diff options
Diffstat (limited to 'lib/isnanl.h')
| -rw-r--r-- | lib/isnanl.h | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/lib/isnanl.h b/lib/isnanl.h index a79b040d58..36a733f9d2 100644 --- a/lib/isnanl.h +++ b/lib/isnanl.h @@ -1,5 +1,5 @@ /* Test for NaN. - Copyright (C) 2007 Free Software Foundation, Inc. + Copyright (C) 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 @@ -17,7 +17,11 @@ #if HAVE_ISNANL /* Get declaration of isnan macro or (older) isnanl function. */ # include <math.h> -# ifdef isnan +# if __GNUC__ >= 4 + /* GCC 4.0 and newer provides three built-ins for isnan. */ +# undef isnanl +# define isnanl(x) __builtin_isnanl ((long double)(x)) +# elif defined isnan # undef isnanl # define isnanl(x) isnan ((long double)(x)) # endif |