added ENABLE_GUI option

CMakeLists.txt

@@ -53,6 +53,7 @@ configure_file(
 option(STATIC_MKL      "Statically link MKL libraries"   OFF)
 option(DISABLE_BLADERF "Disable BladeRF"                 OFF)
 option(RPATH           "Enable RPATH"                    OFF)
+option(ENABLE_GUI      "Enable GUI"                      ON)
 
 set(GCC_ARCH native CACHE STRING "GCC compile for specific architecture.")
 

srsue/src/phy/phch_worker.cc

@@ -287,7 +287,7 @@ void phch_worker::work_imp()
   
   /* Tell the plotting thread to draw the plots */
 #ifdef ENABLE_GUI
-  if (get_id() == plot_worker_id) {
+  if ((int) get_id() == plot_worker_id) {
     sem_post(&plot_sem);    
   }
 #endif