[OE-core] [PATCH 1/1] base.bbclass: fix COMPATIBLE_MACHINE

[Robert Yang]

On 04/11/2016 04:29 PM, Richard Purdie wrote:
> On Mon, 2016-04-11 at 10:11 +0800, Robert Yang wrote:
>>
>> On 04/11/2016 09:56 AM, Christopher Larson wrote:
>>> On Sun, Apr 10, 2016 at 6:17 PM Robert Yang <
>>> liezhi.yang at windriver.com
>>> <mailto:liezhi.yang at windriver.com>> wrote:
>>>
>>>
>>>
>>>      On 04/11/2016 03:06 AM, Denys Dmytriyenko wrote:
>>>       > On Sun, Apr 10, 2016 at 07:14:56AM -0700, Robert Yang wrote:
>>>       >> It mismatched such as qemux86 and qemux86-64 which was
>>> incorrect, for
>>>       >> example:
>>>       >> COMPATIBLE_MACHINE = "(qemux86)"
>>>       >
>>>       > That will match qemux86 and qemux86-64 and is by design!
>>> It's a regular
>>>
>>>      I'm afraid no, please see my last reply, for others such as
>>>      MACHINE_OVERRIDES, they never design to work in such a way, so
>>> I don't
>>>      think that COMPATIBLE_MACHINE should work in this way. If you
>>> really
>>>      want to match more, I think that you can set it as
>>> "(qemux86.*)" or
>>>      something familiar.
>>>
>>>
>>> That's an apples and oranges comparison. MACHINEOVERRIDES is part
>>> of OVERRIDES,
>>> which has *completely* different semantics than COMPATIBLE_*.
>>> COMPATIBLE_MACHINE
>>> is a regex variable more like BBMASK than anything else, and it's
>>> been that way
>>> since we introduced it. OVERRIDES has nothing to do with regular
>>> expressions.
>>
>> Since introduced ? I did a grep in oe-core and meta-openembedded, it
>> seems
>> that no ?
>>
>> In oe-core:
>>
>> $ grep 'COMPATIBLE_MACHINE.*qemux86' meta/recipes* -r
>> linux-yocto_4.4.bb:COMPATIBLE_MACHINE =
>> "qemuarm|qemuarm64|qemux86|qemuppc|qemumips|qemumips64|qemux86-64"
>> linux-yocto-tiny_4.4.bb:COMPATIBLE_MACHINE = "(qemux86)"
>> linux-yocto-dev.bb:COMPATIBLE_MACHINE =
>> "(qemuarm|qemux86|qemuppc|qemumips|qemumips64|qemux86-64)"
>> linux-yocto-tiny_4.1.bb:COMPATIBLE_MACHINE = "(qemux86)"
>> linux-yocto-rt_4.1.bb:COMPATIBLE_MACHINE =
>> "(qemux86|qemux86-64|qemuarm|qemuppc|qemumips)"
>> linux-yocto-rt_4.4.bb:COMPATIBLE_MACHINE =
>> "(qemux86|qemux86-64|qemuarm|qemuppc|qemumips)"
>> linux-yocto_4.1.bb:COMPATIBLE_MACHINE =
>> "qemuarm|qemuarm64|qemux86|qemuppc|qemumips|qemumips64|qemux86-64"
>>
>> In meta-openembedded:
>> vboxguestdrivers_4.3.30.bb:COMPATIBLE_MACHINE = "(qemux86|qemux86
>> -64)"
>>
>> We can see that the only one sets qemux86 but no set qemux86-64 is
>> linux-yocto-tiny:
>> COMPATIBLE_MACHINE = "(qemux86)"
>>
>> And it really doesn't work with qemux86-64.
>
> The trouble is as others have mentioned, COMPATIBLE_MACHINE has always
> worked this way. We can't really change that without a wider discussion
> and at this point in the release in particular, I can't take such a
> patch.
>
> We do really need to think about the behaviour as it does do unexpected
> things and catch people out.
>
> I'd suggest you add a '$' to the end of the regex in linux-yocto-tiny

Thanks, I will send a new patch it.

> to resolve this. We could also add '$' to the end of the other usages
> and make it clear it is a regex?

I'd like to only fix linux-yocto-tiny atm in case of cause other errors,
maybe we can do that for other recipes in YP 2.2.

// Robert

>
> Cheers,
>
> Richard
>
>
>