support for local common symbols (whatever that is good for); introduce ir_visibility...
[cparser] / lextest /
drwxr-xr-x   ..
-rwxr-xr-x 246 do_tests.sh
drwxr-xr-x - legalc
drwxr-xr-x - preprocessor
drwxr-xr-x - tokenstreams
drwxr-xr-x - warnings