SWDEV-277697 - [CatchTest] Disable CXX Extensions (gnu++11 etc) on CMake

Change-Id: I17abd329c16cf0a61316186558828d0524b98281

tests/catch/CMakeLists.txt

@@ -59,6 +59,9 @@ if(HIP_COMPILER MATCHES "nvcc")
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -ccbin clang")
 endif()
 
+# Disable CXX extensions (gnu++11 etc)
+set(CMAKE_CXX_EXTENSIONS OFF)
+
 add_custom_target(build_tests)
 
 add_subdirectory(unit)