OPTEE Examples

YY34173 — Sun, 12 Oct 2025 01:45:38 GMT

I'm building an Yocto image using on a Var-som-mx8m-nano with Scarthgap. (https://dev.variscite.com/var-som-mx8m-nano/mx8mn-yocto-scarthgap-6.6.52_2.2.0-v1.1/yocto-build-release/)

I've followed this guide: https://community.nxp.com/t5/i-MX-Processors/Building-optee-examples-and-trusted-Apps-in-Yocto-bitbake/m-p/1383425/highlight/true

Although this answer is old, I've added the Optee-examples version 4.7, and populated the .bb file with the information found in that link. The local.conf file I edited according to the official docs since the advice on the answer is depreciated.

However, the rest of the optee files are version 4.4. If I try to bitbake optee-examples without adding the .bb file, I get an error saying there's no target.

I ran bitbake -DDD optee-examples

I get the following error:

DEBUG: Attempting to disable network for do_install
DEBUG: SOURCE_DATE_EPOCH: 1627299039
DEBUG: Executing task do_install
DEBUG: optee-examples-4.7.0-r0 do_install: Executing python function extend_recipe_sysroot
DEBUG: optee-examples-4.7.0-r0 do_install: Python function extend_recipe_sysroot finished
DEBUG: optee-examples-4.7.0-r0 do_install: Executing shell function do_install
ERROR: optee-examples-4.7.0-r0 do_install: ExecutionError('/home/optee/var-fsl-yocto/build_xwayland/tmp/work/imx8mn_var_som-poky-linux/optee-examples/4.7.0/temp/run.do_install.53250', 1, None, None)
ERROR: Logfile of failure stored in: /home/optee/var-fsl-yocto/build_xwayland/tmp/work/imx8mn_var_som-poky-linux/optee-examples/4.7.0/temp/log.do_install.53250
Log data follows:
| DEBUG: Executing python function extend_recipe_sysroot
| NOTE: Direct dependencies are ['/home/optee/var-fsl-yocto/sources/meta-imx/meta-imx-bsp/recipes-security/optee/optee-client_4.4.0.imx.bb:do_populate_sysroot', '/home/optee/var-fsl-yocto/sources/meta-imx/meta-imx-bsp/recipes-security/optee/optee-os_4.4.0.imx.bb:do_populate_sysroot', '/home/optee/var-fsl-yocto/sources/poky/meta/recipes-core/glibc/glibc_2.39.bb:do_populate_sysroot', '/home/optee/var-fsl-yocto/sources/poky/meta/recipes-devtools/gcc/gcc-cross_13.3.bb:do_populate_sysroot', '/home/optee/var-fsl-yocto/sources/poky/meta/recipes-devtools/gcc/gcc-runtime_13.3.bb:do_populate_sysroot', '/home/optee/var-fsl-yocto/sources/poky/meta/recipes-devtools/quilt/quilt-native_0.67.bb:do_populate_sysroot', 'virtual:native:/home/optee/var-fsl-yocto/sources/poky/meta/recipes-devtools/patch/patch_2.7.6.bb:do_populate_sysroot', 'virtual:native:/home/optee/var-fsl-yocto/sources/poky/meta/recipes-devtools/pseudo/pseudo_git.bb:do_populate_sysroot', 'virtual:native:/home/optee/var-fsl-yocto/sources/poky/meta/recipes-devtools/python/python3-pycryptodome_3.20.0.bb:do_populate_sysroot', 'virtual:native:/home/optee/var-fsl-yocto/sources/poky/meta/recipes-devtools/python/python3_3.12.6.bb:do_populate_sysroot']
| NOTE: Installed into sysroot: []
| NOTE: Skipping as already exists in sysroot: ['optee-client', 'optee-os', 'base-files', 'base-passwd', 'gettext-minimal-native', 'glibc', 'libxcrypt', 'util-linux-libuuid', 'zlib', 'binutils-cross-aarch64', 'cmake-native', 'gcc-cross-aarch64', 'gcc-runtime', 'libgcc', 'libtool-native', 'm4-native', 'opkg-utils', 'quilt-native', 'cracklib', 'libpam', 'shadow-sysroot', 'shadow', 'texinfo-dummy-native', 'linux-libc-headers', 'attr', 'openssl-native', 'expat-native', 'ncurses-native', 'util-linux-libuuid-native', 'zlib-native', 'flex-native', 'gnu-config-native', 'libedit-native', 'make-native', 'patch-native', 'perl-native', 'pseudo-native', 'python3-build-native', 'python3-cffi-native', 'python3-flit-core-native', 'python3-installer-native', 'python3-packaging-native', 'python3-pycparser-native', 'python3-pycryptodome-native', 'python3-pyproject-hooks-native', 'python3-setuptools-native', 'python3-wheel-native', 'python3-native', 'bzip2-native', 'libnsl2-native', 'libtirpc-native', 'shadow-native', 'unzip-native', 'xz-native', 'zstd-native', 'attr-native', 'gdbm-native', 'gmp-native', 'libbsd-native', 'libffi-native', 'libmd-native', 'libmpc-native', 'mpfr-native', 'sqlite3-native']
| DEBUG: Python function extend_recipe_sysroot finished
| DEBUG: Executing shell function do_install
| install: cannot stat '/home/optee/var-fsl-yocto/build_xwayland/tmp/work/imx8mn_var_som-poky-linux/optee-examples/4.7.0/build/ta/*': No such file or directory
| WARNING: exit code 1 from a shell command.
ERROR: Task (/home/optee/var-fsl-yocto/sources/meta-imx/meta-imx-bsp/recipes-security/optee/optee-examples_4.7.0.bb:do_install) failed with exit code '1'
DEBUG: Teardown for bitbake-worker
DEBUG: Teardown for bitbake-worker
NOTE: Tasks Summary: Attempted 1508 tasks of which 1507 didn't need to be rerun and 1 failed.
NOTE: Writing buildhistory
DEBUG: Executing python function buildhistory_write_sigs
DEBUG: Python function buildhistory_write_sigs finished
DEBUG: Executing shell function buildhistory_commit
DEBUG: Shell function buildhistory_commit finished
NOTE: Writing buildhistory took: 5 seconds

