Stuck in installation “make -j 4”

[jiahuili430]

My system is Virtual Box Ubuntu 16.04, installed all the dependencies, but when use this command:
$ make -j 4
It always said there's no file "plugin-api.h" in the directory.
Actually, I tried to go to the folder, the file is in that folder, but when installed, the error message always show up.

[jinhojun]

It seems you this problem comes from LLVM installation.

Could you check you followed the direction described here?
https://github.com/sslab-gatech/fuzzification/blob/master/docs/install.md#llvm-with-gold-plugin