@itemize
@item
This function has an incompatible declaration on some platforms:
-Solaris 11 2010-11 (when @code{_POSIX_PTHREAD_SEMANTICS} is not defined).
+Solaris 11 2011-11 (when @code{_POSIX_PTHREAD_SEMANTICS} is not defined).
@end itemize
Portability problems not fixed by Gnulib:
@itemize
@item
This function is missing on some platforms:
-mingw.
+mingw, MSVC 9.
@item
This function may put more than 26 bytes into the argument buffer if an
invalid year is passed.