Re: [PATCH] [media] v4l2-pci-skeleton: Only build if PCI is available

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On 08/26/14 12:59, Randy Dunlap wrote:
> On 08/26/14 12:26, Mark Brown wrote:
>> On Tue, Aug 26, 2014 at 12:20:54PM -0700, Randy Dunlap wrote:
>>> On 08/26/14 10:25, Mark Brown wrote:
>>
>>>> index d58101e788fc..65a351d75c95 100644
>>>> --- a/Documentation/video4linux/Makefile
>>>> +++ b/Documentation/video4linux/Makefile
>>>> @@ -1 +1 @@
>>>> -obj-m := v4l2-pci-skeleton.o
>>>> +obj-$(CONFIG_VIDEO_PCI_SKELETON) := v4l2-pci-skeleton.o
>>>> diff --git a/drivers/media/v4l2-core/Kconfig b/drivers/media/v4l2-core/Kconfig
>>
>>>> +config VIDEO_PCI_SKELETON
>>>> +	tristate "Skeleton PCI V4L2 driver"
>>>> +	depends on PCI && COMPILE_TEST
>>
>>> 	               && ??  No, don't require COMPILE_TEST.
>>
>> That's a very deliberate choice.  There's no reason I can see to build
>> this code other than to check that it builds, it's reference code rather
>> than something that someone is expected to actually use in their system.  
>> This seems like a perfect candidate for COMPILE_TEST.
>>
>>> 		However, PCI || COMPILE_TEST would allow it to build on arm64
>>> 		if COMPILE_TEST is enabled, guaranteeing build errors.
>>> 		Is that what should happen?  I suppose so...
>>
>> No, it's not - if it's going to depend on COMPILE_TEST at all it need to
>> be a hard dependency.
> 
> How about just drop COMPILE_TEST?  This code only builds if someone enabled
> BUILD_DOCSRC.  That should be enough (along with PCI and some VIDEO kconfig
> symbols) to qualify it.

I'll add BUILD_DOCSRC to the depends list in the Kconfig file...


-- 
~Randy
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