Compiling sparc/leon3 with clang

[Gedare Bloom]

On Wed, Jul 31, 2019 at 10:03 AM Joel Sherrill <joel at rtems.org> wrote:
>
>
>
> On Wed, Jul 31, 2019 at 10:52 AM Gedare Bloom <gedare at rtems.org> wrote:
>>
>> On Tue, Jul 30, 2019 at 11:09 PM Sebastian Huber
>> <sebastian.huber at embedded-brains.de> wrote:
>> >
>> > On 31/07/2019 01:23, Gedare Bloom wrote:
>> > > Hello folks,
>> > >
>> > > I'm trying to compile leon3 with clang, because I'm under the
>> > > impression it should be possible. I got as far as
>> > > mv -f base_sp/.deps/base_sp-apptask.Tpo base_sp/.deps/base_sp-apptask.Po
>> > > clang -target sparc-rtems5 -ccc-gcc-name sparc-rtems5-gcc
>> > > -mcpu=leon3 -O2 -g -ffunction-sections -fdata-sections -Wall
>> > > -Wmissing-prototypes -Wimplicit-function-declaration
>> > > -Wstrict-prototypes -Wnested-externs -B./../../lib/libbsp/sparc/leon3
>> > > -B/mnt/devel/rtems/rtems/bsps/sparc/leon3/start -qrtems
>> > > -L./../../cpukit -L/mnt/devel/rtems/rtems/bsps/sparc/shared/start
>> > > -Wl,--wrap=printf -Wl,--wrap=puts -Wl,--wrap=putchar -Wl,--gc-sections
>> > > -o base_sp.exe base_sp/base_sp-init.o base_sp/base_sp-apptask.o
>> > > ./../../lib/libbsp/sparc/leon3/librtemsbsp.a
>> > > ./../../cpukit/librtemscpu.a ./../../cpukit/librtemstest.a
>> > > clang-10: error: unknown argument: '-qrtems'
>> > > Makefile:665: recipe for target 'base_sp.exe' failed
>> > > make[5]: *** [base_sp.exe] Error 1
>> > > make[5]: Leaving directory
>> > > '/mnt/devel/rtems/builds/b-erc32-clang/sparc-rtems5/c/leon3/testsuites/samples'
>> > >
>> > > Any advice how to get past this qrtems error?
>> >
>> > The -qrtems is an RTEMS-specific GCC option.  See also:
>> >
>> > https://lists.rtems.org/pipermail/devel/2018-September/023095.html
>> > https://lists.rtems.org/pipermail/devel/2019-June/026396.html
>> >
>> I don't see any resolution from this matter. Is there a path forward,
>> or what is the hard part?
>
>
> The Gaisler folks did the work and had the sparc BSPs building. Not sure what
> the missing bits are but they should know.
>
I suspect they have modified llvm/clang frontend slightly, to deal
with this qrtems... I downloaded the RCC-1.3 and will try that
out-of-box to see if it succeeds or not. I couldn't see any
source/patches for llvm/clang so not really sure. Hopefully they can
comment whether there are changes that have to be made.

> --joel
>>
>>
>> -Gedare
>>
>> > --
>> > Sebastian Huber, embedded brains GmbH
>> >
>> > Address : Dornierstr. 4, D-82178 Puchheim, Germany
>> > Phone   : +49 89 189 47 41-16
>> > Fax     : +49 89 189 47 41-09
>> > E-Mail  : sebastian.huber at embedded-brains.de
>> > PGP     : Public key available on request.
>> >
>> > Diese Nachricht ist keine geschäftliche Mitteilung im Sinne des EHUG.
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