diff --git a/utils.cmake b/utils.cmake
index 43222be..3758c8c 100644
--- a/utils.cmake
+++ b/utils.cmake
@@ -119,14 +119,6 @@ function(setup_project)
             set(CMAKE_C_STANDARD_REQUIRED ON PARENT_SCOPE)
             set(CMAKE_C_EXTENSIONS OFF PARENT_SCOPE)
             set(CMAKE_C_VISIBILITY_PRESET "hidden" PARENT_SCOPE)
-            if(NOT DEFINED CMAKE_C_FLAGS)
-                message(WARNING "CMAKE_C_FLAGS is not defined.")
-                set(CMAKE_C_FLAGS)
-            endif()
-            if(NOT DEFINED CMAKE_C_FLAGS_RELEASE)
-                message(WARNING "CMAKE_C_FLAGS_RELEASE is not defined.")
-                set(CMAKE_C_FLAGS_RELEASE)
-            endif()
             if(MSVC)
                 string(REGEX REPLACE "[-|/]w " " " CMAKE_C_FLAGS ${CMAKE_C_FLAGS})
                 string(REGEX REPLACE "[-|/]W[0|1|2|3|4|all|X] " " " CMAKE_C_FLAGS ${CMAKE_C_FLAGS})
@@ -169,14 +161,6 @@ function(setup_project)
             set(CMAKE_CXX_STANDARD_REQUIRED ON PARENT_SCOPE)
             set(CMAKE_CXX_EXTENSIONS OFF PARENT_SCOPE)
             set(CMAKE_CXX_VISIBILITY_PRESET "hidden" PARENT_SCOPE)
-            if(NOT DEFINED CMAKE_CXX_FLAGS)
-                message(WARNING "CMAKE_CXX_FLAGS is not defined.")
-                set(CMAKE_CXX_FLAGS)
-            endif()
-            if(NOT DEFINED CMAKE_CXX_FLAGS_RELEASE)
-                message(WARNING "CMAKE_CXX_FLAGS_RELEASE is not defined.")
-                set(CMAKE_CXX_FLAGS_RELEASE)
-            endif()
             if(MSVC)
                 string(REGEX REPLACE "[-|/]GR-? " " " CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS})
                 string(REGEX REPLACE "[-|/]EH(a-?|r-?|s-?|c-?)+ " " " CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS})
@@ -209,6 +193,9 @@ function(setup_project)
                     set(CMAKE_CXX_FLAGS_RELEASE ${CMAKE_CXX_FLAGS_RELEASE} PARENT_SCOPE)
                 endif()
             else()
+                if("x${CMAKE_CXX_FLAGS}" STREQUAL "x")
+                    message(FATAL_ERROR "CMAKE_CXX_FLAGS is empty!!!!!!!!!!")
+                endif()
                 string(REPLACE "-w " " " CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS})
                 string(REGEX REPLACE "-W[all|extra|error|pedantic] " " " CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS})
                 if(PROJ_ARGS_NO_WARNING)