+[ --with-gcc use GCC to compile Emacs])
+AC_ARG_WITH(pop,
+[ --with-pop support POP for mail retrieval],
+[AC_DEFINE(MAIL_USE_POP)])
+AC_ARG_WITH(kerberos,
+[ --with-kerberos support Kerberos-authenticated POP],
+[AC_DEFINE(KERBEROS)])
+AC_ARG_WITH(hesiod,
+[ --with-hesiod support Hesiod to get the POP server host],
+[AC_DEFINE(HESIOD)])
+dnl This should be the last --with option, because --with-x is
+dnl added later on when we find the path of X, and it's best to
+dnl keep them together visually.