AS_IF([test "${enable_libtool}" != "no" && test "${enable_shared_libvlc}"], [
AC_MSG_ERROR([--enable-shared-libvlc and --enable-libtool are mutually exclusive])
])
AS_IF([test "${enable_libtool}" != "no" && test "${enable_shared_libvlc}"], [
AC_MSG_ERROR([--enable-shared-libvlc and --enable-libtool are mutually exclusive])
])