Re: [PATCH v1 1/1] scripts/tags.sh: Fix gtags generation for O= kernel builds

From: "Ahmed S. Darwish" <darwi@linutronix.de>
To: Nathan Chancellor <nathan@kernel.org>
Cc: Masahiro Yamada <masahiroy@kernel.org>,
	Nick Desaulniers <ndesaulniers@google.com>,
	Nicolas Schier <nicolas@fjasle.eu>,
	Thomas Gleixner <tglx@linutronix.de>,
	linux-kbuild@vger.kernel.org, LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v1 1/1] scripts/tags.sh: Fix gtags generation for O= kernel builds
Date: Fri, 5 May 2023 00:00:47 +0200	[thread overview]
Message-ID: <ZFQrD3qKIMGjI9Zd@lx-t490> (raw)
In-Reply-To: <20230504213246.GB1666363@dev-arch.thelio-3990X>

Hi Nathan,

On Thu, 04 May 2023, Nathan Chancellor wrote:
>
> On Thu, May 04, 2023 at 10:18:33PM +0200, Ahmed S. Darwish wrote:
...
> > +	suffixparams=
> > +	if [ -v O ]; then
>
> I think
>
>   if [ -n "$O" ]; then
>
> would match the style preferred by Kbuild (though that is usually for
> portability sake, which probably does not matter here since bash is
> explicitly requested). Perhaps not worth addressing if there is no other
> reason for a v2.
>

Thanks, I'll do it. I've just discovered that a v2 is necessary anyway.

If O= has a "~", for example as in:

    make O=~/build/ gtags

the snippet below:

> > +		suffixparams="-C $tree $O"
> > +	fi
> > +	all_target_sources | gtags -i -f - $suffixparams
                                           ^
will fail since the "~" in the O= directory path won't get dereferenced
before getting passed to the gtags call (an eval is needed).

I'll submit a v2 shortly.

Kind regards,

--
Ahmed S. Darwish
Linutronix GmbH