@item
This function has quadratic instead of linear worst-case complexity on some
platforms:
-glibc 2.8, FreeBSD 6.2, NetBSD 5.0, AIX 5.1, Cygwin 1.5.x.
+glibc 2.8, FreeBSD 6.2, NetBSD 5.0, AIX 5.1, Solaris 11 2010-11, Cygwin 1.5.x.
@end itemize
Portability problems not fixed by Gnulib: