linux-kernel - Re: [PATCH 1/2] kernel-doc: don't let V=1 change outcome

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Date:   Tue, 6 Jun 2023 13:21:47 +0900
From:   Masahiro Yamada <masahiroy@...nel.org>
To:     Johannes Berg <johannes@...solutions.net>
Cc:     linux-kernel@...r.kernel.org, linux-kbuild@...r.kernel.org,
        linux-doc@...r.kernel.org
Subject: Re: [PATCH 1/2] kernel-doc: don't let V=1 change outcome

On Mon, Jun 5, 2023 at 5:19 PM Johannes Berg <johannes@...solutions.net> wrote:
>
> On Mon, 2023-06-05 at 09:36 +0900, Masahiro Yamada wrote:
>
> > > +if (defined($ENV{'KDOC_WRETURN'})) {
> > > +       $Wreturn = "$ENV{'KDOC_WRETURN'}";
> > > +}
> > > +
> > > +if (defined($ENV{'KDOC_WSHORT_DESC'})) {
> > > +       $Wshort_desc = "$ENV{'KDOC_WSHORT_DESC'}";
> > > +}
> > > +
> > > +if (defined($ENV{'KDOC_WCONTENTS_BEFORE_SECTION'})) {
> > > +       $Wcontents_before_sections = "$ENV{'KDOC_WCONTENTS_BEFORE_SECTION'}";
> > > +}
> > > +
> > > +if (defined($ENV{'KDOC_WALL'})) {
> > > +       $Wreturn = "$ENV{'KDOC_WALL'}";
> > > +       $Wshort_desc = "$ENV{'KDOC_WALL'}";
> > > +       $Wcontents_before_sections = "$ENV{'KDOC_WALL'}";
> > > +}
> >
> >
> >
> > Adding an environment variable to each of them is tedious.
>
> Agree. And adding one for -Wall is especially tedious because you have
> to spell out the list of affected warnings in two places :)
>
> > If you enable -Wall via the command line option,
> > these lines are unneeded?
> >
> > For example,
> >
> > ifneq ($(KBUILD_EXTRA_WARN),)
> >   cmd_checkdoc = $(srctree)/scripts/kernel-doc -none \
> >          $(if $(findstring 2, $(KBUILD_EXTRA_WARN)), -Wall) $<
> > endif
> >
>
> Yes, that should be possible.
>
> I feel like maybe we should still have individual settings for the three
> different classes, because you might want to have -Wshort-desc without
> the extra -Wcontents-before-sections (which I thought about removing
> entirely, kernel-doc seems to parse just fine that way, what's the point
> of it?)
>
> But we could even move the env var handling _completely_ to the Makefile
> if you don't mind, and then we don't have to have two places in the
> script that need to be aligned all the time.

Yes, probably that will be a good idea.



-- 
Best Regards
Masahiro Yamada