[Buildroot] [PATCH] package/janus-gateway: fix compilation with older gcc versions

[Thomas Petazzoni]

Dear Yann E. MORIN,

On Sun,  4 Jan 2015 10:59:35 +0100, Yann E. MORIN wrote:
> janus-gateway forcibly uses -Wunused-but-set-variable, which is not
> available for all gcc versions. For example, gcc-4.5, as used in
> Sourcery CodeBench PowerPC 2011.03, does not have it.
> 
> Fixes:
>     http://autobuild.buildroot.org/results/6d8/6d8e15ac5d592a51b6a8d2ceb9fc1ca954428ed7/
>     http://autobuild.buildroot.org/results/abe/abe25b588bf6de0d76cce0135841d65dc66d5cca/
>     [...]
> 
> Signed-off-by: "Yann E. MORIN" <yann.morin.1998 at free.fr>
> Cc: Gregory Dymarek <gregd72002 at gmail.com>

I have an alternate version of this patch that does detect if
-Wunused-but-set-variable is supported by gcc or not, and uses it only
when available. I believe such a patch has a higher chance of being
accepted upstream, no?

Best regards,

Thomas
-- 
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com