[OE-core] [PATCHv2 01/13] systemtap: remove usage of FILESPATH

[Khem Raj]

On May 10, 2014, at 3:31 PM, petter at technux.se wrote:

> 2014-05-10 18:58 skrev Khem Raj:
> 
>> On Sat, May 10, 2014 at 1:05 AM, Petter Mabäcker <petter at technux.se>
>> wrote:
>> 
>>> +FILESEXTRAPATHS_prepend := "${THISDIR}/systemtap:"
>> 
>> would something like
>> 
>> FILESEXTRAPATHS =. "${FILE_DIRNAME}/systemtap:"
>> 
>> avoid the prepend and immediate evaluation
> 
> I guess someone with deep bitbake knowledge can answer this better. But as far as I understand, you should always use immediate evaluation when using THISDIR, to be extra safe. Not sure if it's more safe to use FILE_DIRNAME if you want to avoid immediate expanding when using FILESEXTRAPATHS?
> 
> The bitbake documentations says:
> 
> "The operators "_append" and "_prepend" differ from the operators ".=" and "=." in that they are deferred until after parsing completes rather than being immediately applied."
> 
> Not sure if above means that "=." will also immediately expand variables or not?
> 
> Personally I have always used FILESEXTRAPATHS_prepend := "${THISDIR}/<somename>:" like the yocto documentation recommends. But sure if you can avoid immediate expanding in FILESEXTRPATHS, that would mean a tiny optimization. In that case perhaps the documentation should be updated as well. Looking in meta-layer both methods seems to be used.


I was hinting on avoiding THISDIR but that does not solve the problem probably what you have it ok in this case.

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