The revert isn't in 'core-updates', python-pycairo is broken again for
the same reason.

ludo@gnu.org (Ludovic Courtès) writes:

> Hi,
>
> iyzsong@member.fsf.org (宋文武) skribis:
>
>> Hi, python-wrapper has a broken `python3-config', which
>> output cflags to the wrapper instead of the origin python3,
>> leading the build failure of python-pycairo.
>
> So it appears to resolve the CFLAGS it returns relative to its own
> argv[0] or /proc/self/exe, right?
>
> Eventually we should fix this and reinstate this commit, but reverting
> it was the right thing in the short term.
>

Here is a fix: