diff options
Diffstat (limited to 'm4/isnanl.m4')
| -rw-r--r-- | m4/isnanl.m4 | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/m4/isnanl.m4 b/m4/isnanl.m4 index 9874418a69..75d5462975 100644 --- a/m4/isnanl.m4 +++ b/m4/isnanl.m4 @@ -1,4 +1,4 @@ -# isnanl.m4 serial 20 +# isnanl.m4 serial 21 dnl Copyright (C) 2007-2020 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, @@ -68,7 +68,10 @@ AC_DEFUN([gl_HAVE_ISNANL_NO_LIBM], AC_LINK_IFELSE( [AC_LANG_PROGRAM( [[#include <math.h> - #if __GNUC__ >= 4 + #ifndef __has_builtin + # define __has_builtin(name) 0 + #endif + #if __GNUC__ >= 4 && (!defined __clang__ || __has_builtin (__builtin_isnanl)) # undef isnanl # define isnanl(x) __builtin_isnanl ((long double)(x)) #elif defined isnan @@ -93,7 +96,10 @@ AC_DEFUN([gl_HAVE_ISNANL_IN_LIBM], AC_LINK_IFELSE( [AC_LANG_PROGRAM( [[#include <math.h> - #if __GNUC__ >= 4 + #ifndef __has_builtin + # define __has_builtin(name) 0 + #endif + #if __GNUC__ >= 4 && (!defined __clang__ || __has_builtin (__builtin_isnanl)) # undef isnanl # define isnanl(x) __builtin_isnanl ((long double)(x)) #elif defined isnan @@ -123,7 +129,10 @@ AC_DEFUN([gl_FUNC_ISNANL_WORKS], #include <float.h> #include <limits.h> #include <math.h> -#if __GNUC__ >= 4 +#ifndef __has_builtin +# define __has_builtin(name) 0 +#endif +#if __GNUC__ >= 4 && (!defined __clang__ || __has_builtin (__builtin_isnanl)) # undef isnanl # define isnanl(x) __builtin_isnanl ((long double)(x)) #elif defined isnan |