Portability problems fixed by Gnulib:
@itemize
@item
+This function is missing on some platforms:
+AIX 5.1, HP-UX 11, IRIX 6.5, Solaris 11 2010-11.
+@item
One some systems (at least including Cygwin, Interix, OSF/1 4 and 5,
and Mac OS X) linking with @code{-lutil} is not required.
@item
Portability problems not fixed by Gnulib:
@itemize
-On some systems (at least including Solaris and HP-UX) the function is
-missing.
+@item
+This function is missing on some platforms:
+mingw.
@end itemize