[Buildroot] gcc-4.7.3 potential issue with barebox

[Buildroot] gcc-4.7.3 potential issue with barebox

[Grégory Hermant]

Hi all,
I noticed an issue with barebox binary about the nandflash detection.
Indeed barebox is unable to detect the nandflash when i build barebox from gcc-4.7.3 (buildroot-2013.05)
By digging a little bit  i noticed  that  the size of atmel_nand.o was different according to the toolchain release (atmel_nand.o 4732bytes vs 5096 bytes for gcc-4.6.3 )
If i disassemble atmel_nand.o i notice that  atmel_nand_enable & atmel_nand_disable are missing.
Is it an known issue ?
Gr?gory

[Buildroot] gcc-4.7.3 potential issue with barebox

[Thomas Petazzoni]

Dear Gr?gory Hermant,

On Mon, 17 Jun 2013 14:57:21 +0200, Gr?gory Hermant wrote:

> I noticed an issue with barebox binary about the nandflash detection.
> Indeed barebox is unable to detect the nandflash when i build barebox from gcc-4.7.3 (buildroot-2013.05)
> By digging a little bit  i noticed  that  the size of atmel_nand.o was different according to the toolchain release (atmel_nand.o 4732bytes vs 5096 bytes for gcc-4.6.3 )
> If i disassemble atmel_nand.o i notice that  atmel_nand_enable & atmel_nand_disable are missing.
> Is it an known issue ?

I don't remember hearing about this, but maybe you could check with
another ARM gcc 4.7 based toolchain such as the Linaro toolchain, and
see if the generated code is correct or not. If the generated code is
also not correct, then maybe it's a Barebox issue, otherwise it would
most likely be a Buildroot toolchain issue.

Best regards,

Thomas
-- 
Thomas Petazzoni, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com

[Buildroot] gcc-4.7.3 potential issue with barebox

[Grégory Hermant]

Hi thomas,
Same issue with gcc version 4.7.3 (Sourcery CodeBench Lite 2013.05-24) toolchain.
BR,
gr?gory

Le 17/06/2013 16:25, Thomas Petazzoni a ?crit :
> Dear Gr?gory Hermant,
>
> On Mon, 17 Jun 2013 14:57:21 +0200, Gr?gory Hermant wrote:
>
>> I noticed an issue with barebox binary about the nandflash detection.
>> Indeed barebox is unable to detect the nandflash when i build barebox from gcc-4.7.3 (buildroot-2013.05)
>> By digging a little bit  i noticed  that  the size of atmel_nand.o was different according to the toolchain release (atmel_nand.o 4732bytes vs 5096 bytes for gcc-4.6.3 )
>> If i disassemble atmel_nand.o i notice that  atmel_nand_enable & atmel_nand_disable are missing.
>> Is it an known issue ?
> I don't remember hearing about this, but maybe you could check with
> another ARM gcc 4.7 based toolchain such as the Linaro toolchain, and
> see if the generated code is correct or not. If the generated code is
> also not correct, then maybe it's a Barebox issue, otherwise it would
> most likely be a Buildroot toolchain issue.
>
> Best regards,
>
> Thomas

[Buildroot] gcc-4.7.3 potential issue with barebox

[Thomas Petazzoni]

Dear Gr?gory Hermant,

On Tue, 18 Jun 2013 17:02:59 +0200, Gr?gory Hermant wrote:

> Same issue with gcc version 4.7.3 (Sourcery CodeBench Lite 2013.05-24) toolchain.

Then maybe it's a Barebox vs. gcc 4.7.x issue that should be reported
to the Barebox people? I'm pretty sure they have already built and
tested Barebox with gcc 4.7, but maybe there are some remaining
problems in specific areas?

Best regards,

Thomas
-- 
Thomas Petazzoni, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com