Here is a doozy that is kinda hard to notice
If you have a “common.h” with this
#ifdef _WINDLL #define DECLSPEC __declspec(dllexport) #else #define DECLSPEC __declspec(dllimport) #endif
and you use that to build multiple dlls, some which use methods from other dll’s that you have built with that header
YOU WILL BE PUNISHED
because when you read the header from within one dll for the methods of another dll you are using from it, it will read that header with dllexport
and not dllimport as it should.
so, at the top of every header with an exported class
you should have
#ifdef THISCLASS_DLL #define THISCLASS_API __declspec(dllexport) #else #define THISCLASS_API __declspec(dllimport) #else
OR ELSE
I was lazy and I paid the price
