Set the minimum gcc version required in CMakeLists.txt

CMakeLists.txt

@@ -47,6 +47,12 @@ message(STATUS "Build type: " ${CMAKE_BUILD_TYPE})
 message(STATUS "CMAKE_CXX_COMPILER: " ${CMAKE_CXX_COMPILER})
 message(STATUS "CMAKE_CXX_COMPILER: " ${CMAKE_CXX_COMPILER_ID})
 
+if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
+    if (CMAKE_CXX_COMPILER_VERSION VERSION_LESS 5.4)
+        message(FATAL_ERROR "GCC version 5.4 or higher required")    
+    endif()
+endif()
+
 # SDL 2
 set(SDL2_INCLUDE_DIR ${CMAKE_SOURCE_DIR}/3rdparty/SDL2/include/)
 set(SDL2_LIBRARY_DIR ${CMAKE_SOURCE_DIR}/3rdparty/SDL2/build/)