[meta-freescale] [meta-fsl-arm] libmcc sysroot issues

[Petr Kubizňák]

Hello Otavio,

Thank you for your patches. I rebuilt yocto and my application 
afterwards, and would like to confirm successful build.

Best Regards,
Petr

Petr Kubiznak
Embedded SW Developer
ELNICO s.r.o.
Heydukova 2923, 544 01 Dvur Kralove n.L., Czech Republic
T: +420 499 321 019 | M: +420 724 053 668
www.elnico.cz <http://www.elnico.cz/> | www.sqm4.com 
<http://www.sqm4.com> | kubiznak.petr at elnico.cz 
<mailto:kubiznak.petr at elnico.cz>


On 01/06/2015 05:32 PM, Otavio Salvador wrote:
> Hello,
>
> (added people which may be interested on Cc)
>
> I have prepared a set of patches which I think improves this.
>
> On Mon, Jan 5, 2015 at 5:12 PM, Petr Kubizňák <kubiznak.petr at elnico.cz> wrote:
>> I'm experiencing sysroot issues with the libmcc library on the latest
>> revision of branch dizzy (2014-12-30, commit
>> 7539a694f3d01f1ab5162bfee16b0327f827c4f7). Not all required files are
>> populated into the SDK, so the library cannot be further used in the
>> application development without manually manipulating the sysroot.
>>
>> First of all, compilation of such application fails on the dependency on
>> <linux/mvf_sema4.h> include file, coming from <linux/mcc_config.h>. The
>> mvf_sema4.h file is a part of linux-timesys (3.0.15) kernel (directory
>> include/linux), and should be located in /usr/include/linux in the SDK
>> sysroot. I wanted to create a patch, but did not find an automated solution
>> (as I already described at https://community.freescale.com/message/466383).
>> This issue is not just my case, as you can find for example at the following
>> link:
>> http://developer.toradex.com/how-to/colibri-vf61-real-time-demo-%28xy-pen-plotter%29#Building_the_Qt_User_Interface
> Fixed. See below.
>
>> Second (after fixing the first issue manually), linking of such application
>> fails on "-lmcc" flag, as it cannot locate libmcc.so library. In sysroot's
>> /usr/lib, there is only libmcc.so.1.0, but a libmcc.so link is missing.
>> After creating the link manually, the application can build and run as
>> expected.
> Fixed. See below.
>
>> I would like to ask for a patch of these two issues, or at least for
>> pointing me to some *brief* resource where I might learn how to create the
>> patch on myself (i.e. what meta-data say yocto how to generate sysroots).
>> Sorry, but studying the whole yocto documentation is just too long run. I
>> spent whole day trying to find a solution with no success.
> I prepared patches for kernel-module-mcc to build fine on master and
> also the libmcc symlink issue.
>
> The headers I fixed adding the module headers in the libmcc-dev
> rdepends so it is included along the library.
>
> For testing purposes, please check the dizzy-next or master-next
> branch and add to your local.conf:
>
> ----
> TOOLCHAIN_TARGET_TASK_append = ' \
>      libmcc-dev \
> '
> ----
>
> After that, do:
>
> bitbake core-image-base -c populate_sdk
>
> and this should work fine.
>
> Specially the mcc_config.h change would be good to have Timesys
> engineers to comment and ack it. As it may have impact to other users.
>

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