On 5 June 2015 at 16:55, Paolo Bonzini wrote:
> The GCC manual says "GCC does not use the latitude given in C99 and C11
> only to treat certain aspects of signed '<<' as undefined, but this is
> subject to change". It would certainly be nice if they removed the
> "this is subject to change" part.
On 12 October 2014 16:32, Chen Gang wrote:
> Hello All:
>
> I found an issue about g++, it is OK for "-Wall -O0", but will report
> -Wunused-variable for "-Wall -O1|2|3|s". The original version (e.g.
> gcc 4.8.3 redhat version) does not report warning for "-Wall -O?".
>
> The related operation:
>
