使用make命令后，会发生以下错误。我跟着SO页面
Mac Error: Undefined symbols for architecture x86_64，但无法解决这个问题。
- cc1plus: error: unrecognized command line option '-std=c++11'
-cc1plus: error: unrecognized command line option '-std=c++11'
-cc1plus: error: unrecognized command line option '-stdlib=libc++'
-make[1]: *** [src/util/CommandOptions.lo] Error 1
-make[1]: Leaving directory `/home/saddam/softwareforsphinx/MIT-Language-Modeling-Toolkit'`enter code here`
make: *** [all-recursive] Error 1``