linux-kernel - Re: [PATCH v3 2/4] pm:cpupower: Add SWIG bindings files for libcpupower

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Message-ID: <0ff4937d-0e51-4d67-9b8a-d2bf1bebe1fb@roeck-us.net>
Date: Sat, 21 Sep 2024 14:23:07 -0700
From: Guenter Roeck <linux@...ck-us.net>
To: "John B. Wyatt IV" <jwyatt@...hat.com>
Cc: Shuah Khan <skhan@...uxfoundation.org>, linux-pm@...r.kernel.org,
	Thomas Renninger <trenn@...e.com>, Shuah Khan <shuah@...nel.org>,
	"Rafael J. Wysocki" <rafael@...nel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, John Kacur <jkacur@...hat.com>,
	Tomas Glozar <tglozar@...hat.com>, Arnaldo Melo <acme@...hat.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	"John B. Wyatt IV" <sageofredondo@...il.com>
Subject: Re: [PATCH v3 2/4] pm:cpupower: Add SWIG bindings files for
 libcpupower

Hi,

On Wed, Sep 04, 2024 at 10:19:09PM -0400, John B. Wyatt IV wrote:
> SWIG is a tool packaged in Fedora and other distros that can generate
> bindings from C and C++ code for several languages including Python,
> Perl, and Go.
> 
> These bindings allows users to easily write scripts that use and extend
> libcpupower's functionality. Currently, only Python is provided in the
> makefile, but additional languages may be added if there is demand.
> 
> Added suggestions from Shuah Khan for the README and license discussion.
> 
> Note that while SWIG itself is GPL v3+ licensed; the resulting output,
> the bindings code, is permissively licensed + the license of the .o
> files. Please see
> https://swig.org/legal.html and [1] for more details.
> 
> [1]
> https://lore.kernel.org/linux-pm/Zqv9BOjxLAgyNP5B@hatbackup/
> 
> Suggested-by: Shuah Khan <skhan@...uxfoundation.org>
> Signed-off-by: John B. Wyatt IV <jwyatt@...hat.com>
> Signed-off-by: John B. Wyatt IV <sageofredondo@...il.com>
> ---
> 
> Changes in v3:
> 	- Reordered patch series for cpupower stub implementation to be
> 	  first.
> 	- Added pm:cpupower prefix to header and Rafael to Cc.
> 
> Changes in v2:
> 	- Implemented the function so SWIG will accept the header
> 	  definition
> ---
>  .../power/cpupower/bindings/python/.gitignore |   8 +
>  tools/power/cpupower/bindings/python/Makefile |  31 +++
>  tools/power/cpupower/bindings/python/README   |  59 +++++
>  .../bindings/python/raw_pylibcpupower.i       | 247 ++++++++++++++++++
>  4 files changed, 345 insertions(+)
>  create mode 100644 tools/power/cpupower/bindings/python/.gitignore
>  create mode 100644 tools/power/cpupower/bindings/python/Makefile
>  create mode 100644 tools/power/cpupower/bindings/python/README
>  create mode 100644 tools/power/cpupower/bindings/python/raw_pylibcpupower.i

This file is deleted when running "make mrproper".

$ git reset --hard HEAD
$ make mrproper
$ git status
On branch master
Your branch is up to date with 'origin/master'.

Changes not staged for commit:
  (use "git add/rm <file>..." to update what will be committed)
  (use "git restore <file>..." to discard changes in working directory)
	deleted:    tools/power/cpupower/bindings/python/raw_pylibcpupower.i

That is a bit more than annoying when trying to switch branches after
that happened.

Guenter