[FFmpeg-devel] [PATCH 3/3] configure: Remove -Wredundant-decls on OS/2 to suppress noise.

[Reimar Döffinger]

On 21.04.2016, at 06:02, Dave Yeo <daveryeo at telus.net> wrote:

> On 04/20/16 07:40 PM, Michael Niedermayer wrote:
>> On Thu, Apr 14, 2016 at 07:31:48PM -0700, Dave Yeo wrote:
>>> From a417fdf752bd7c704ed5ba0c94c5cea96e1a91ff Mon Sep 17 00:00:00 2001
>>> From: Dmitriy Kuminov <coding at dmik.org>
>>> Date: Thu, 14 Apr 2016 01:53:46 +0400
>>> Subject: [PATCH 3/3] configure: Remove -Wredundant-decls on OS/2 to suppress
>>>  noise.
>>> 
>>> This warning causes too much noise in libc 0.6.6- headers due to
>>> duplicate function decls here and there.
>>> 
>>> Signed-off-by: Dave Yeo <daveryeo at telus.net>
>>> ---
>>>  configure | 5 ++++-
>>>  1 file changed, 4 insertions(+), 1 deletion(-)
> [...]
>> 
>> maybe iam missing someting but
>> gcc doesnt/shouldnt report warnings for "system headers" AFAIK
>> 
>> [...]
> 
> It's strange. If I build under /usr/local/src with the standard environment (just tested with trunk), the warnings don't happen.
> When I built 3.0.1 in its own directory with the environment set up to find the libraries I'm linking against, eg $C_INCLUDE_PATH, $LIBRARY_PATH etc defined, I get warnings such as

Have something that results in adding -I/usr/include to the compile options or to C_INCLUDE_PATH? Probably your compiler is misconfigured to not consider that a system include path.
Adding -isystem /usr/include should fix it.