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- --- a/configure.ac
- +++ b/configure.ac
- @@ -43,12 +43,6 @@ AC_FUNC_MEMCMP
- AC_FUNC_MALLOC
- AC_FUNC_REALLOC
- AC_CHECK_FUNCS(strcasecmp strdup strerror snprintf vsnprintf vasprintf open vsyslog strncasecmp setlocale)
- -AC_CHECK_DECLS([INFINITY], [], [], [[#include <math.h>]])
- -AC_CHECK_DECLS([nan], [], [], [[#include <math.h>]])
- -AC_CHECK_DECLS([isnan], [], [], [[#include <math.h>]])
- -AC_CHECK_DECLS([isinf], [], [], [[#include <math.h>]])
- -AC_CHECK_DECLS([_isnan], [], [], [[#include <float.h>]])
- -AC_CHECK_DECLS([_finite], [], [], [[#include <float.h>]])
-
- #check if .section.gnu.warning accepts long strings (for __warn_references)
- AC_LANG_PUSH([C])
- --- a/math_compat.h
- +++ b/math_compat.h
- @@ -1,28 +1,9 @@
- #ifndef __math_compat_h
- #define __math_compat_h
-
- -/* Define isnan and isinf on Windows/MSVC */
- -
- -#ifndef HAVE_DECL_ISNAN
- -# ifdef HAVE_DECL__ISNAN
- -#include <float.h>
- -#define isnan(x) _isnan(x)
- -# endif
- -#endif
- -
- -#ifndef HAVE_DECL_ISINF
- -# ifdef HAVE_DECL__FINITE
- -#include <float.h>
- -#define isinf(x) (!_finite(x))
- -# endif
- -#endif
- -
- -#ifndef HAVE_DECL_NAN
- -#error This platform does not have nan()
- -#endif
- -
- -#ifndef HAVE_DECL_INFINITY
- -#error This platform does not have INFINITY
- -#endif
- +#undef isnan
- +#define isnan(x) __builtin_isnan(x)
- +#undef isinf
- +#define isinf(x) __builtin_isinf(x)
-
- #endif
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