[yocto] Creating image with genericx86 machine and RT-Preempt Patch

[Bruce Ashfield]

On 2015-07-07 12:30 PM, Bruce Ashfield wrote:
> On 2015-07-07 7:56 AM, Gorny Krystian wrote:
>> Hi,
>>
>> I try to build an image for a x86 architecture with RT-Preemtp Patch. So
>> I use the genericx86 machine and try to build the core-image-rt recipe.
>> This fails with the following errors:
>>
>> /> ERROR: Nothing PROVIDES 'linux-yocto-rt' (but
>> /media/disk/myYocto/poky/meta/recipes-rt/images/core-image-rt.bb DEPENDS
>> on or otherwise requires it)/
>>
>> /> ERROR: linux-yocto-rt was skipped: incompatible with machine
>> genericx86 (not in COMPATIBLE_MACHINE)/
>>
>> /> ERROR: Required build target 'core-image-rt' has no buildable
>> providers./
>>
>> /> Missing or unbuildable dependency chain was: ['core-image-rt',
>> 'linux-yocto-rt']/
>>
>> So I add the following parameter to my local.conf file:
>>
>> /> COMPATIBLE_MACHINE_genericx86 = "genericx86"/
>>
>> /> COMPATIBLE_MACHINE_quilt-native = "genericx86"/
>>
>> /> PREFERRED_PROVIDER_virtual/kernel = "linux-yocto-rt"/
>>
>> But I get this error:
>>
>> /> ERROR: Task 80
>> (/media/disk/myYocto/poky/meta/recipes-kernel/linux/linux-yocto-rt_3.14.bb,
>>
>> do_compile) failed with exit code '1'/
>>
>> In the log.do_compile file I see:
>>
>> /> NOTE: make -j 4 bzImage CC=i686-poky-linux-gcc
>> LD=i686-poky-linux-ld.bfd/
>>
>> /> make[3]: Nothing to be done for `all'./
>>
>> />   CHK     include/config/kernel.release/
>>
>> />   GEN
>> /media/disk/myYocto/poky/build/tmp/work/genericx86-poky-linux/linux-yocto-rt/3.14.36+gitAUTOINC+a996d95104_3428de7103-r0/linux-genericx86preempt-$/
>>
>>
>> />   CHK     include/generated/uapi/linux/version.h/
>>
>> />   CHK     include/generated/utsrelease.h/
>>
>> />   HOSTCC  scripts/conmakehash/
>>
>> />   HOSTCC  scripts/sortextable/
>>
>> />   CC      scripts/mod/empty.o/
>>
>> />
>> /media/disk/myYocto/poky/build/tmp/work-shared/genericx86/kernel-source/scripts/mod/empty.c:1:0:
>>
>> error: code model 'kernel' not supported in the 32 bit >mode/
>>
>> />  /* empty file to figure out endianness / word size *//
>>
>> />  ^/
>>
>> />
>> /media/disk/myYocto/poky/build/tmp/work-shared/genericx86/kernel-source/scripts/mod/empty.c:1:0:
>>
>> sorry, unimplemented: 64-bit mode not compiled in/
>>
>> /> make[4]: *** [scripts/mod/empty.o] Error 1/
>>
>> /> make[4]: *** Waiting for unfinished jobs..../
>>
>> />   HOSTCC  scripts/mod/mk_elfconfig/
>>
>> /> make[3]: *** [scripts/mod] Error 2/
>>
>> /> make[3]: *** Waiting for unfinished jobs..../
>>
>> /> make[2]: *** [scripts] Error 2/
>>
>> /> make[1]: *** [sub-make] Error 2/
>>
>> /> make: *** [all] Error 2/
>>
>> /> ERROR: oe_runmake failed/
>>
>> /> WARNING: exit code 1 from a shell command./
>>
>> I already tried genericx86_64 machine and it’s still not working. Are
>> the genericx86 machine incompatible with the core-image-rt recipy? If
>> yes how can I build a x86 image with the RT patch?
>
> What you did should have worked, since we do map the genericx86 BSP onto
> one of the configurations that supports preempt-rt.
>
> It looks like a compile error has crept in .. I'll start a build and see
> if it is indeed broken at the moment (and then I can fix it).
>

Assuming you are building with yocto/poky, you need the following patch.
(note: this is configure tested only).

Since without this bbappend, we don't have genericx86 mapped to a valid
linux-yocto BSP and commit hash.

I'll be sending this change for merging into the project shortly.

Cheers,

Bruce

> Bruce
>
>>
>> Many Thanks
>>
>>
>> _____________________________________________________________________
>>
>> *Krystian Gorny*
>> Research & Development
>>
>> Wipotec GmbH
>> Adam-Hoffmann-Str. 26
>> 67657 Kaiserslautern
>>
>> T +49.631.34146-0
>> F +49.631.34146-8640
>> http://www.wipotec.com
>>
>>
>>
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>>
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>

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