+ [
+ PKG_CHECK_MODULES([LUA], [lua-5.1],
+ [with_liblua="yes"],
+ [
+ PKG_CHECK_MODULES([LUA], [lua5.1],
+ [with_liblua="yes"],
+ [
+ PKG_CHECK_MODULES([LUA], [lua51],
+ [with_liblua="yes"],
+ [with_liblua="no (pkg-config cannot find liblua)"]
+ )
+ ]
+ )
+ ]
+ )
+ ]