#endif
#endif
-/* This silences a few compilation warnings on FreeBSD. */
-#ifdef BSD_SYSTEM_AHB
-#undef BSD_SYSTEM_AHB
-#undef BSD_SYSTEM
-#if __FreeBSD__ == 1
-#define BSD_SYSTEM 199103
-#elif __FreeBSD__ == 2
-#define BSD_SYSTEM 199306
-#elif __FreeBSD__ >= 3
-#define BSD_SYSTEM 199506
-#endif
+#ifndef __has_attribute
+# define __has_attribute(a) 0 /* non-clang */
#endif
#ifdef DARWIN_OS
#define emacs_raise(sig) msdos_fatal_signal (sig)
-#ifndef HAVE_SETPGID
-# ifdef USG
-# define setpgid(pid, pgid) setpgrp ()
-# else
-# define setpgid(pid, pgid) setpgrp (pid, pgid)
-# endif
-#endif
-
/* Define one of these for easier conditionals. */
#ifdef HAVE_X_WINDOWS
/* We need a little extra space, see ../../lisp/loadup.el and the
#define NO_INLINE
#endif
-#if (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 1))
+#if (__clang__ \
+ ? __has_attribute (externally_visible) \
+ : (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 1)))
#define EXTERNALLY_VISIBLE __attribute__((externally_visible))
#else
#define EXTERNALLY_VISIBLE