when Lua is not found, fallback to compiling the one that comes bundled in our sources
#this file is included only when system Lua library is not found
file(GLOB lua_src *.c *.h)
set(LIBRARY_OUTPUT_PATH ${EXECUTABLE_OUTPUT_PATH})
if(WIN32)
add_definitions(-DLUA_BUILD_AS_DLL)
add_library(lua SHARED ${lua_src})
set_target_properties(lua PROPERTIES PREFIX "")
install(TARGETS lua RUNTIME DESTINATION ${target_dir})
else(WIN32)
add_definitions(-DLUA_USE_LINUX)
add_library(lua STATIC ${lua_src})
endif(WIN32)