AC_CHECK_FUNC(wctype, [],
[AC_CHECK_LIB(w, wctype)])
+# Some systems (e.g. Solaris) have `gethostbyname' in libnsl.
+AC_SEARCH_LIBS(gethostbyname, nsl)
+
# Some systems (e.g. Solaris) have `socketpair' in libsocket.
AC_SEARCH_LIBS(socketpair, socket)