gcc compile errors

I am getting these errors when I compile sim_routing.cc program by this command

../../bin/cxx sim_routing.cc
g++ -Wall -o sim_routing sim_routing.cxx

following errors are produced:

../../common/priority_q.h : In member function 'bool guardedQueue<ITEM>::Validate(Const char*);
error : there are no开发者_JS百科 argument to 'strcat' that depend on template parameter so a declaration of 'strcat' must be avaible.
error : <if you use -fpermissive  g++ will accept your code but allowing use of undeclared name is deprecated>

When I tried to change commom/priority_q.h, it shows it is read only; file changes cannot be accepted.

How these errors can be removed?

#include <cstring> before the header triggering your error.