Developer can set the priority and stacksize for builtin-app
1. Add calling REGISTER at context tab
```bash
$(BUILTIN_REGISTRY)$(DELIM)$(APPNAME)_main.bdat: $(DEPCONFIG) Makefile
- $(call REGISTER,$(APPNAME),$(FUNCNAME),$(THREADEXEC))
+ $(call REGISTER,$(APPNAME),$(FUNCNAME),$(THREADEXEC),$(PRIORITY),$(STACKSIZE))
context: $(BUILTIN_REGISTRY)$(DELIM)$(APPNAME)_main.bdat
```
APPNAME =
FUNCNAME =
THREADEXEC =
+PRIORITY =
+STACKSIZE =
```
For arguments details, please refer **Public APIs** [[tab]](../shell/README.md#public-apis) of TASH README