> 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)++;
>
> Why is this code going to be an error in the future?
Hi,
it seems such casting was deprecated since gcc-3.4, according to:
http://gcc.gnu.org/gcc-3.4/changes.html. (search for cast-as-lvalue, in
the C/C++ section.) This also applies to 4.0, of course. This was a
GNU-extension, not part of the C standard, so the best bet is to not
depend on it, for portability. To see why lvalue-casts are a bad idea,
check the following thread:
http://gcc.gnu.org/ml/gcc/2003-05/msg00847.html
David Fang
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