[bug#41022] [PATCH core-updates] gnu: python-gst: Fix build with Python 3.8.

[Marius Bakke <mbakke@fastmail.com>]

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Christopher Baines <mail@cbaines.net> writes:

> Marius Bakke <mbakke@fastmail.com> writes:
>
>> Christopher Baines <mail@cbaines.net> writes:
>>
>>> Add a patch based on an upstream commit [1].
>>>
>>> 1: 10707f437f2fc3632067c6a0efa4432f7ebaf362
>>>
>>> * gnu/packages/patches/python-gst-fix-build-with-python-3.8.patch: New file.
>>> * gnu/local.mk (dist_patch_DATA): Add it.
>>> * gnu/packages/gstreamer.scm (python-gst)[source]: Use the patch.
>>
>> [...]
>>
>>> diff --git a/gnu/packages/patches/python-gst-fix-build-with-python-3.8.patch b/gnu/packages/patches/python-gst-fix-build-with-python-3.8.patch
>>> new file mode 100644
>>> index 0000000000..49f41e0c03
>>> --- /dev/null
>>> +++ b/gnu/packages/patches/python-gst-fix-build-with-python-3.8.patch
>>> @@ -0,0 +1,41 @@
>>> +From 10707f437f2fc3632067c6a0efa4432f7ebaf362 Mon Sep 17 00:00:00 2001
>>> +From: =?UTF-8?q?Sebastian=20Dr=C3=B6ge?= <sebastian@centricular.com>
>>> +Date: Fri, 13 Dec 2019 10:46:20 +0200
>>> +Subject: [PATCH] Fix build with Python 3.8 by also checking for
>>> + python-3.X-embed.pc
>>> +
>>> +Since Python 3.8 the normal checks don't include the Python libraries
>>> +anymore and linking of the gst-python module would fail.
>>> +
>>> +See also https://github.com/mesonbuild/meson/issues/5629
>>> +
>>> +Fixes https://gitlab.freedesktop.org/gstreamer/gst-python/issues/28
>>> +---
>>> + meson.build | 11 +++++++++--
>>> + 1 file changed, 9 insertions(+), 2 deletions(-)
>>
>> Instead of the git patch format, can you add a short comment at the top
>> along with links to the upstream commit and issue like we usually do?
>
> I usually avoid messing with patches, they're often uncooperative. Would
> something I this do?

Anything before the "diff ..." line is treated as comments/noop by the
patch utility (actually you can add comments between the @@ lines too).

> Fix build with Python 3.8 by also checking for python-3.X-embed.pc. Since
> Python 3.8 the normal checks don't include the Python libraries anymore and
> linking of the gst-python module would fail.
>
> See also https://github.com/mesonbuild/meson/issues/5629
> Fixes https://gitlab.freedesktop.org/gstreamer/gst-python/issues/28
>
> Patch based on upstream commit:
>
> https://gitlab.freedesktop.org/gstreamer/gst-python/-/commit/10707f437f2fc3632067c6a0efa4432f7ebaf362

Perfect, thanks!

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