fix compilation issue

lib/include/srslte/common/multiqueue.h

@@ -30,6 +30,7 @@
 
 #include <algorithm>
 #include <condition_variable>
+#include <functional>
 #include <mutex>
 #include <queue>
 #include <vector>
@@ -257,7 +258,8 @@ moveable_task_t<Capture> bind_task(Func&& f, Capture&& c)
   return moveable_task_t<Capture>{std::forward<Func>(f), std::forward<Capture>(c)};
 }
 
-using multiqueue_task_handler = multiqueue_handler<moveable_task_t<srslte::unique_byte_buffer_t> >;
+template <typename Capture>
+using multiqueue_task_handler = multiqueue_handler<moveable_task_t<Capture> >;
 
 } // namespace srslte
 

srsue/hdr/stack/ue_stack_lte.h

@@ -161,7 +161,7 @@ private:
   // Thread
   static const int STACK_MAIN_THREAD_PRIO = -1; // Use default high-priority below UHD
   using task_t                            = srslte::moveable_task_t<srslte::unique_byte_buffer_t>;
-  srslte::multiqueue_task_handler pending_tasks;
+  srslte::multiqueue_task_handler<srslte::unique_byte_buffer_t> pending_tasks;
   int sync_queue_id = -1, ue_queue_id = -1, gw_queue_id = -1, mac_queue_id = -1, background_queue_id = -1;
   srslte::task_thread_pool background_tasks; ///< Thread pool used for long, low-priority tasks
 };