Shaun Jackman <sjackman@xxxxxxxxx> writes: > The following statement is the result of a macro expansion (hence > all the extra parenthesis). gcc's giving me a new warning about > using a casted lvalue. I don't see where there is a casted lvalue > here. The rhs of the assigment is an rvalue, so I'll ignore > that. port is casted, but it's an rvalue at this point. Once it's > dereferenced it's an lvalue, but there's no further casting after > that. What's gone wrong here? > > int port; > const void* src; > (*((volatile uint16_t*)(port)) = (*((uint16_t *) src)++)); The casted lvalue is ((uint16_t *) src). The increment operator needs a proper lvalue. By the way, accessing nonvolatile objects through a volatile object pointer is dangerous. It might do what you want, but is not guaranteed to. -- Falk
