[U-Boot] CONFIG_API, EABI and raise()

[U-Boot] CONFIG_API, EABI and raise()

[Piotr Zięcik]

Hi.

While working on U-Boot for our board we have found problem related to 
CONFIG_API option. In general, enabling it causes build failure. Our tests 
showed that problem exists also on other ARM U-Boot targets (for example 
davinci_dvevm).

Do you think that this problem may be caused by your libgcc-related cleanups ?
If so, do you have any idea how to fix it ?

Failing Build log:
arm-ld crt0.o -Ttext 0x1000000 \
                        -o demo demo.o libglue.a \
                        -L/home/services/eldk/4.2/arm/usr/bin/../lib/gcc/arm-linux-gnueabi/4.2.2 -lgcc
arm-ld: ERROR: Source 
object /home/services/eldk/4.2/arm/usr/bin/../lib/gcc/arm-linux-gnueabi/4.2.2/libgcc.a(_udivsi3.o) 
has EABI version 4, but target demo has EABI version 0
arm-ld: failed to merge target specific data of 
file /home/services/eldk/4.2/arm/usr/bin/../lib/gcc/arm-linux-gnueabi/4.2.2/libgcc.a(_udivsi3.o)
arm-ld: ERROR: Source 
object /home/services/eldk/4.2/arm/usr/bin/../lib/gcc/arm-linux-gnueabi/4.2.2/libgcc.a(_umodsi3.o) 
has EABI version 4, but target demo has EABI version 0
arm-ld: failed to merge target specific data of 
file /home/services/eldk/4.2/arm/usr/bin/../lib/gcc/arm-linux-gnueabi/4.2.2/libgcc.a(_umodsi3.o)
arm-ld: ERROR: Source 
object /home/services/eldk/4.2/arm/usr/bin/../lib/gcc/arm-linux-gnueabi/4.2.2/libgcc.a(_dvmd_lnx.o) 
has EABI version 4, but target demo has EABI version 0
arm-ld: failed to merge target specific data of 
file /home/services/eldk/4.2/arm/usr/bin/../lib/gcc/arm-linux-gnueabi/4.2.2/libgcc.a(_dvmd_lnx.o)
/home/services/eldk/4.2/arm/usr/bin/../lib/gcc/arm-linux-gnueabi/4.2.2/libgcc.a(_dvmd_lnx.o): 
In function `__div0':
/opt/eldk/build/arm-2008-11-24/work/usr/src/denx/BUILD/crosstool-0.43/build/gcc-4.2.2-glibc-20070515T2025-eldk/arm-linux-gnueabi/gcc-4.2.2/gcc/config/arm/lib1funcs.asm:1000: 
undefined reference to `raise'

-- 
Best Regards,
Piotr Zi?cik

[U-Boot] CONFIG_API, EABI and raise()

[Mike Frysinger]

On Tuesday 14 July 2009 09:47:26 Piotr Zi?cik wrote:
> While working on U-Boot for our board we have found problem related to
> CONFIG_API option. In general, enabling it causes build failure. Our tests
> showed that problem exists also on other ARM U-Boot targets (for example
> davinci_dvevm).
>
> Do you think that this problem may be caused by your libgcc-related
> cleanups ? If so, do you have any idea how to fix it ?

sounds more like it's always been a bug, but Jean's cleanup will fix it 
eventually
-mike
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[U-Boot] CONFIG_API, EABI and raise()

[Stefan Roese]

On Wednesday 15 July 2009 16:58:40 Mike Frysinger wrote:
> On Tuesday 14 July 2009 09:47:26 Piotr Zi?cik wrote:
> > While working on U-Boot for our board we have found problem related to
> > CONFIG_API option. In general, enabling it causes build failure. Our
> > tests showed that problem exists also on other ARM U-Boot targets (for
> > example davinci_dvevm).
> >
> > Do you think that this problem may be caused by your libgcc-related
> > cleanups ? If so, do you have any idea how to fix it ?
>
> sounds more like it's always been a bug, but Jean's cleanup will fix it
> eventually

That's my understanding too.

I vote for accepting Jean-Christophe's libgcc patches in the latest version. 
They definitely fix some ugly problems seen on ARM (build failures, etc) and 
make life easier.

Best regards,
Stefan

=====================================================================
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-0 Fax: +49-8142-66989-80  Email: office at denx.de
=====================================================================

[U-Boot] CONFIG_API, EABI and raise()

[Wolfgang Denk]

Dear Stefan Roese,

In message <200907151710.04262.sr@denx.de> you wrote:
>
> I vote for accepting Jean-Christophe's libgcc patches in the latest version. 
> They definitely fix some ugly problems seen on ARM (build failures, etc) and 
> make life easier.

