[FFmpeg-devel] [PATCH] build: make out-of-tree builds bit-identical to in-tree builds

[James Almer]

On 1/22/2016 9:34 PM, Hendrik Leppkes wrote:
> On Fri, Jan 22, 2016 at 12:33 AM, Andreas Cadhalpun
> <andreas.cadhalpun at googlemail.com> wrote:
>> On 16.01.2016 02:29, Michael Niedermayer wrote:
>>> On Mon, Dec 28, 2015 at 10:12:56PM +0100, Andreas Cadhalpun wrote:
>>>> Previously the full source path was embedded inconsistently in the debug
>>>> information between in-tree/out-of-tree builds.
>>>>
>>>> The 'vpath %.inc' becomes necessary for finding
>>>> libavfilter/all_channel_layouts.inc in out-of-tree builds.
>>>>
>>>> The full source path is still embedded in the debug information, but
>>>> it's now independent of whether building in-tree or out-of-tree.
>>>>
>>>> The biggest improvement of this patch is that gdb now always searches
>>>> for the path relative to the source directory. It still also searches
>>>> for the full path.
>>>> Previously it searched only for the full path in out-of-tree builds,
>>>> making the debug information generated by Debian's buildds rather hard
>>>> to use.
>>>
>>> i am in favor of this being fixed, and the patch seems to work here
>>> iam no makefile expert though ...
>>
>> As there were no other comments, I took this as an OK and pushed
>> the patch.
>>
>> Our FATE clients should be able to test this more thoroughly than I
>> can, anyway.
> 
> This broke all MSVC builds.
> 
> - Hendrik

https://trac.ffmpeg.org/ticket/5180

That user may be able to help you come up with a fix for this. At the very
least he found the line that broke msvc.