less stringent test for compiler version

CMakeLists.txt

@@ -48,7 +48,7 @@ find_package(Filesystem REQUIRED)
 
 if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
 	if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS_EQUAL 8.4.0)
-		message(FATAL_ERROR "Your gnu compiler is too old, please use a more recent one")
+		message(WARNING "Your gnu compiler is perhaps too old, please use a more recent one if you get a segmentation in the build process when running symop-map-generator")
 	endif()
 	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wno-unused-parameter -Wno-missing-field-initializers")
 endif()