support, for x86_64 and x86. */
#if (defined __x86_64__ \
? __GNUC_PREREQ (4, 3) \
- : (defined __GNU__ ? __GNUC_PREREQ (4, 5) : __GNUC_PREREQ (4, 4)))
+ : (defined __GNU__ ? __GNUC_PREREQ (4, 5) : __GNUC_PREREQ (4, 4))) \
+ || defined __clang__
# define __HAVE_FLOAT128 1
#else
# define __HAVE_FLOAT128 0
/* Defined to concatenate the literal suffix to be used with _Float128
types, if __HAVE_FLOAT128 is 1. */
# if __HAVE_FLOAT128
-# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
+# if !__GNUC_PREREQ (7, 0) || defined __cplusplus \
+ || defined __clang__
/* The literal suffix f128 exists only since GCC 7.0. */
# define __f128(x) x##q
# else
/* Defined to a complex binary128 type if __HAVE_FLOAT128 is 1. */
# if __HAVE_FLOAT128
-# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
+# if !__GNUC_PREREQ (7, 0) || defined __cplusplus \
+ || defined __clang__
/* Add a typedef for older GCC compilers which don't natively support
_Complex _Float128. */
typedef _Complex float __cfloat128 __attribute__ ((__mode__ (__TC__)));
# if __HAVE_FLOAT128
/* The type _Float128 exists only since GCC 7.0. */
-# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
-/* need a clang 5.0 case here? */
+# if !__GNUC_PREREQ (7, 0) || defined __cplusplus \
+ || defined __clang__
typedef __float128 _Float128;
# endif
#else /* GCC */
/* __builtin_huge_valf128 doesn't exist before GCC 7.0. */
-# if !__GNUC_PREREQ (7, 0)
+# if !__GNUC_PREREQ (7, 0) && !defined __clang__
# define __builtin_huge_valf128() ((_Float128) __builtin_huge_val ())
# endif
Converting a narrower sNaN to _Float128 produces a quiet NaN, so
attempts to use _Float128 sNaNs will not work properly with older
compilers. */
-# if !__GNUC_PREREQ (7, 0)
+# if !__GNUC_PREREQ (7, 0) && !defined __clang__
# define __builtin_copysignf128 __builtin_copysignq
# define __builtin_fabsf128 __builtin_fabsq
# define __builtin_inff128() ((_Float128) __builtin_inf ())
e.g.: __builtin_signbitf128, before GCC 6. However, there has never
been a __builtin_signbitf128 in GCC and the type-generic builtin is
only available since GCC 6. */
-# if !__GNUC_PREREQ (6, 0)
+# if !__GNUC_PREREQ (6, 0) && !defined __clang__
# define __builtin_signbitf128 __signbitf128
# endif