Re: [toolchain-layer][pull-request] Remove old toolchain recipes

[Gary Thomas <gary@mlbassoc.com>]

On 2012-05-16 06:41, Thilo Fromm wrote:
> Hello Gary,
>
>>>>>> Khem Raj (3):
>>>>>>       eglibc-2.12: Remove
>>>>>>       binutils-2.20: Remove
>>>>>>       gcc-4.5: Remove
>>>>>
>>>>>
>>>>>
>>>>> Removing gcc-4.5 would kill Texas Instruments DaVinci (dm814x, dm816x)
>>>>> support. You only get a heavily patched 2.6.37 kernel from TI for
>>>>> these (linux-ti81xx-psp_2.6.37). Unfortunately gcc>= 4.6 is unable to
>>>>> build a kernel which boots for these platforms.
>>>>
>>>> I build with GCC 4.6.3 from that tree for the DM8148 all the time and
>>>> it works fine.  Maybe there is some option/selection in your
>>>> configuration
>>>> that's not in mine?  Can you send it&    I'll give it a compare?
>>>
>>> Sure! Our project is on github, and so is our defconfig:
>>>
>>> <https://github.com/DFE/HidaV/blob/master/meta-hidav/recipes-kernel-bootloader/linux/files/defconfig>
>>>
>>> We added aufs (Another Union File system) and the blockrom MTD FTL to
>>> the kernel, so there are additional options in our configuration.
>>>
>>
>> The only real differences (modulo the hardware/peripherals in use)
>> are some of the kernel debugging settings.  Perhaps they are causing
>> some problems with the newer compiler.  The diffs between our configurations
>> are attached.
>
> Thanks, but I don't think I will disable most of the debugging
> features for now. We have e.g. memory leak reports by the kernel
> memchecker in ext4. Given the pitiful state of linux-ti81xx-psp_2.6.37
> in general I'm not willing to give up the little debug info I get.

Fair enough, I was just pointing out a possible source of your pain :-)

BTW, do you know if TI ever plans on updating the kernel?  2.6.37 is so
painfully old...

>
>> As Martin points out, the newer compilers can have problems with unaligned
>> access.  I've also [sometimes] had better success if I disable
>> OPTIMIZE_FOR_SIZE
>>
>> The only other thing I see is the kernel version&  recipe used.  I am using
>> the stock one from meta-ti + some platform patches.  Perhaps there's
>> something
>> else to look at.
>>   meta-ti/recipes-kernel/linux/linux-ti81xx-psp_2.6.37.bb
>
> We're almost using this recipe too. We just appended AUFS integration
> and custom package management installer scripts for the kernel. I'll
> look into -mno-unaligned-access w/ gcc-4.7 as Gary suggested as soon
> as I am finished moving gcc-4.5 into HidaV so we can actually build
> firmware again :)

Good luck

-- 
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Gary Thomas                 |  Consulting for the
MLB Associates              |    Embedded world
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