directly; include instead." #endif /* IEEE Not A Number. */ #if __GNUC_PREREQ(3,3) # define NAN (__builtin_nanf ("")) #elif defined __GNUC__ # define NAN \ (__extension__ \ ((union { unsigned __l __attribute__ ((__mode__ (__SI__))); float __d; }) \ { __l: 0x7fc00000UL }).__d) #else # include # if __BYTE_ORDER == __BIG_ENDIAN # define __nan_bytes { 0x7f, 0xc0, 0, 0 } # endif # if __BYTE_ORDER == __LITTLE_ENDIAN # define __nan_bytes { 0, 0, 0xc0, 0x7f } # endif static union { unsigned char __c[4]; float __d; } __nan_union __attribute_used__ = { __nan_bytes }; # define NAN (__nan_union.__d) #endif /* GCC. */