# This extension has a default value of "auto" and depends on the value of $2
if test "x$BUILD_[]UP" = "xauto" ; then
BUILD_[]UP=$2
+fi
+if test "x$BUILD_[]UP" = "xyes" ; then
+ if test "x$2" = "xno" ; then
+ AC_MSG_ERROR([Extension []UP requested, but dependencies are not met])
+ fi
fi])
m4_undefine([xcb_defopt])dnl