We were conditionally defining the C wrapper, but unconditionally using
it. So if it didn't exist then things would have broken anyway.
INLINE int __hscore_s_isfifo(mode_t m) { return S_ISFIFO(m); }
INLINE int __hscore_s_isblk(mode_t m) { return S_ISBLK(m); }
INLINE int __hscore_s_ischr(mode_t m) { return S_ISCHR(m); }
-#ifdef S_ISSOCK
INLINE int __hscore_s_issock(mode_t m) { return S_ISSOCK(m); }
#endif
-#endif
#if !defined(_MSC_VER) && !defined(__MINGW32__) && !defined(_WIN32)
INLINE int