Broken arm support in clang now?
Mark Millard
mark.millard at nexustechnology.com
Sat Aug 11 19:01:16 UTC 2018
On 2018-Aug-11, at 11:09 AM, Dimitry Andric <dim at FreeBSD.org> wrote:
>
> On 11 Aug 2018, at 19:31, Warner Losh <imp at bsdimp.com> wrote:
>>
>> On Sat, Aug 11, 2018, 10:20 AM Dimitry Andric <dim at freebsd.org> wrote:
>> On 11 Aug 2018, at 16:55, Warner Losh <imp at bsdimp.com> wrote:
>>>
>>> It looks like armv5 clang bogusly uses lld:
>>>
>>> From a 'make buildkernel' of the RT1310 kernel config:
>>>
>>> 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=cc matches the source tree. Not bootstrapping a cross-compiler.
make[1]: "/usr/src/Makefile.inc1" line 346: SYSTEM_LINKER: Determined that LD=ld 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=arm a few days ago. /usr/bin/ld is lld.
>
> 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?
>
> I have the idea that it is preferring your /usr/bin/ld over
> ${WORLDTMP}/usr/bin/ld...
===
Mark Millard
Nexus Technology, Inc.
78 Northeastern Blvd., Unit #2
Nashua NH 03062
877-595-8116 x821
mark.millard at nexustechnology.com
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