Three solutions for error LNK2019: unresolved external symbol

Source : http://coka.popcat.net/2011/11/error-lnk2019-unresolved-external-symbol.html

I rarely use windows. I recently encountered a situation using vs. There is a method defined in libcocos2d. It is referenced in libluacocos2d. There is no problem in building libluacocos2d alone, but when building the whole program, it will report error LNK2019: unresolved external symbol. After finding this treasure island blog, I finally figured out what's going on.

My libcocos2d is packaged as a dll, The main method of troubleshooting is to open libcocos2d.lib with Notepad, directly search for the method name, and find that it is not found. The original output is a dll project, you need to add a CC_DLL in front of the method name to be exposed, rebuild, complete, details see source url