They have been rejected, and I will not acept them in their current
form. See the previous diuscussion about the subject. 

Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
As far as the laws of mathematics refer  to  reality,  they  are  not
certain;  and  as  far  as  they  are  certain,  they do not refer to
reality.                                           -- Albert Einstein

[U-Boot] CONFIG_API, EABI and raise()

[Stefan Roese]

Hi Wolfgang,

On Wednesday 15 July 2009 17:12:57 Wolfgang Denk wrote:
> > I vote for accepting Jean-Christophe's libgcc patches in the latest
> > version. They definitely fix some ugly problems seen on ARM (build
> > failures, etc) and make life easier.
>
> They have been rejected, and I will not acept them in their current
> form. See the previous diuscussion about the subject.

What a pity! :-(

Best regards,
Stefan

=====================================================================
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-0 Fax: +49-8142-66989-80  Email: office at denx.de
=====================================================================

[U-Boot] CONFIG_API, EABI and raise()

[Rafal Jaworowski]

On 2009-07-15, at 16:58, Mike Frysinger wrote:

> On Tuesday 14 July 2009 09:47:26 Piotr Zi?cik wrote:
>> While working on U-Boot for our board we have found problem related  
>> to
>> CONFIG_API option. In general, enabling it causes build failure.  
>> Our tests
>> showed that problem exists also on other ARM U-Boot targets (for  
>> example
>> davinci_dvevm).
>>
>> Do you think that this problem may be caused by your libgcc-related
>> cleanups ? If so, do you have any idea how to fix it ?
>
> sounds more like it's always been a bug, but Jean's cleanup will fix  
> it
> eventually

CONFIG_API worked fine for ARM builds some time ago, and this breakage  
seems like a recent development.

Rafal

[U-Boot] CONFIG_API, EABI and raise()

[Mike Frysinger]

On Wednesday 15 July 2009 11:15:46 Rafal Jaworowski wrote:
> On 2009-07-15, at 16:58, Mike Frysinger wrote:
> > On Tuesday 14 July 2009 09:47:26 Piotr Zi?cik wrote:
> >> While working on U-Boot for our board we have found problem related
> >> to CONFIG_API option. In general, enabling it causes build failure.
> >> Our tests showed that problem exists also on other ARM U-Boot targets 
> >> (for example davinci_dvevm).
> >>
> >> Do you think that this problem may be caused by your libgcc-related
> >> cleanups ? If so, do you have any idea how to fix it ?
> >
> > sounds more like it's always been a bug, but Jean's cleanup will fix
> > it eventually
>
> CONFIG_API worked fine for ARM builds some time ago, and this breakage
> seems like a recent development.

or, it still works fine if your toolchain doesnt suck and isnt broken
-mike
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[U-Boot] CONFIG_API, EABI and raise()

[Rafal Jaworowski]

On 2009-07-15, at 18:09, Mike Frysinger wrote:

> On Wednesday 15 July 2009 11:15:46 Rafal Jaworowski wrote:
>> On 2009-07-15, at 16:58, Mike Frysinger wrote:
>>> On Tuesday 14 July 2009 09:47:26 Piotr Zi?cik wrote:
>>>> While working on U-Boot for our board we have found problem related
>>>> to CONFIG_API option. In general, enabling it causes build failure.
>>>> Our tests showed that problem exists also on other ARM U-Boot  
>>>> targets
>>>> (for example davinci_dvevm).
>>>>
>>>> Do you think that this problem may be caused by your libgcc-related
>>>> cleanups ? If so, do you have any idea how to fix it ?
>>>
>>> sounds more like it's always been a bug, but Jean's cleanup will fix
>>> it eventually
>>
>> CONFIG_API worked fine for ARM builds some time ago, and this  
>> breakage
>> seems like a recent development.
>
> or, it still works fine if your toolchain doesnt suck and isnt broken

The toolchain is ELDK 4.2 and has worked fine for longer time.

Rafal

[U-Boot] CONFIG_API, EABI and raise()

[Stefan Roese]

Hi Rafal,

On Thursday 16 July 2009 10:37:34 Rafal Jaworowski wrote:
> On 2009-07-15, at 18:09, Mike Frysinger wrote:
> > On Wednesday 15 July 2009 11:15:46 Rafal Jaworowski wrote:
> >> On 2009-07-15, at 16:58, Mike Frysinger wrote:
> >>> On Tuesday 14 July 2009 09:47:26 Piotr Zi?cik wrote:
> >>>> While working on U-Boot for our board we have found problem related
> >>>> to CONFIG_API option. In general, enabling it causes build failure.
> >>>> Our tests showed that problem exists also on other ARM U-Boot
> >>>> targets
> >>>> (for example davinci_dvevm).
> >>>>
> >>>> Do you think that this problem may be caused by your libgcc-related
> >>>> cleanups ? If so, do you have any idea how to fix it ?
> >>>
> >>> sounds more like it's always been a bug, but Jean's cleanup will fix
> >>> it eventually
> >>
> >> CONFIG_API worked fine for ARM builds some time ago, and this
> >> breakage
> >> seems like a recent development.
> >
> > or, it still works fine if your toolchain doesnt suck and isnt broken
>
> The toolchain is ELDK 4.2 and has worked fine for longer time.

