A program compiled with -pg and run will generate a file filename.gmon
but gprof still expects gmon.out to exist.

How-To-Repeat: /tmp|Fri10:30pm} cat > test.c
int
main(void) {
  return 0;
}
/tmp|Fri10:30pm} cc -pg -o test test.c
/tmp|Fri10:30pm} ./test
/tmp|Fri10:30pm} gprof test
gmon.out: No such file or directory
/tmp|Fri10:31pm} ls
done_articles  nbcCD7004      nbcbL7057      out            out2           out3           test*          test.c         test.gmon      vi.recover/