target_compile_definition(target PUBLIC $<$<BOOL:${USING_CLANG}>:-DUSE_CLANG>) Run Code Online (Sandbox Code Playgroud) 选项2 您还可以使用: target_compile_definition(target PUBLIC $<$<OR:$<CXX_COMPILER_ID:Clang>,$<CXX_COMPILER_ID:AppleClang>>:-DUSE_CLANG> Run Code Online (Sandbox Co...