使用compile

    //生成CompilationDatabase
    string s;
    string &ErrorMessage = s;

    const char *complieJsonPath = ....读入字符串;
    unique_ptr jsonDatabasePtr = clang::tooling::JSONCompilationDatabase::loadFromFile(complieJsonPath,ErrorMessage,clang::tooling::JSONCommandLineSyntax::Gnu);

    if(!jsonDatabasePtr){
        cout << s;
        return 1;
    }

    database = jsonDatabasePtr.get();
    vector vec;//要执行的文件列表
    ClangTool Tool(*database, vec);