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- --- a/configure.ac
- +++ b/configure.ac
- @@ -76,12 +76,6 @@ AC_FUNC_VPRINTF
- AC_FUNC_MEMCMP
- AC_CHECK_FUNCS([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>]])
- AC_MSG_CHECKING(for GCC atomic builtins)
- AC_LINK_IFELSE(
- [
- --- a/math_compat.h
- +++ b/math_compat.h
- @@ -6,31 +6,9 @@
- * @brief Do not use, json-c internal, may be changed or removed at any time.
- */
-
- -/* Define isnan, isinf, infinity and nan 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_INFINITY
- -#include <float.h>
- -#define INFINITY (DBL_MAX + DBL_MAX)
- -#define HAVE_DECL_INFINITY
- -#endif
- -
- -#ifndef HAVE_DECL_NAN
- -#define NAN (INFINITY - INFINITY)
- -#define HAVE_DECL_NAN
- -#endif
- +#undef isnan
- +#define isnan(x) __builtin_isnan(x)
- +#undef isinf
- +#define isinf(x) __builtin_isinf(x)
-
- #endif
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