I'm following this guide https://wiki.st.com/stm32mpu/wiki/STM32MPU_Developer_Package and I'm stuck at 5.2.3. Building and deploying the Linux kernel for the first time. I followed all ST recommendations for directories names and structures, so everything is exactly how they say.
Following this README: https://github.com/STMicroelectronics/meta-st-stm32mp/blob/scarthgap/recipes-kernel/linux/linux-stm32mp/README.HOW_TO.txt, I'm stuck at 6.2 Compile External Device tree. When executing this make command with stm32mp257f-ev1-ca35tdcid-ostl.dtb as name of external devicetree:
make ${IMAGE_KERNEL} O="${OUTPUT_BUILD_DIR}" KBUILD_EXTDTS="${EXTDT_DIR}/linux" <name of external devicetree .dtb>
I get these errors:
make[1]: Entering directory '/home/vboxuser/STM32MPU-Dev/Developer-Package/stm32mp2-openstlinux-6.6-yocto-scarthgap-mpu-v24.11.06/sources/aarch64-ostl-linux/linux-stm32mp-6.6.48-stm32mp-r1-r0/build'
GEN Makefile
CALL /home/vboxuser/STM32MPU-Dev/Developer-Package/stm32mp2-openstlinux-6.6-yocto-scarthgap-mpu-v24.11.06/sources/aarch64-ostl-linux/linux-stm32mp-6.6.48-stm32mp-r1-r0/linux-6.6.48/scripts/checksyscalls.sh
make[3]: *** No rule to make target 'arch/arm64/boot/dts/stm32mp257f-ev1-ca35tdcid-ostl.dtb'. Stop.
Looking for stm32mp257f-ev1-ca35tdcid-ostl.dtb into /home/vboxuser/STM32MPU-Dev/Developer-Package/stm32mp2-openstlinux-6.6-yocto-scarthgap-mpu-v24.11.06/sources/aarch64-ostl-linux/external-dt-6.0-r0/external-dt-6.0-r0/external-dt-6.0/linux
make[3]: *** No rule to make target 'arch/arm64/boot/dts/stm32mp257f-ev1-ca35tdcid-ostl.dtb'. Stop.
make[2]: *** [/home/vboxuser/STM32MPU-Dev/Developer-Package/stm32mp2-openstlinux-6.6-yocto-scarthgap-mpu-v24.11.06/sources/aarch64-ostl-linux/linux-stm32mp-6.6.48-stm32mp-r1-r0/linux-6.6.48/Makefile:1409: stm32mp257f-ev1-ca35tdcid-ostl.dtb] Error 1
make[1]: *** [/home/vboxuser/STM32MPU-Dev/Developer-Package/stm32mp2-openstlinux-6.6-yocto-scarthgap-mpu-v24.11.06/sources/aarch64-ostl-linux/linux-stm32mp-6.6.48-stm32mp-r1-r0/linux-6.6.48/Makefile:234: __sub-make] Error 2
make[1]: Leaving directory '/home/vboxuser/STM32MPU-Dev/Developer-Package/stm32mp2-openstlinux-6.6-yocto-scarthgap-mpu-v24.11.06/sources/aarch64-ostl-linux/linux-stm32mp-6.6.48-stm32mp-r1-r0/build'
make: *** [Makefile:234: __sub-make] Error 2
EXTDT_DIR is /home/vboxuser/STM32MPU-Dev/Developer-Package/stm32mp2-openstlinux-6.6-yocto-scarthgap-mpu-v24.11.06/sources/aarch64-ostl-linux/external-dt-6.0-r0/external-dt-6.0-r0/external-dt-6.0 and it indeed has linux directory inside which has Makefile and the following files:
stm32mp257f-ev1-ca35tdcid-ostl.dts
stm32mp257f-ev1-ca35tdcid-ostl-m33-examples.dts
stm32mp257f-ev1-ca35tdcid-ostl-m33-examples-resmem.dtsi
stm32mp257f-ev1-ca35tdcid-ostl-m33-examples-sram.dts
stm32mp257f-ev1-ca35tdcid-ostl-m33-examples-sram-resmem.dtsi
stm32mp257f-ev1-ca35tdcid-ostl-resmem.dtsi
stm32mp257f-ev1-cm33tdcid-ostl.dts
stm32mp257f-ev1-cm33tdcid-ostl-resmem.dtsi
stm32mp257f-ev1-cm33tdcid-ostl-serial-ca35tdcid.dts
stm32mp257f-ev1-psci-osi.dts
stm32mp257f-ev1-tampers.dts
Also, I'm running the latest Ubuntu version 24.10 on VM if that makes any difference.
I followed everything in ST guide step-by-step, didn't do anything other than what they say, and it still fails. I feel like their guide is definitely missing something, because at the previous steps when they offer to manage source code with git, they tell you to create git repo directly from tarball but never tell you to extract it. They only instruct to extract if you don't want to use git for code management. So, they do make assumptions and I believe this is also the case.
Please, help.
