In file included from do_getaccesslvl.c:2:
./mproc.h:16:1: error: unknown type name 'EXTERN'
EXTERN struct mproc {
^
./mproc.h:16:8: error: expected identifier or '('
EXTERN struct mproc {
       ^
do_getaccesslvl.c:12:16: error: incomplete definition of type 'struct mproc'
    return process->level;
           ~~~~~~~^