[FFmpeg-devel] [PATCH] configure: check if NAN can be used as a constant initializer

[Hendrik Leppkes]

On Wed, Sep 13, 2017 at 7:49 PM, James Almer <jamrial at gmail.com> wrote:
> On 9/13/2017 2:23 PM, Carl Eugen Hoyos wrote:
>> 2017-09-13 19:10 GMT+02:00 James Almer <jamrial at gmail.com>:
>>> Some targets, like NetBSD and DJGPP, don't seem to support it.
>>>
>>> Signed-off-by: James Almer <jamrial at gmail.com>
>>> ---
>>>  configure | 6 ++++++
>>>  1 file changed, 6 insertions(+)
>>>
>>> diff --git a/configure b/configure
>>> index ab1550d39b..4855ca54c9 100755
>>> --- a/configure
>>> +++ b/configure
>>> @@ -3222,6 +3222,7 @@ pixfmts_super2xsai_test_deps="super2xsai_filter"
>>>  tinterlace_filter_deps="gpl"
>>>  tinterlace_merge_test_deps="tinterlace_filter"
>>>  tinterlace_pad_test_deps="tinterlace_filter"
>>> +tonemap_filter_deps="const_nan"
>>
>> No objections but what was wrong with using another
>> default to avoid the additional check?
>
> DBL_MIN and DBL_MAX are both valid values for the option. Turning one of
> them into "auto" does not seem like a good idea to me.
>

valid perhaps, but also reasonably useful? ie. would anyone ever use
them and get a useful result?

- Hendrik