FC_PTR_TO_UINT(), FC_UINT_TO_PTR(), FC_SIZE_TO_PTR(), and FC_PTR_TO_SIZE() all have a bug that they actually use signed intptr_t instead of unsigned uintptr_t, nor does configure.ac setup that type. While these would be easy to fix, it's even easier to just drop them. They have no current users, and we don't want new users for such legacy casting methods.
FC_PTR_TO_UINT(), FC_UINT_TO_PTR(), FC_SIZE_TO_PTR(), and FC_PTR_TO_SIZE() all have a bug that they actually use signed intptr_t instead of unsigned uintptr_t, nor does configure.ac setup that type. While these would be easy to fix, it's even easier to just drop them. They have no current users, and we don't want new users for such legacy casting methods.