qurt cmake dependency fixes

platforms/qurt/CMakeLists.txt

@@ -46,6 +46,7 @@ else()
 			${module_libraries}
 			${df_driver_libs}
 			m
+			modules__muorb__adsp
 		)
 
 	add_custom_target(upload

platforms/qurt/cmake/px4_impl_os.cmake

@@ -192,6 +192,7 @@ function(px4_os_add_flags)
 
 	set(added_optimization_flags
 		-fPIC
+		-fmath-errno
 		)
 
 	# Clear -rdynamic flag which fails for hexagon

platforms/qurt/src/px4_layer/CMakeLists.txt

@@ -57,4 +57,5 @@ add_library(px4_layer
 	${QURT_LAYER_SRCS}
 	${CONFIG_SRC}
 )
+target_link_libraries(px4_layer PRIVATE work_queue)
 add_dependencies(px4_layer uorb_msgs) # dataman requires mission

platforms/qurt/src/px4_layer/px4_qurt_impl.cpp

@@ -166,3 +166,9 @@ int fputc(int c, FILE *stream)
 {
 	return c;
 }
+
+int putchar(int character)
+{
+	PX4_ERR("Error: Calling unresolved symbol stub:[%s]", __FUNCTION__);
+	return character;
+}