在macOS上，我曾经使用通过Homebrew安装的有问题的动态库。

但是使用我的最新设置：

• 莫哈韦河10.14.6
• Xcode 11.2.1

我开始遇到以前可以使用的库（例如protobuf）的代码签名问题。

以下是运行成功构建的项目时的控制台输出：

dyld: library not loaded: /usr/local/opt/protobuf/lib/libprotobuf.22.dylib
  Referenced from: /path/to/myproj/_build/Debug/mam-host
  Reason: no suitable image found.  Did find:
    /usr/local/opt/protobuf/lib/libprotobuf.22.dylib: code signature in (/usr/local/opt/protobuf/lib/libprotobuf.22.dylib) not valid for use in process using library Validation: mapped file has no cdhash,completely unsigned? Code has to be at least ad-hoc signed.
    /usr/local/Cellar/protobuf/3.11.1/lib/libprotobuf.22.dylib: code signature in (/usr/local/Cellar/protobuf/3.11.1/lib/libprotobuf.22.dylib) not valid for use in process using library Validation: mapped file has no cdhash,completely unsigned? Code has to be at least ad-hoc signed.
Program ended with exit code: 9

我该怎么办？

我应该

codesign -s "Mac Developer: me" /usr/local/opt/protobuf/lib/libprotobuf.22.dylib

还是我必须从源代码构建？

P.S。在运行上面的codesign命令后，我得到了完全相同的错误。