error: invalid argument ‘-std=gnu++98‘ not allowed with ‘C‘

錯誤：

Making signal interposition lib...
error: invalid argument '-std=gnu++98' not allowed with 'C'
make[6]: *** [libjsig.dylib] Error 1
make[6]: *** Waiting for unfinished jobs....      

解決辦法，參考：

https://quantum6.blog.csdn.net/article/details/108467447