I tried to build spidev-test using the bitbake recipe:

spidev-test.bb

I set: 
ARCH=arm 
BBPATH 
CROSS_COMPILER=arm-linux-gnueabihf- 
PATH 

... and then tried to build spidev-test:

$ bitbake -b spidev-test.bb 
WARNING: Buildfile specified, dependencies will not be handled. If this
is not what you want, do not use -b / --buildfile.
Loading cache: 100%
|################################################################| Time:
0:00:00
Loaded 1433 entries from dependency cache.

Build Configuration:
BB_VERSION           = "1.49.2"
BUILD_SYS            = "x86_64-linux"
NATIVELSBSTRING      = "fedora-33"
TARGET_SYS           = "x86_64-oe-linux"
MACHINE              = "qemux86-64"
DISTRO               = "nodistro"
DISTRO_VERSION       = "nodistro.0"
TUNE_FEATURES        = "m64 core2"
TARGET_FPU           = ""
meta                 = "master:fa1e1fbc082e82e41ccfeae58af97fe048c9aac7"

Initialising tasks: 100%
|###########################################################| Time:
0:00:00
Sstate summary: Wanted 6 Local 0 Network 0 Missed 6 Current 0 (0% match,
0% complete)
NOTE: Executing Tasks
WARNING: spidev-test-1.0-r0 do_populate_lic: Could not copy license file
/home/fedora/openembedded-core/meta/files/common-licenses/GPL-2.0 to
/home/fedora/openembedded-core/build/tmp-glibc/work/qemux86_64-oe-linux/spidev-test/1.0-r0/license-destdir/spidev-test/GPL-2.0:
[Errno 2] No such file or directory:
'/home/fedora/openembedded-core/meta/files/common-licenses/GPL-2.0'
ERROR: spidev-test-1.0-r0 do_populate_lic: QA Issue: spidev-test:
LIC_FILES_CHKSUM points to an invalid file:
/home/fedora/openembedded-core/meta/files/common-licenses/GPL-2.0
[license-checksum]
ERROR: spidev-test-1.0-r0 do_populate_lic: Fatal QA errors found,
failing task.
ERROR: Logfile of failure stored in:
/home/fedora/openembedded-core/build/tmp-glibc/work/qemux86_64-oe-linux/spidev-test/1.0-r0/temp/log.do_populate_lic.281153
ERROR: Task
(/home/fedora/junk/meta-openembedded/meta-oe/recipes-kernel/spidev-test/spidev-test.bb:do_populate_lic)
failed with exit code '1'
NOTE: Tasks Summary: Attempted 3 tasks of which 0 didn't need to be
rerun and 1 failed.

Summary: 1 task failed:
 
/home/fedora/junk/meta-openembedded/meta-oe/recipes-kernel/spidev-test/spidev-test.bb:do_populate_lic
Summary: There were 2 WARNING messages shown.
Summary: There were 2 ERROR messages shown, returning a non-zero exit
code.

 What's this about licences? 

---John

On 2021-03-16 11:50, jchludzinski via lists.yoctoproject.org wrote: 

> I'm 'bitbaking' now.
> 
> On 2021-03-16 10:53, jchludzinski via lists.yoctoproject.org wrote: Well, because time is of the essence, could you give me a little
> assist here and explain how I might build spidev-test using
> OpenEmbedded?
> 
> THANKS for your help!
> ---John
> 
> On 2021-03-16 05:58, Josef Holzmayr wrote: Am Di., 16. März 2021 um 10:49 Uhr schrieb Nicolas Dechesne
> <nicolas.dechesne@linaro.org>: 
> On Tue, Mar 16, 2021 at 8:07 AM jchludzinski via
> lists.yoctoproject.org
> <jchludzinski=vivaldi.net@lists.yoctoproject.org> wrote: 
> It certainly appears to be BUT I'm not certain what I'm looking at?
> 
> What is meta-openembedded?
> 
> Is it a GIT repo that can be cloned and built? 
> Short answer is yes. The whole Yocto Project / Open Embedded concept
> is based around 'layers. A layer is a repository that contains recipes
> (and/or machine/distro, ..). The Yocto Project releases include a
> couple of common/core layers, but there are plenty of layers out there
> which can be used
> I am sure there are quite a bit of documentation on this topic, but
> perhaps you might want to start with:
> https://docs.yoctoproject.org/overview-manual/yp-intro.html#the-yocto-project-layer-model

Or grab a beer and start bingewatching
https://www.youtube.com/playlist?list=PLD4M5FoHz-TxMfBFrDKfIS_GLY25Qsfyj

</SCNR>

> How do I use this to build spidev-test?
> 
> ---John
> 
> On 2021-03-15 19:54, akuster wrote:
> 
> On 3/15/21 4:11 PM, jchludzinski via lists.yoctoproject.org wrote:
> 
> I got a piece of code from github:
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/tools/spi/spidev_test.c
> 
> I'd like to add it somewhere under /*tools/testing*/ and build it there.
> 
> Not sure if this is appropriate? If so, how do I go about this?
> 
> If not, what's the best way to build this?
> 
> Is this what you are looking for?
> https://git.openembedded.org/meta-openembedded/tree/meta-oe/recipes-kernel/spidev-test/spidev-test.bb
> 
> -armin