how to update old project code to cocos2d-x-3.0rc0

cocos2d-x C++
#1

how to change
cocos2d-x-3.0alpha0-pre code to cocos2d-x-3.0rc0?

i found cocos2d-x-3.0rc0 have cocos2d folder, i copy cocos2d-x-3.0alpha0-pre project to cocos2d-x-3.0rc0,
then copy cocos2d folder to cocos2d-x-3.0alpha0-pre project, setting HEADER_SEARCH_PATHS like cocos2d-x-3.0rc0,
but i get error:

/Users/*/Documents/cocos2d-x-3.0rc0/projects/DestinyDoor/Classes/HelloWorldScene.h:4:10: ‘cocos2d.h’ file not found

#2

I think it is better to create a new project with v3.0rc0, and copy your codes into the new project.

#3

@zhangxm thank you, i will try, but i have many setting to changed.