Summary: 1 task failed:
/home/optee/var-fsl-yocto/sources/meta-imx/meta-imx-bsp/recipes-security/optee/optee-examples_4.7.0.bb:do_install
Summary: There were 2 WARNING messages.
Summary: There was 1 ERROR message, returning a non-zero exit code.

I am stuck:

there is no * file in the location /home/optee/var-fsl-yocto/build_xwayland/tmp/work/imx8mn_var_som-poky-linux/optee-examples/4.7.0/build/ta/*'
I don't know what type of file it's looking for to create one
It doesn't solve the do_install error either

Any help is appreciated.

Re: OPTEE Examples

Harvey021 — Tue, 14 Oct 2025 08:57:15 GMT

Please try to keep the versions consistent. The default BSP includes an optee file and example recipes for reference.

Regards

Harvey

Re: OPTEE Examples

YY34173 — Tue, 14 Oct 2025 15:36:59 GMT

Thanks! If the default bsp includes optee examples, how would I access those without bitbake optee-examples? My goal is to use the examples to help build a TA for a use case I have.

Re: OPTEE Examples

YY34173 — Tue, 14 Oct 2025 16:20:41 GMT

To add on, since I can't edit my original reply. All the other optee files I was able to build successfully.So if there's a way to access the optee examples if they are included, that would be optimal.

There's something within Scarthgap that really doesn't like optee-examples. I was able to find the 4.4 version of optee-examples and I still got an error:

| install: cannot stat '/home/optee/var-fsl-yocto/build_xwayland/tmp/work/imx8mn_var_som-poky-linux/optee-examples/4.4.0/build/ta/*': No such file or directory
| WARNING: exit code 1 from a shell command.
ERROR: Task (/home/optee/var-fsl-yocto/sources/meta-imx/meta-imx-bsp/recipes-security/optee/optee-examples_4.4.0.bb:do_install) failed with exit code '1'

Re: OPTEE Examples

Harvey021 — Mon, 20 Oct 2025 10:42:02 GMT

We don't provide optee examples. I tried to base on the BSP-6.6.52 and reference to the examples to modify, the build successes on my side.

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