* Fwd: All mips BSPs cannot link psxfenv01
[not found] ` <3c8f49af-2e7c-73e4-6d14-c8dff5a78e04@embedded-brains.de>
@ 2022-01-15 21:50 ` Joel Sherrill
2022-02-07 6:43 ` Mike Frysinger
0 siblings, 1 reply; 3+ messages in thread
From: Joel Sherrill @ 2022-01-15 21:50 UTC (permalink / raw)
To: Newlib
I'm forwarding a discussion between Sebastian Huber and myself. Looks like
the mips fenv.h support was broken recently.
Any ideas?
---------- Forwarded message ---------
From: Sebastian Huber <sebastian.huber@embedded-brains.de>
Date: Sat, Jan 15, 2022, 1:01 PM
Subject: Re: All mips BSPs cannot link psxfenv01
To: <joel@rtems.org>
Cc: RTEMS <devel@rtems.org>
On 14/01/2022 17:51, Joel Sherrill wrote:
>> Is this due to the recent Newlib build system changes?
> I guess so although I don't see anything obvious when I
> looked at the machine/configure.ac in both versions.
>
> I confirmed jmr3904 could build all tests with this gcc/newlib:
>
> $ ~/rtems-work/tools/6/bin/mips-rtems6-gcc --version
> mips-rtems6-gcc (GCC) 10.3.1 20211214 (RTEMS 6, RSB
> bb9e049b103f3a47019a6cfad18e2b59c9e9ea97, Newlib eb03ac1)
>
> That should have been the immediately previous version.
It is probably this change:
commit 8fa73a9f8414a4926365324c2fe32a237c2eb91d
Author: Jeff Johnston <jjohnstn@redhat.com>
Date: Mon Nov 29 17:33:52 2021 -0500
Modifying patch from: marian.buschsieweke@ovgu.de
The code accessing the floating point control/status register, namely
#define __cfc1(__fcsr) __asm __volatile("cfc1 %0, $31" :
"=r" (__fcsr)
does not compile with mips16. This changed the makefile to pass
-mno-mips16 to avoid the following
compiler error:
mips-mti-elf fails with "Error: unrecognized opcode `cfc1
$3,$31'"
I have no time to dig into the Newlib build system.
--
embedded brains GmbH
Herr Sebastian HUBER
Dornierstr. 4
82178 Puchheim
Germany
email: sebastian.huber@embedded-brains.de
phone: +49-89-18 94 741 - 16
fax: +49-89-18 94 741 - 08
Registergericht: Amtsgericht München
Registernummer: HRB 157899
Vertretungsberechtigte Geschäftsführer: Peter Rasmussen, Thomas Dörfler
Unsere Datenschutzerklärung finden Sie hier:
https://embedded-brains.de/datenschutzerklaerung/
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: All mips BSPs cannot link psxfenv01
2022-01-15 21:50 ` Fwd: All mips BSPs cannot link psxfenv01 Joel Sherrill
@ 2022-02-07 6:43 ` Mike Frysinger
2022-02-07 14:29 ` Sebastian Huber
0 siblings, 1 reply; 3+ messages in thread
From: Mike Frysinger @ 2022-02-07 6:43 UTC (permalink / raw)
To: Joel Sherrill; +Cc: Newlib
[-- Attachment #1: Type: text/plain, Size: 2428 bytes --]
On 15 Jan 2022 15:50, Joel Sherrill wrote:
> I'm forwarding a discussion between Sebastian Huber and myself. Looks like
> the mips fenv.h support was broken recently.
>
> Any ideas?
i happened to notice the same weirdness when rewriting the autotools logic.
looks like it's due to this patch:
https://sourceware.org/pipermail/newlib/2021/018726.html
i cc-ed you on the thread with a possible fix if you want to give it a try.
