test cases/common/169 source in dep/generated/genheader.py

#!/usr/bin/env python3

import sys

ifile = sys.argv[1]
ofile = sys.argv[2]

templ = '''#pragma once

int %s(void) {
  return 42;
}
'''

funname = open(ifile).readline().strip()

open(ofile, 'w', encoding='utf-8').write(templ % funname)