Re: [PATCH] Makefile: Let kernel-doc.py use PYTHON3 override

[Jean Delvare <jdelvare@suse.de>]

Hi Mauro,

On Fri, 7 Nov 2025 07:13:42 -0300, Mauro Carvalho Chehab wrote:
> Please notice, however, that kERNEL_DOC env var is also called at some
> DRM makefiles. Perhaps the issue you're getting is there.

I'm getting the warnings from a simple "make" call with W=1, and for
pretty much all C files, not just drm drivers. For example:

$ nice make CC=/usr/bin/gcc-8 PYTHON3=/usr/bin/python3.12 W=1
(...)
  CC      arch/x86/events/intel/core.o
Warning: Python 3.7 or later is required for correct results
Warning: arch/x86/events/intel/core.c:0 Python 3.7 or later is required for correct results
  CC      arch/x86/events/intel/bts.o
Warning: Python 3.7 or later is required for correct results
Warning: arch/x86/events/intel/bts.c:0 Python 3.7 or later is required for correct results
  CC      arch/x86/events/intel/ds.o
Warning: Python 3.7 or later is required for correct results
Warning: arch/x86/events/intel/ds.c:0 Python 3.7 or later is required for correct results
  CC      arch/x86/events/intel/knc.o
Warning: Python 3.7 or later is required for correct results
Warning: arch/x86/events/intel/knc.c:0 Python 3.7 or later is required for correct results

So without my patch, PYTHON3= is ignored for part of the build, and
these recurrent warnings make it difficult to spot other warnings.
Which is the reason why I proposed a fix. Alas, I see that my first candidate
fix breaks "make htmldocs" as reported by Nathan. I'll send a different
fix which doesn't seem to break anything in my tests.

Thanks,
-- 
Jean Delvare
SUSE L3 Support