Add Noreturn attribute in template port for static analysis (FreeRTOS#1060)

* Add _Noreturn attribute in the template function to fix MISRA 17.11 advisory warnings

* Add _Noreturn attribute in function declaration

* Code review suggestions

Author: kar-rahul-aws

examples/cmake_example/main.c

@@ -45,7 +45,7 @@
 
 /*-----------------------------------------------------------*/
 
-static void exampleTask( void * parameters );
+static void exampleTask( void * parameters ) __attribute__( ( noreturn ) );
 
 /*-----------------------------------------------------------*/
 
@@ -62,7 +62,7 @@ static void exampleTask( void * parameters )
 }
 /*-----------------------------------------------------------*/
 
-void main( void )
+int main( void )
 {
     static StaticTask_t exampleTaskTCB;
     static StackType_t exampleTaskStack[ configMINIMAL_STACK_SIZE ];
@@ -84,6 +84,8 @@ void main( void )
     {
         /* Should not reach here. */
     }
+
+    return 0;
 }
 /*-----------------------------------------------------------*/
 

portable/template/portmacro.h

@@ -105,7 +105,7 @@ extern void vPortYield( void );
 #define portYIELD()                                           vPortYield()
 
 /* Task function macros as described on the FreeRTOS.org WEB site. */
-#define portTASK_FUNCTION_PROTO( vFunction, pvParameters )    void vFunction( void * pvParameters )
+#define portTASK_FUNCTION_PROTO( vFunction, pvParameters )    void vFunction( void * pvParameters ) __attribute__( ( noreturn ) )
 #define portTASK_FUNCTION( vFunction, pvParameters )          void vFunction( void * pvParameters )
 
 #if ( configNUMBER_OF_CORES > 1 )