Add warning message to ensure min stack size (#575)

Co-authored-by: alfred gedeon <28123637+alfred2g@users.noreply.github.com>

portable/ThirdParty/GCC/Posix/port.c

@@ -148,7 +148,12 @@ portSTACK_TYPE * pxPortInitialiseStack( portSTACK_TYPE * pxTopOfStack,
     thread->xDying = pdFALSE;
 
     pthread_attr_init( &xThreadAttributes );
-    pthread_attr_setstack( &xThreadAttributes, pxEndOfStack, ulStackSize );
+    iRet = pthread_attr_setstack( &xThreadAttributes, pxEndOfStack, ulStackSize );
+    if( iRet != 0 )
+    {
+        fprintf( stderr, "[WARN] pthread_attr_setstack failed with return value: %d. Default stack will be used.\n", iRet );
+        fprintf( stderr, "[WARN] Increase the stack size to PTHREAD_STACK_MIN.\n" );
+    }
 
     thread->ev = event_create();