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Date:      Sun, 3 May 2026 12:31:50 -0700
From:      Adrian Chadd <adrian@freebsd.org>
To:        Jessica Clarke <jrtc27@freebsd.org>
Cc:        "Stephen J. Kiernan" <stevek@freebsd.org>,  "src-committers@freebsd.org" <src-committers@freebsd.org>,  "dev-commits-src-all@freebsd.org" <dev-commits-src-all@freebsd.org>,  "dev-commits-src-main@freebsd.org" <dev-commits-src-main@freebsd.org>
Subject:   Re: git: 01674e15dedb - main - bsd.endian.mk: Optimize the handling of big/little endian determination.
Message-ID:  <CAJ-Vmo=A0s0XXvkmRziUT8Sn9KzOHsK_ZH7Ldyr4ZHitnO3tvQ@mail.gmail.com>
In-Reply-To: <6C5FEC1A-D8E1-45B8-A80A-B32F81392058@freebsd.org>
References:  <69f6b1ec.181e8.27d0b938@gitrepo.freebsd.org> <6C5FEC1A-D8E1-45B8-A80A-B32F81392058@freebsd.org>

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I just hit this too. can we revert the diff for now until we figure
out why it breaks ports building at least?


-a

On Sun, 3 May 2026 at 11:49, Jessica Clarke <jrtc27@freebsd.org> wrote:
>
> On 3 May 2026, at 03:24, Stephen J. Kiernan <stevek@freebsd.org> wrote:
> >
> > The branch main has been updated by stevek:
> >
> > URL: https://cgit.FreeBSD.org/src/commit/?id=01674e15dedb15f8ce498af0680c50bb075c5482
> >
> > commit 01674e15dedb15f8ce498af0680c50bb075c5482
> > Author:     Stephen J. Kiernan <stevek@FreeBSD.org>
> > AuthorDate: 2024-04-03 23:25:19 +0000
> > Commit:     Stephen J. Kiernan <stevek@FreeBSD.org>
> > CommitDate: 2026-05-03 02:21:56 +0000
> >
> >    bsd.endian.mk: Optimize the handling of big/little endian determination.
> >
> >    Add variables to contain lists of MACHINE_ARCH values to use
> >    to determine little or big endian.
> >
> >    Only error out about not being able to determine endianess if
> >    TARGET_ENDIANNESS is empty and not cross-compiling.
> >
> >    Reviewed by:    sjg
> >    Obtained from:  Hewlett Packard Enterprise Development LP
> >    Differential Revision:  https://reviews.freebsd.org/D44629
> > ---
> > share/mk/bsd.endian.mk | 39 +++++++++++++++++++++++++++++----------
> > 1 file changed, 29 insertions(+), 10 deletions(-)
> >
> > diff --git a/share/mk/bsd.endian.mk b/share/mk/bsd.endian.mk
> > index 0c5ebb7aeba2..2a617a1d2794 100644
> > --- a/share/mk/bsd.endian.mk
> > +++ b/share/mk/bsd.endian.mk
> > @@ -1,20 +1,35 @@
> >
> > -.if ${MACHINE_CPUARCH} == "aarch64" || \
> > -    ${MACHINE_CPUARCH} == "arm" || \
> > -    ${MACHINE_ARCH} == "amd64" || \
> > -    ${MACHINE_ARCH} == "i386" || \
> > -    ${MACHINE_ARCH} == "powerpc64le" || \
> > -    ${MACHINE_CPUARCH} == "riscv"
>
> Losing MACHINE_CPUARCH makes me sad as a downstream that adds new
> MACHINE_ARCH for aarch64 and riscv. For riscv at least it’s now riscv*
> which I guess is close enough, but for aarch64 it’s not wildcarded.
> Similarly arm though I don’t care about that personally.
>
> > +MACHINE_ARCH_LIST.little = \
> > + aarch64 \
> > + amd64 \
> > + armv7 \
> > + i386 \
> > + powerpc64le \
> > + riscv*
> > +
> > +MACHINE_ARCH_LIST.big = \
> > + powerpc \
> > + powerpc64
> > +
> > +.for e in big little
> > +N_$e:= ${MACHINE_ARCH_LIST.$e:${M_ListToSkip}}
>
> Should we be worried about catching MACHINE(_ARCH) being empty?
>
> Jessica
>
> > +.endfor
> > +
> > +# For the host, we need to look at the host architecture
> > +.if ${MACHINE:Nhost*} == ""
> > +_ENDIAN_ARCH=${_HOST_ARCH}
> > +.else
> > +_ENDIAN_ARCH=${MACHINE_ARCH}
> > +.endif
> > +
> > +.if ${_ENDIAN_ARCH:${N_little}} == ""
> > TARGET_ENDIANNESS= 1234
> > CAP_MKDB_ENDIAN= -l
> > LOCALEDEF_ENDIAN= -l
> > -.elif ${MACHINE_ARCH} == "powerpc" || \
> > -    ${MACHINE_ARCH} == "powerpc64"
> > +.elif ${_ENDIAN_ARCH:${N_big}} == ""
> > TARGET_ENDIANNESS= 4321
> > CAP_MKDB_ENDIAN= -b
> > LOCALEDEF_ENDIAN= -b
> > -.elif ${.MAKE.OS} == "FreeBSD"
> > -.error Don't know the endian of this architecture
> > .else
> > #
> > # During bootstrapping on !FreeBSD OSes, we need to define some value.  Short of
> > @@ -33,3 +48,7 @@ TARGET_ENDIANNESS= 1234
> > CAP_MKDB_ENDIAN= -B # Poisoned value, invalid flags for both cap_mkdb
> > LOCALEDEF_ENDIAN= -B # and localedef.
> > .endif
> > +
> > +.if empty(TARGET_ENDIANNESS) && ${.MAKE.OS} == "FreeBSD"
> > +.error Don't know the endianness of this architecture
> > +.endif
> >
>
>


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