Remove include, lib

Update launch.json to include Linux specific debug config
Update CMakeList to compile on Linux

engine/CMakeLists.txt

@@ -15,17 +15,26 @@ set(SOURCES
 include_directories(${CMAKE_SOURCE_DIR}/include)
 link_directories(${CMAKE_SOURCE_DIR}/lib)
 
-file(GLOB SDL2_LIB "${CMAKE_SOURCE_DIR}/lib/*.lib")
-file(GLOB LUAJIT_LIB "${CMAKE_SOURCE_DIR}/lib/*.lib")
-
 add_executable(engine ${SOURCES})
 
 if(WIN32)
+    file(GLOB SDL2_LIB "${CMAKE_SOURCE_DIR}/lib/*.lib")
+    file(GLOB LUAJIT_LIB "${CMAKE_SOURCE_DIR}/lib/*.lib")
+
+    target_link_libraries(engine
+        ${SDL2_LIB}
+        ${CMAKE_SOURCE_DIR}/lib/luajit.lib
+    )
 elseif(UNIX)
+    include_directories(${SDL2_INCLUDE_DIRS} ${LUAJIT_INCLUDE_DIRS})
+    link_directories(${SDL2_LIBRARY_DIRS} ${LUAJIT_LIBRARY_DIRS})
+
+    target_link_libraries(engine
+        ${SDL2_LIBRARIES}
+        ${LUAJIT_LIBRARIES}
+        luajit
+        dl  # just in case LuaJIT needs dynamic linking
+        m   # math lib, commonly needed
+    )
 endif()
 
-# Link all required libraries
-target_link_libraries(engine
-    ${SDL2_LIB}
-    ${CMAKE_SOURCE_DIR}/lib/luajit.lib
-)