Re: [BUILD FAILURE 11/12] Next April 21 : PPC64 randconfig [drivers/usb/host/ohci-hcd.o]

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Kumar Gala wrote:
> 
> On Apr 21, 2009, at 2:03 PM, David Brownell wrote:
> 
>> On Tuesday 21 April 2009, Subrata Modak wrote:
>>> Observing this for the first time:
>>>
>>> CC      drivers/usb/host/ohci-hcd.o
>>> In file included from drivers/usb/host/ohci-hcd.c:1060:
>>> drivers/usb/host/ohci-ppc-of.c:242:2: error: #error "No endianess
>>
>> Hmm, scripts/get_maintainer.pl doesn't report
>> the PPC folk who maintain that file and its
>> kbuild infrastructure.
>>
>> Can we have some PPC folk look at (and fix) this?
> 
> The problem is in the drivers/usb/host/Kconfig:
> 
> config USB_OHCI_HCD_PPC_OF_BE
>         bool "Support big endian HC"
>         depends on USB_OHCI_HCD_PPC_OF
>         default y
>         select USB_OHCI_BIG_ENDIAN_DESC
>         select USB_OHCI_BIG_ENDIAN_MMIO
> 
> config USB_OHCI_HCD_PPC_OF_LE
>         bool "Support little endian HC"
>         depends on USB_OHCI_HCD_PPC_OF
>         default n
>         select USB_OHCI_LITTLE_ENDIAN
> 
> Since its feasible to say 'n' to both we get the compile error.  How do
> we enforce having at least one set?

Looks like using "choice" without "optional" would do it.
See Documentation/kbuild/kconfig-language.txt and various examples
in Kconfig* files.

-- 
~Randy
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