I got this error with go 1.2 on Ubuntu Trusty:
# github.com/davidlazar/vuvuzela/rand
gocode/src/github.com/davidlazar/vuvuzela/rand/cpu_amd64.s:2 6a: No such file or directory: textflag.h
I am not familiar with go but I think it's because go 1.4 or later is required?