On Sat, Oct 24, 2020 at 07:06:20PM +0200, Florian Weimer via Gcc-help wrote: > * mark at yahoo via Gcc-help: > > > The necessity to add many of these pragmas makes the code difficult to > > read. Is there a variable attribute that could be used instead, > > something like: > > char *buffer __attribute__((uninitialized)); > > In the past, this has been suggested as an official way to suppress the > warning: > > char *buffer = buffer; > > See <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=36296#c3> for an > example. > > It has the downside that it is almost certainly not valid C++ and > probably not valid C, either. It isn't valid C, see 6.3.2.1/2, last sentence (accessing a var when it is uninitialised, like the RHS of the assignment here does, is undefined behaviour). Yup. Segher
