I'm not familiar with commandline toolset of gcc/llvm. It is so simple but yet not working as expected. I am becoming suspicious about everything - maybe whole macOS is corrupt?
The problem is that the command:
ar rcu libt.a @responsefiledoes not work; the error is ar: @responsefile: No such file or directory. But responsefile is right there. I tried 'gcc @testfile' and it works. Help!