@item
This function is missing on some platforms:
AIX 4.3.2, IRIX 6.5, OSF/1 5.1, Solaris 9, mingw, MSVC 9.
+@item
+This function cannot be called from plain inline or extern inline functions
+on some platforms:
+OS X 10.8.
@end itemize
Portability problems not fixed by Gnulib: