Changed C standard from 11 to 99 since it's more fitting. No C11 features are used thus far.

CMakeLists.txt

@@ -16,7 +16,7 @@ AUX_SOURCE_DIRECTORY(${OPT_DIR} OPT_FILES)
 
 include_directories(${COMPILER_DIR} ${RUNTIME_DIR} ${SHARED_DIR} ${UTILS_DIR} ${OPT_DIR})
 
-SET(CMAKE_C_STANDARD 11)
+SET(CMAKE_C_STANDARD 99)
 
 SET(SRC_FILES ${COMPILER_FILES} ${RUNTIME_FILES} ${SHARED_FILES} ${UTILS_FILES} ${OPT_FILES})