Date: Sat, 4 Nov 2017 17:14:56 -0700 From: Mark Millard <markmi@dsl-only.net> To: Gerald Pfeifer <gerald@pfeifer.com> Cc: =?utf-8?Q?Eddy_Petri=C8=99or?= <eddy.petrisor@gmail.com>, freebsd-arm@freebsd.org, freebsd-toolchain@freebsd.org, Dimitry Andric <dim@freebsd.org> Subject: Re: [toolchain] lib/clan/llvm.build.mk: Shouldn't BUILD_TRIPLE definition rely host 'cc -dumpmachine'? Message-ID: <505436FF-E15C-42DE-8855-47FB5A99E64B@dsl-only.net> In-Reply-To: <alpine.LSU.2.21.1711042354060.4053@anthias.pfeifer.com> References: <CAK0XTWczya8vg_sQZPqz-ZyYZRMq1v6p%2Bjs90S%2BjaDHxo2=1gA@mail.gmail.com> <CDAA0CB5-F1FC-40FE-AEC5-56FD64654671@FreeBSD.org> <7CAFD8CC-BDA1-4E89-BD7E-D0089E27036F@dsl-only.net> <CAK0XTWdRjek6StRktBfn0oGMo1ixTohs6NPoyDx__QMQ56ki_g@mail.gmail.com> <alpine.LSU.2.21.1711042354060.4053@anthias.pfeifer.com>
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On 2017-Nov-4, at 3:57 PM, Gerald Pfeifer <gerald at pfeifer.com> wrote:
> On Sun, 29 Oct 2017, Eddy Petri=C8=99or wrote:
>> Yep --and it is even more complicated: gcc vs. clang are sometimes=20
>> different for the target listed. . .
>>=20
>> For example -m32 for amd64 changes the clang result:
>>=20
>> # clang -dumpmachine
>> x86_64-unknown-freebsd12.0
>>=20
>> ..
>>=20
>> # gcc7 -dumpmachine
>> x86_64-portbld-freebsd12.0
>=20
> That's not actually related to GCC, but the lang/gcc* ports using
> the FreeBSD Ports Collection's default that explicitly set
>=20
> CONFIGURE_TARGET?=3D ${ARCH}-portbld-${OPSYS:tl}${OSREL}
>=20
> By default GCC would use the same as clang.
Interesting. Good to know. Thanks.
We still end up with depending on --dumpmachine giving
non-uniform results across typical compilers in a
standard FreeBSD environment. It looks like depending
on -dumpmachine should be avoided for any more than a
local workaround.
(Some Linux distributions might also vary such
definitions to be non-default as well for all
I know.)
=3D=3D=3D
Mark Millard
markmi at dsl-only.net
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