I was having problems building a working romcc with the -O2
-rw-r--r-- 17987 COPYING
-rw-r--r-- 11216 Makefile
-rw-r--r-- 2589 README
drwxr-xr-x - documentation
drwxr-xr-x - payloads
drwxr-xr-x - src
drwxr-xr-x - util