[FFmpeg-devel] [PATCH 2/2] configure: add pkg-config check for openal

Stephen Hutchinson qyot27 at gmail.com
Thu Nov 30 03:39:36 EET 2017

On 11/29/2017 3:58 PM, Hendrik Leppkes wrote:
> The same applies here as with twolame, we don't really want to
> duplicate all sorts of checks, so if pkg-config has been available for
> a sufficiently long time, then just use it always.

Ok.  TwoLAME is pretty clear-cut, but OpenAL raises more questions.

The configure check says 'OpenAL 1.1 or compatible'. If we're
assuming openal-soft rather than the really old Creative SDK,
then the git history of openal.pc.in its current location dates
back to version 1.11.753, in 2009 (the .pc.in file first appeared in
2008, which appears to be with version 1.5.304).

Practically, I think it's safe to assume users are going to fetch
a reasonably current version of openal-soft, but for precision's
sake should that mean we force a version check so that version
1.11.753 (or 1.12 for convenience?) or higher is required?
And at that point the description for --enable-openal would
probably need to change so that it explicitly states using

I thought I remembered OpenAL coming up in a discussion on
ffmpeg-devel on pkg-config sometime a few months ago
(or maybe it was on Trac?), and there was something mentioned
about OS X or file paths not always leading to the correct .pc file,
and that using pkg-config couldn't always find it.  I can't seem to
find that now, though.

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