Re: notes on building 3.20

[Emilio Pozuelo Monfort <pochu27 gmail com>]

On 23/03/16 18:00, Bastien Nocera wrote:
> On Wed, 2016-03-23 at 12:44 -0400, Matthias Clasen wrote:
> > Hey, some quick observations from building the 3.20.0 moduleset with
> > gcc 6 on Fedora 24:
> >
> > gcc got a lot better. That means it has a lot more warnings. The ones
> > that affect multiple modules are -Werror=format-nonliteral and
> > -Werror=format-y2k. Both of cause build failures all over the place.
> >
> > Please make an effort to fix these in your code. At least the
> > format-nonliteral warning often indicates actual, exploitable
> > security
> > holes.
>
> If you still have gcc 5, you can make this error show up by using those
> CFLAGS:
> -Werror=format=2 -Wformat=2
>
> Make sure that -Wformat=2 isn't overwritten later in the CFLAGS list.
> And for those on Fedora 23, you can easily install GCC 6 to enjoy the
> build breakage yourselves by running:
> dnf update --releasever=24 gcc binutils

In Debian, gcc-6 is available from experimental.

Emilio