-like <math.h>.
 
-   Copyright (C) 2002-2003, 2007, 2008 Free Software Foundation, Inc.
+   Copyright (C) 2002-2003, 2007-2008 Free Software Foundation, Inc.
 
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -34,8 +34,11 @@ extern "C" {
 
 /* POSIX allows platforms that don't support NAN.  But all major
    machines in the past 15 years have supported something close to
-   IEEE NaN, so we define this unconditionally.  */
-#ifndef NAN
+   IEEE NaN, so we define this unconditionally.  We also must define
+   it on platforms like Solaris 10, where NAN is present but defined
+   as a function pointer rather than a floating point constant.  */
+#if !defined NAN || @REPLACE_NAN@
+# undef NAN
   /* The Compaq (ex-DEC) C 6.4 compiler chokes on the expression 0.0 / 0.0.  */
 # ifdef __DECC
 static float
@@ -50,6 +53,13 @@ _NaN ()
 # endif
 #endif
 
+/* Solaris 10 defines HUGE_VAL, but as a function pointer rather
+   than a floating point constant.  */
+#if @REPLACE_HUGE_VAL@
+# undef HUGE_VAL
+# define HUGE_VAL (1.0 / 0.0)
+#endif
+
 /* Write x as
      x = mantissa * 2^exp
    where