stringop-overflow compatible fix

diff --git a/CMakeLists.txt b/CMakeLists.txt
index e08ae48d90648ecee5f2dafd82964c7994f83c9d..d53a7778bbcbbb2f88fc99e50df3598e51d795c8 100644 (file)
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -504,7 +504,9 @@ CHECK_CXX_COMPILER_FLAG("-Wunused-local-typedefs" CXX_UNUSED_LOCAL_TYPEDEFS)
 CHECK_CXX_COMPILER_FLAG("-Wunused-variable" CXX_WUNUSED_VARIABLE)
 
 # gcc 10 complains about this
-if (CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 10)
+CHECK_C_COMPILER_FLAG("-Wstringop-overflow" CC_STRINGOP_OVERFLOW)
+CHECK_CXX_COMPILER_FLAG("-Wstringop-overflow" CXX_STRINGOP_OVERFLOW)
+if(CC_STRINGOP_OVERFLOW OR CXX_STRINGOP_OVERFLOW)
     set(EXTRA_C_FLAGS "${EXTRA_C_FLAGS} -Wno-stringop-overflow")
     set(EXTRA_CXX_FLAGS "${EXTRA_CXX_FLAGS} -Wno-stringop-overflow")
 endif()