tests/cc: Use c++14 standard

default c++ standard was bumped to c++17 when using clang16+ compiler
via 907b89c, however, tests which use check tool is not yet ported
to work with c++17 standard, therefore use c++14 on tests

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Cc: Hengqi Chen <chenhengqi@outlook.com>

tests/cc/CMakeLists.txt

@@ -23,6 +23,10 @@ add_compile_options(-DCMAKE_CURRENT_BINARY_DIR="${CMAKE_CURRENT_BINARY_DIR}")
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-unused-result -fPIC")
 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wno-unused-result -fPIC")
 
+if(${LLVM_PACKAGE_VERSION} VERSION_EQUAL 16 OR ${LLVM_PACKAGE_VERSION} VERSION_GREATER 16)
+set(CMAKE_CXX_STANDARD 14)
+endif()
+
 if(ENABLE_USDT)
 set(TEST_LIBBCC_SOURCES
 	test_libbcc.cc