String literals are not of type unsigned char* . You probably meant to type const char* in your struct. If not, you probably do not want to assi...

As @Seth Carnegie said, string literals are of type char* , not unsigned char* . So you can avoid this warning with an explicit type cast. i.e. #...

There may be some cases when change the compiler options should be a reasonable way to solve that. An example: You have an API with some prototyp...

Change unsigned char * type to const char*.