I'm taking on some older code, and I'm getting this warning:
"warning: target of assignment not really an lvalue; this will be a
hard error in the future"
for the following line:
*((uint32_t*)dst)++ = *((uint32_t*)src)++;
The real problem is with ((uint32_t*)dst)++ (and with ((uint32_t*)src)
++). The reason is that (uint32_t*)dst is not a valid lvalue;
however, *(uint32_t*)dst is.
Why is this code going to be an error in the future?
For now, I just replaced it with:
uint32_t *aligned32Src, *aligned32Dst;
aligned32Src = (uint32_t *)src;
aligned32Dst = (uint32_t *)dst;
*aligned32Dst++ = *aligned32Src++;
How about
*(uint32_t*)dst = *(uint32_t*)src;
dst = (typeof(dst))((uint32_t*)dst + 1);
src = (typeof(src))((uint32_t*)src + 1);
Where you would probably want to use the actual type of dst and src
in the case since typeof is a gcc extension.
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