net/sched/act_connmark.c:203:2: error: call to undeclared library function 'index' with type 'char *(const char *, int)'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
net/sched/act_connmark.c:203:10: error: non-object type 'char *(const char *, int)' is not assignable
net/sched/act_connmark.c:204:2: error: use of undeclared identifier 'refcnt'
net/sched/act_connmark.c:205:2: error: use of undeclared identifier 'bindcnt'