+/* When also using extern inline, suppress the use of static inline in
+ standard headers of problematic Apple configurations, as Libc at
+ least through Libc-825.26 (2013-04-09) mishandles it; see, e.g.,
+ <http://lists.gnu.org/archive/html/bug-gnulib/2012-12/msg00023.html>.
+ Perhaps Apple will fix this some day. */
+#if (defined _GL_EXTERN_INLINE_IN_USE && defined __APPLE__ \
+ && (defined __i386__ || defined __x86_64__))
+# undef sigaddset
+# undef sigdelset
+# undef sigemptyset
+# undef sigfillset
+# undef sigismember
+#endif
+