Ошибка: переопределение; различные базовые типы

INT_PTR MemFindRev(void* pcWhere, int szWhere, void* pcWhat, int szWhat) {
    return _MemFindRev((char*)pcWhere, szWhere, (char*)pcWhat, szWhat);
}
__inline INT_PTR _MemFindRev(char* pcWhere, int szWhere, char* pcWhat, int szWhat) {
    char* pcWhere1 = pcWhere;
    char cWhat1 = *pcWhat;
    char* pcWhat2 = pcWhat + 1;
    char* pEndWhat = pcWhat + szWhat;
    for (pcWhere = pcWhere1 + szWhere - szWhat; pcWhere >= pcWhere1; pcWhere--) {
        if (*pcWhere != cWhat1) {}
        else {
            char* pcWhere_ = pcWhere + 1;
            for (pcWhat = pcWhat2; pcWhat < pEndWhat; pcWhat++, pcWhere_++) {
                if (*pcWhere_ == *pcWhat) {}
                else goto skip;
            }
            return (INT_PTR)pcWhere;
        }
    skip:;
    }
    return NULL;
}

    for (pcWhere = pcWhere1 + szWhere - szWhat; pcWhere >= pcWhere1; pcWhere--)

static __inline LONG_PTR MemFindRevW_(WCHAR* pcWhere, int lnWhere, WCHAR* pcWhat, int lnWhat);
static __inline LONG_PTR MemFindRev_(char* pcWhere, int lnWhere, char* pcWhat, int lnWhat);