* \param[out] solver_in will be the stdin of the solver
* \param[out] solver_out will be the stdout of the solver
*
- * \return true if the solver could be started and the pipes
- * are set up correctly, otherwise false and the pipes are invalid
+ * \return PID of the started solver or 0 if failure occurred
*/
- bool static ExecuteSolver(const char* const solver, int *solver_in, int *solver_out);
+ pid_t static ExecuteSolver(const char* const solver, int * const solver_in, int * const solver_out, bool /*overload*/);
+ APT_DEPRECATED bool static ExecuteSolver(const char* const solver, int *solver_in, int *solver_out);
/** \brief call an external resolver to handle the request
*