Re: [OE-core] [RFC PATCH 3/5] musl: set compatibility a bit more flexible

[Denys Dmytriyenko <denis@denix.org>]

On Wed, Oct 01, 2025 at 07:12:34PM -0700, Khem Raj wrote:
> On Wed, Oct 1, 2025 at 5:08 PM Denys Dmytriyenko via
> lists.openembedded.org <denis=denix.org@lists.openembedded.org> wrote:
> >
> > From: Denys Dmytriyenko <denys@konsulko.com>
> >
> > Like musl Linux config, baremetal also uses musl as a libc, but
> > it has a different host triplet set. Hence adjust COMPATIBLE_HOST
> > to accomodate this use case by checking that musl is a preferred
> > provider of libc.
> 
> This sounds a bit odd. Why do we use musl for baremetal targets ?

Was like that for 10 years since the beginning of baremetal support:
https://git.openembedded.org/openembedded-core/commit/?id=cb010e306a6a856c589db5f41fdcaea4e5035d93


> while musl does have FDPIC support but I don't think thats how we
> use it.
> 
> >
> > [YOCTO #15982]
> >
> > Signed-off-by: Denys Dmytriyenko <denys@konsulko.com>
> > ---
> >  meta/recipes-core/musl/bsd-headers.bb      | 2 +-
> >  meta/recipes-core/musl/libssp-nonshared.bb | 3 ++-
> >  2 files changed, 3 insertions(+), 2 deletions(-)
> >
> > diff --git a/meta/recipes-core/musl/bsd-headers.bb b/meta/recipes-core/musl/bsd-headers.bb
> > index ad9ba81e4f..c6a3814a49 100644
> > --- a/meta/recipes-core/musl/bsd-headers.bb
> > +++ b/meta/recipes-core/musl/bsd-headers.bb
> > @@ -25,7 +25,7 @@ do_install() {
> >  #
> >  # We will skip parsing for non-musl systems
> >  #
> > +COMPATIBLE_HOST = "${@oe.utils.conditional('PREFERRED_PROVIDER_virtual/libc', 'musl', '.*', 'null', d)}"
> >
> > -COMPATIBLE_HOST = ".*-musl.*"
> >  DEV_PKG_DEPENDENCY = ""
> >  RRECOMMENDS:${PN}-dbg = "${PN}-dev (= ${EXTENDPKGV})"
> > diff --git a/meta/recipes-core/musl/libssp-nonshared.bb b/meta/recipes-core/musl/libssp-nonshared.bb
> > index 4bcbaef7ea..6f12ff0c9b 100644
> > --- a/meta/recipes-core/musl/libssp-nonshared.bb
> > +++ b/meta/recipes-core/musl/libssp-nonshared.bb
> > @@ -29,7 +29,8 @@ do_install() {
> >  #
> >  # We will skip parsing for non-musl systems
> >  #
> > -COMPATIBLE_HOST = ".*-musl.*"
> > +COMPATIBLE_HOST = "${@oe.utils.conditional('PREFERRED_PROVIDER_virtual/libc', 'musl', '.*', 'null', d)}"
> > +
> >  RDEPENDS:${PN}-staticdev = ""
> >  DEV_PKG_DEPENDENCY = ""
> >  RRECOMMENDS:${PN}-dbg = "${PN}-staticdev (= ${EXTENDPKGV})"
> > --
> > 2.25.1