[U-Boot] U-Boot, avr32: compiler warning with

[Heiko Schocher]

Hello Andreas,

Am 16.11.2015 um 09:48 schrieb Andreas Bießmann:
> Hi Heiko,
>
> On 11/16/2015 07:29 AM, Heiko Schocher wrote:
>> Hello Simon,
>>
>> I see an compile error for avr32 on travis.org for current mainline
>> U-Boot, see [1].
>>
>> git bisecting it, with the information that last working avr32 build
>> on travis.org is [2], shows:
>>
>> pollux:u-boot hs [(kein Branch, binäre Suche begonnen bei 20151116)] $
>> git bisect log
>> git bisect start
>> # good: [a5325cd5e91f77a2214e80198ae31c1d8b7e7c3c] configs: Remove
>> CONFIG_SERIAL_MULTI
>> git bisect good a5325cd5e91f77a2214e80198ae31c1d8b7e7c3c
>> # bad: [ae27120c31d58b8bb694d9155bcffdcfae8552a6] Merge
>> git://git.denx.de/u-boot-dm
>> git bisect bad ae27120c31d58b8bb694d9155bcffdcfae8552a6
>> # bad: [bae34335e8aef46d7103907580c40f18f1876bb0] exynos: Remove
>> unneeded device tree control #ifdefs
>> git bisect bad bae34335e8aef46d7103907580c40f18f1876bb0
>> # bad: [f615e6a64d23952d3c68b9ac92b4ef5fa5ebdf8a] dm: power: Add support
>> for S5M8767 regulators
>> git bisect bad f615e6a64d23952d3c68b9ac92b4ef5fa5ebdf8a
>> # bad: [f1ac35b7a6c6bc878d473b5955370b1cc49dba54] exynos: dts: Sync up
>> I2C ports with the kernel
>> git bisect bad f1ac35b7a6c6bc878d473b5955370b1cc49dba54
>> # good: [7fc65bcf8a0a5463db86efbb273a40448c845efc] dm: i2c: Move
>> definitions to the top of the header file
>> git bisect good 7fc65bcf8a0a5463db86efbb273a40448c845efc
>> # bad: [b725dc458f9db44957d4f541d05defe178dda7b5] i2c: Add a mux for
>> GPIO-based I2C bus arbitration
>> git bisect bad b725dc458f9db44957d4f541d05defe178dda7b5
>> # bad: [3d1957f0ea0133ec06f9c6fd85dc1acdf66ad29c] dm: i2c: Add support
>> for multiplexed I2C buses
>> git bisect bad 3d1957f0ea0133ec06f9c6fd85dc1acdf66ad29c
>> # good: [df358c6beca8f7cc2f2b67c54f0bf255ebd5cc22] dm: i2c: Add a
>> function to transfer messages
>> git bisect good df358c6beca8f7cc2f2b67c54f0bf255ebd5cc22
>> # first bad commit: [3d1957f0ea0133ec06f9c6fd85dc1acdf66ad29c] dm: i2c:
>> Add support for multiplexed I2C buses
>> pollux:u-boot hs [(kein Branch, binäre Suche begonnen bei 20151116)] $
>>
>> Hmm... it seems, that introducing the subdir "muxes" leads into
>> this error for avr32 ... I just tried the following patch:
>
> I know about this but had no time to investigate it deeper. It seems
> this is a toolchain problem ... and there is no way to get another
> toolchain.
>
>> diff --git a/drivers/i2c/Makefile b/drivers/i2c/Makefile
>> index 32198bd..811ad9b 100644
>> --- a/drivers/i2c/Makefile
>> +++ b/drivers/i2c/Makefile
>> @@ -40,4 +40,4 @@ obj-$(CONFIG_SYS_I2C_UNIPHIER) += i2c-uniphier.o
>>   obj-$(CONFIG_SYS_I2C_UNIPHIER_F) += i2c-uniphier-f.o
>>   obj-$(CONFIG_SYS_I2C_ZYNQ) += zynq_i2c.o
>>
>> -obj-y += muxes/
>> +obj-$(CONFIG_I2C_MUX) += muxes/
>> pollux:u-boot hs [20151116] $
>>
>> and the error "drivers/i2c/built-in.o: warning: input is not relaxable"
>> is gone ...
>>
>> Do you have an idea, why this breaks? Is above patch a valid fix?
>> (I checked, that all boards using CONFIG_I2C_ARB_GPIO_CHALLENGE have
>>   also set CONFIG_I2C_MUX)
>
> For me this is a valid fix. Would you send a proper patch?

Yes, of course, but I want to wait for Simons comment, thanks!

bye,
Heiko
>
> Andreas
>
>>
>> bye,
>> Heiko
>> [1] current U-Boot compile error for avr32 on travis.org:
>> https://travis-ci.org/u-boot/u-boot/jobs/90954387
>>
>> [2] last working U-Boot compile on travis.org for avr32:
>> https://travis-ci.org/u-boot/u-boot/builds/74310800
>

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