[FFmpeg-devel] [PATCH] configure: Avoid use of nonstandard features of sed

[Mark Thompson]

On 02/12/2018 21:12, Carl Eugen Hoyos wrote:
> 2018-12-02 20:46 GMT+01:00, Mark Thompson <sw at jkqxz.net>:
>> On 02/12/2018 12:49, Carl Eugen Hoyos wrote:
>>> 2018-11-23 1:48 GMT+01:00, Carl Eugen Hoyos <ceffmpeg at gmail.com>:
>>>> 2018-11-22 23:47 GMT+01:00, Mark Thompson <sw at jkqxz.net>:
>>>>> Standard sed does not support EREs.
>>>>
>>>> Please mention ticket #7310 in the commit message.
>>>
>>> Ping.
>>
>> I was waiting for:
> 
> Sorry, thank you!
> 
>>> The Darwin version script part was only tested by running it on the
>>> version scripts and looking at the output, not actually building on that
>>> platform - it would be helpful if someone could check that it actually
>>> works.
>>
>> Can someone check this?
> 
> Why is this needed?
> What I mean is: Is there a Darwin platform with a too old sed where
> your change would help?

I have no idea - I know nothing about tools on Apple platforms.  If all versions of sed you might be able to run on Darwin have a nonstandard extension supporting EREs via a -E option then it is indeed unnecessary, but given the nature of the patch I thought it would be sensible to eliminate all of the potentially-troublesome nonstandard use.  On the other hand it is a change and could break things which currently work, so ensuring that it has been tested on the actual target platform seemed like a good idea.

Thanks,

- Mark