[macports-ports] branch master updated: ffmpeg: force gcc6 on PPC

[Ryan Schmidt]

I guess my question was: is there something unique about ffmpeg that makes it require gcc6 on PowerPC, as opposed to one of the alternatives MacPorts would choose, or is MacPorts choosing inappropriate alternatives for all ports on PowerPC? If the latter, the fix should be in base, not in individual ports.


On Oct 20, 2017, at 21:37, Ken Cunningham wrote:

> The fallbacks on PPC don't work correctly, I find.
> 
> If I were to blacklist gcc42, MacPorts would lead in almost all cases to building it with clang-3.4, which always fails. 
> 
> Also, there's no point falling back to any gcc prior to gcc6.
> 
> So what I saw as options was to blacklist:
> 
> all the gcc versions individually prior to gcc6
> all the {clang} versions
> all the macports-clang-* versions
> 
> and then  add fallbacks to macports-gcc-6
> 
> 
> -- or -- 
> 
> just clear the blacklisting and whitelist macports-gcc-6 like we do in the cxx11 1.1 PortGroup
> 
> It just seemed much more straightforward to do the latter.
> 
> I'm always open to better plans and opinions, though.
> 
> Ken
> 
> 
> 
> 
> On 2017-10-20, at 7:08 PM, Ryan Schmidt wrote:
> 
>> 
>> On Oct 20, 2017, at 20:49, Ken wrote:
>> 
>>> Ken (kencu) pushed a commit to branch master
>>> in repository macports-ports.
>>> 
>>> 
>>> https://github.com/macports/macports-ports/commit/e1f1b6b20678fed08e81f8a65ea0062f59a1f64c
>>> 
>>> The following commit(s) were added to refs/heads/master by this push:
>>> 
>>>    new e1f1b6b  ffmpeg: force gcc6 on PPC
>>> 
>>> e1f1b6b is described below
>>> 
>>> 
>>> commit e1f1b6b20678fed08e81f8a65ea0062f59a1f64c
>>> 
>>> Author: Ken Cunningham <kencu at macports.org>
>>> AuthorDate: Fri Oct 20 18:49:11 2017 -0700
>>> 
>>>   ffmpeg: force gcc6 on PPC
>>> 
>>>   closes: https://trac.macports.org/ticket/55124
>>> 
>>> ---
>>> multimedia/ffmpeg/Portfile | 8 ++++++++
>>> 1 file changed, 8 insertions(+)
>>> 
>>> diff --git a/multimedia/ffmpeg/Portfile b/multimedia/ffmpeg/Portfile
>>> index bdc0919..61ec6e3 100644
>>> --- a/multimedia/ffmpeg/Portfile
>>> +++ b/multimedia/ffmpeg/Portfile
>>> @@ -106,6 +106,14 @@ if {[lsearch [get_canonical_archs] i386] != -1} {
>>>    compiler.blacklist-append {clang < 422.1.7}
>>> }
>>> 
>>> +platform darwin powerpc {
>>> +    # https://trac.macports.org/ticket/55124
>>> +    # requires newer compiler than gcc4.2 to build
>>> +    compiler.blacklist
>>> +    compiler.whitelist    macports-gcc-6
>>> +    universal_variant     no
>>> +}
>> 
>> 
>> Is there a specific reason why you did it this way, instead of what we usually do, which is to blacklist the compilers that don't work and let MacPorts choose the next-best alternative? I know gcc* isn't in the list of compilers MacPorts will fall back to. Do we maybe just need to add gcc6 to the fallback list on PowerPC?
>> 
>> 
>> 
>