Date: Sat, 11 Aug 2018 19:01:13 +0000 From: Mark Millard <mark.millard@nexustechnology.com> To: Warner Losh <imp@bsdimp.com> Cc: Dimitry Andric <dim@FreeBSD.org>, "freebsd-toolchain@FreeBSD.org" <freebsd-toolchain@freebsd.org> Subject: Re: Broken arm support in clang now? Message-ID: <8B467E75-A6D3-41A5-8EA1-4DDFE0E14CC5@nexustechnology.com> In-Reply-To: <A5B46840-B508-4F40-9EFD-50D0439EBAC7@FreeBSD.org> References: <CANCZdfpmDN-nAkViuEx-tKpPhOdRYX=xNu6s8E2o6F4xC2WPnA@mail.gmail.com> <1880880F-9D9D-47E0-A7A4-5369A3770F89@FreeBSD.org> <CANCZdfpF9ND_k2xvZrsDebsZ07p2RU0Lebp5GDtmxnjdXc=N-A@mail.gmail.com> <A5B46840-B508-4F40-9EFD-50D0439EBAC7@FreeBSD.org>
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On 2018-Aug-11, at 11:09 AM, Dimitry Andric <dim at FreeBSD.org> wrote:
>=20
> On 11 Aug 2018, at 19:31, Warner Losh <imp at bsdimp.com> wrote:
>>=20
>> On Sat, Aug 11, 2018, 10:20 AM Dimitry Andric <dim@freebsd.org> =
wrote:
>> On 11 Aug 2018, at 16:55, Warner Losh <imp@bsdimp.com> wrote:
>>>=20
>>> It looks like armv5 clang bogusly uses lld:
>>>=20
>>> =46rom a 'make buildkernel' of the RT1310 kernel config:
>>>=20
>>> cc -target arm-gnueabi-freebsd12.0
> ...
>>> ld: warning: lld uses extended branch encoding, no object with =
architecture
>>> supporting feature detected.
>>> ld: warning: lld may use movt/movw, no object with architecture =
supporting
>>> feature detected.
> ...
Did the build get either of the below notices? Both?
make[1]: "/usr/src/Makefile.inc1" line 341: SYSTEM_COMPILER: Determined =
that CC=3Dcc matches the source tree. Not bootstrapping a =
cross-compiler.
make[1]: "/usr/src/Makefile.inc1" line 346: SYSTEM_LINKER: Determined =
that LD=3Dld matches the source tree. Not bootstrapping a cross-linker.
?
(The example text was taken from an amd64 -> aarch64 cross build.)
>> Host is amd64. Target is arm. No src.conf. Did a full buildworld =
TARGET=3Darm a few days ago. /usr/bin/ld is lld.
>=20
> Okay, so in the above "cc" command, can you somehow figure out which =
cc
> executable it is using? And please add a -v to the "linking =
kernel.full"
> command line, so it shows exactly which linker it runs?
>=20
> I have the idea that it is preferring your /usr/bin/ld over
> ${WORLDTMP}/usr/bin/ld...
=3D=3D=3D
Mark Millard
Nexus Technology, Inc.=20
78 Northeastern Blvd., Unit #2=20
Nashua NH 03062
877-595-8116 x821
mark.millard@nexustechnology.com
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