Just to make it clear: The libgcc removal patches for ARM from Jean-Christophe 
are not added yet. So if you see a problem with EABI etc, some other patches 
have to be the reason for this. And very likely Jean-Christophe's patches 
could fix the problems.

Best regards,
Stefan

=====================================================================
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-0 Fax: +49-8142-66989-80  Email: office at denx.de
=====================================================================

[U-Boot] CONFIG_API, EABI and raise()

[Rafal Jaworowski]

Hi Stefan,

On 2009-07-16, at 10:46, Stefan Roese wrote:

> On Thursday 16 July 2009 10:37:34 Rafal Jaworowski wrote:
>> On 2009-07-15, at 18:09, Mike Frysinger wrote:
>>> On Wednesday 15 July 2009 11:15:46 Rafal Jaworowski wrote:
>>>> On 2009-07-15, at 16:58, Mike Frysinger wrote:
>>>>> On Tuesday 14 July 2009 09:47:26 Piotr Zi?cik wrote:
>>>>>> While working on U-Boot for our board we have found problem  
>>>>>> related
>>>>>> to CONFIG_API option. In general, enabling it causes build  
>>>>>> failure.
>>>>>> Our tests showed that problem exists also on other ARM U-Boot
>>>>>> targets
>>>>>> (for example davinci_dvevm).
>>>>>>
>>>>>> Do you think that this problem may be caused by your libgcc- 
>>>>>> related
>>>>>> cleanups ? If so, do you have any idea how to fix it ?
>>>>>
>>>>> sounds more like it's always been a bug, but Jean's cleanup will  
>>>>> fix
>>>>> it eventually
>>>>
>>>> CONFIG_API worked fine for ARM builds some time ago, and this
>>>> breakage
>>>> seems like a recent development.
>>>
>>> or, it still works fine if your toolchain doesnt suck and isnt  
>>> broken
>>
>> The toolchain is ELDK 4.2 and has worked fine for longer time.
>
> Just to make it clear: The libgcc removal patches for ARM from Jean- 
> Christophe
> are not added yet. So if you see a problem with EABI etc, some other  
> patches
> have to be the reason for this. And very likely Jean-Christophe's  
> patches
> could fix the problems.

Thanks for pointing this out, we'll look into it some more (I'm all  
for removing libgcc dependency, but was under the impression that  
parts of this rework was already included in main line, and thought  
there might be some loose ends or so).

Rafal

[U-Boot] CONFIG_API, EABI and raise()

[Wolfgang Denk]

Dear Stefan Roese,

In message <200907161046.32385.sr@denx.de> you wrote:
> 
> Just to make it clear: The libgcc removal patches for ARM from Jean-Christophe
> are not added yet. ...

Just to make it clear: The libgcc removal patches for ARM will never
be added - at least not in their current form.

>                ... So if you see a problem with EABI etc, some other patches
> have to be the reason for this. And very likely Jean-Christophe's patches
> could fix the problems.

Instead af waiting for some potetnial fix that mauy or may not
accepted at an unknown (but later) time, we should focus on
identifying the patches that caused the problem, and resolve the
problem there.

It makes no sense to introduce breakage not fix it but blame libgcc
for it and wait for a completely unrelated, bigger change to happen.

Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
Few people do business well who do nothing else.
                                       -- Philip Earl of Chesterfield

[U-Boot] CONFIG_API, EABI and raise()

[Piotr Zięcik]

Wednesday 15 July 2009 18:09:30 Mike Frysinger napisa?(a):
> > CONFIG_API worked fine for ARM builds some time ago, and this breakage
> > seems like a recent development.
>
> or, it still works fine if your toolchain doesnt suck and isnt broken
> -mike

I have done some research and mike is right. We are using ELDK 4.2
which provides gnueabi compiler only. While compilng U-Boot,
-mabi=apcs-gnu switch forces APCS and as U-Boot uses this ABI.

However API demo application requires libgcc, which is avaible
in gnueabi version only and cannot be linked with objects, which use APCS.

Demo application is linked correctly on ELDK 4.1, which does not provide 
gnueabi tollchain.

-- 
Best Regards,
Piotr Zi?cik