linux-kernel - Re: [PATCH v2] kbuild: add debug package to pacman PKGBUILD

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Message-ID: <CAK7LNASckKS3b-kOSFuVqPfu5Qx7DEX6HU7dqrivCzT-rGh8WQ@mail.gmail.com>
Date: Fri, 23 Aug 2024 21:42:07 +0900
From: Masahiro Yamada <masahiroy@...nel.org>
To: Jose Fernandez <jose.fernandez@...ux.dev>
Cc: Thomas Weißschuh <linux@...ssschuh.net>, 
	Christian Heusel <christian@...sel.eu>, Nathan Chancellor <nathan@...nel.org>, 
	Nicolas Schier <nicolas@...sle.eu>, Peter Jung <ptr1337@...hyos.org>, linux-kbuild@...r.kernel.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] kbuild: add debug package to pacman PKGBUILD

On Tue, Aug 20, 2024 at 11:29 PM Jose Fernandez
<jose.fernandez@...ux.dev> wrote:
>
> On 24/08/18 09:35PM, Masahiro Yamada wrote:
> > On Sun, Aug 18, 2024 at 12:12 AM Jose Fernandez
> > <jose.fernandez@...ux.dev> wrote:
> > >
> > > Add a new debug package to the PKGBUILD for the pacman-pkg target. The
> > > debug package includes the non-stripped vmlinux file, providing access
> > > to debug symbols needed for kernel debugging and profiling. The vmlinux
> > > file will be installed to /usr/src/debug/${pkgbase}. The debug package
> > > will be built by default and can be excluded by overriding PACMAN_EXTRAPACKAGES.
> > >
> > > Signed-off-by: Jose Fernandez <jose.fernandez@...ux.dev>
> > > Reviewed-by: Peter Jung <ptr1337@...hyos.org>
> > > ---
> > > v1->v2:
> > > - Use the new PACMAN_EXTRAPACKAGES [1] variable to allow users to disable the
> > > debug package if desired, instead of always including it.
> > >
> > > [1] https://lore.kernel.org/lkml/20240813185900.GA140556@thelio-3990X/T/
> > >
> > >  scripts/package/PKGBUILD | 11 ++++++++++-
> > >  1 file changed, 10 insertions(+), 1 deletion(-)
> > >
> > > diff --git a/scripts/package/PKGBUILD b/scripts/package/PKGBUILD
> > > index fbd7eb10a52c..d40d282353de 100644
> > > --- a/scripts/package/PKGBUILD
> > > +++ b/scripts/package/PKGBUILD
> > > @@ -5,7 +5,7 @@
> > >  pkgbase=${PACMAN_PKGBASE:-linux-upstream}
> > >  pkgname=("${pkgbase}")
> > >
> > > -_extrapackages=${PACMAN_EXTRAPACKAGES-headers api-headers}
> > > +_extrapackages=${PACMAN_EXTRAPACKAGES-headers api-headers debug}
> > >  for pkg in $_extrapackages; do
> > >         pkgname+=("${pkgbase}-${pkg}")
> > >  done
> > > @@ -106,6 +106,15 @@ _package-api-headers() {
> > >         ${MAKE} headers_install INSTALL_HDR_PATH="${pkgdir}/usr"
> > >  }
> > >
> > > +_package-debug(){
> > > +       pkgdesc="Non-stripped vmlinux file for the ${pkgdesc} kernel"
> > > +       depends=(${pkgbase}-headers)
> >
> >
> > Why is this dependency necessary?
> >
> Hi Masahiro,
> My thinking was that you may need System.map in combination with vmlinux for
> debugging with tools like crash. I don't have a strong opinions on this, so I'm
> I can remove it if you or others think it's not necessary.


It is better to not add unnecessary code.




-- 
Best Regards
Masahiro Yamada