1/* Generic implementations for float and double always use the builtin. */
2#define USE_COPYSIGNL_BUILTIN 1
3#if __GNUC_PREREQ (7, 0)
4# define USE_COPYSIGNF128_BUILTIN 1
5#else
6# define USE_COPYSIGNF128_BUILTIN 0
7#endif
8

source code of glibc/sysdeps/generic/math-use-builtins-copysign.h