-mike
> ---------- Forwarded message ---------
> From: Sebastian Huber <sebastian.huber@embedded-brains.de>
> Date: Sat, Jan 15, 2022, 1:01 PM
> Subject: Re: All mips BSPs cannot link psxfenv01
> To: <joel@rtems.org>
> Cc: RTEMS <devel@rtems.org>
>
>
> On 14/01/2022 17:51, Joel Sherrill wrote:
> >> Is this due to the recent Newlib build system changes?
> > I guess so although I don't see anything obvious when I
> > looked at the machine/configure.ac in both versions.
> >
> > I confirmed jmr3904 could build all tests with this gcc/newlib:
> >
> > $ ~/rtems-work/tools/6/bin/mips-rtems6-gcc --version
> > mips-rtems6-gcc (GCC) 10.3.1 20211214 (RTEMS 6, RSB
> > bb9e049b103f3a47019a6cfad18e2b59c9e9ea97, Newlib eb03ac1)
> >
> > That should have been the immediately previous version.
>
> It is probably this change:
>
> commit 8fa73a9f8414a4926365324c2fe32a237c2eb91d
> Author: Jeff Johnston <jjohnstn@redhat.com>
> Date: Mon Nov 29 17:33:52 2021 -0500
>
> Modifying patch from: marian.buschsieweke@ovgu.de
>
> The code accessing the floating point control/status register, namely
>
> #define __cfc1(__fcsr) __asm __volatile("cfc1 %0, $31" :
> "=r" (__fcsr)
>
> does not compile with mips16. This changed the makefile to pass
> -mno-mips16 to avoid the following
> compiler error:
>
> mips-mti-elf fails with "Error: unrecognized opcode `cfc1
> $3,$31'"
>
> I have no time to dig into the Newlib build system.
>
> --
> embedded brains GmbH
> Herr Sebastian HUBER
> Dornierstr. 4
> 82178 Puchheim
> Germany
> email: sebastian.huber@embedded-brains.de
> phone: +49-89-18 94 741 - 16
> fax: +49-89-18 94 741 - 08
>
> Registergericht: Amtsgericht München
> Registernummer: HRB 157899
> Vertretungsberechtigte Geschäftsführer: Peter Rasmussen, Thomas Dörfler
> Unsere Datenschutzerklärung finden Sie hier:
> https://embedded-brains.de/datenschutzerklaerung/
[-- Attachment #2: signature.asc --]
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^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: All mips BSPs cannot link psxfenv01
2022-02-07 6:43 ` Mike Frysinger
@ 2022-02-07 14:29 ` Sebastian Huber
0 siblings, 0 replies; 3+ messages in thread
From: Sebastian Huber @ 2022-02-07 14:29 UTC (permalink / raw)
To: Newlib
On 07/02/2022 07:43, Mike Frysinger wrote:
> On 15 Jan 2022 15:50, Joel Sherrill wrote:
>> I'm forwarding a discussion between Sebastian Huber and myself. Looks like
>> the mips fenv.h support was broken recently.
>>
>> Any ideas?
> i happened to notice the same weirdness when rewriting the autotools logic.
> looks like it's due to this patch:
> https://sourceware.org/pipermail/newlib/2021/018726.html
Yes, this is also my guess.
>
> i cc-ed you on the thread with a possible fix if you want to give it a try.
I checked the latest Newlib master and the fenv objects are still empty.
--
embedded brains GmbH
Herr Sebastian HUBER
Dornierstr. 4
82178 Puchheim
Germany
email: sebastian.huber@embedded-brains.de
phone: +49-89-18 94 741 - 16
fax: +49-89-18 94 741 - 08
Registergericht: Amtsgericht München
Registernummer: HRB 157899
Vertretungsberechtigte Geschäftsführer: Peter Rasmussen, Thomas Dörfler
Unsere Datenschutzerklärung finden Sie hier:
https://embedded-brains.de/datenschutzerklaerung/
^ permalink raw reply [flat|nested] 3+ messages in thread
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2022-01-15 21:50 ` Fwd: All mips BSPs cannot link psxfenv01 Joel Sherrill
2022-02-07 6:43 ` Mike Frysinger
2022-02-07 14:29 ` Sebastian Huber
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