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

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Message-ID: <c7jdqfgb2cavfvu2obojgbccq56cevd5ojaiptp3riz5sxebhh@k4bk3vv6f3jv>
Date: Tue, 20 Aug 2024 08:28:53 -0600
From: Jose Fernandez <jose.fernandez@...ux.dev>
To: Masahiro Yamada <masahiroy@...nel.org>
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 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.

> > +
> > +       cd "${objtree}"
> > +       mkdir -p "$pkgdir/usr/src/debug/${pkgbase}"
> > +       install -Dt "$pkgdir/usr/src/debug/${pkgbase}" -m644 vmlinux
> > +}
> > +
> >  for _p in "${pkgname[@]}"; do
> >         eval "package_$_p() {
> >                 $(declare -f "_package${_p#$pkgbase}")
> >
> > base-commit: 869679673d3bbaaf1c2a43dba53930f5241e1d30
> > --
> > 2.46.0
> >
> >
> 
> 
> -- 
> Best Regards
> Masahiro Yamada