RE: Problem with Out of Tree Driver Build

zciwor — Wed, 11 Sep 2024 15:17:34 GMT

I was able to figure this out but only by digging deep into the Zephyr Discord. I was missing a `Zephyr` folder in my `drivers` subdirectory with the following `module.yaml`:

name: NAU7802_LOADCELL
build:
  cmake: .
  kconfig: Kconfig
  settings:
    dts_root: .

I then had to update my CMakeLists.txt to the following (note the list(APPEND...) line):

cmake_minimum_required(VERSION 3.20.0)

list(APPEND ZEPHYR_EXTRA_MODULES "${CMAKE_CURRENT_SOURCE_DIR}/drivers")

find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})

project(nau7802-test-delete-me)

target_sources(app PRIVATE src/main.c)

I created a stand alone Github repository with the example that now compiles.

RE: Problem with Out of Tree Driver Build

Menon — Tue, 10 Sep 2024 11:29:28 GMT

Hello,

From the logs you shared, the specific error is an undefined reference to __device_dts_ord_110, which typically means that the linker can't find a symbol that should be defined in the device tree or its associated source files. I recommend following the Zephyr guide on troubleshooting the device tree and checking if any of the steps mentioned will resolve the issue. Please let me know the update.

Kind regards,

Abhijith

RE: Problem with Out of Tree Driver Build

zciwor — Mon, 09 Sep 2024 12:45:19 GMT

I'm sorry, please see updated .zip file. This contains a sample build that fails with the following error:

[167/172] Linking C executable zephyr/zephyr_pre0.elf
FAILED: zephyr/zephyr_pre0.elf zephyr/zephyr_pre0.map /Users/ericpietrowicz/firmware/nau7802-test-delete-me/build/zephyr/zephyr_pre0.map 
: && ccache /opt/nordic/ncs/toolchains/f8037e9b83/opt/zephyr-sdk/arm-zephyr-eabi/bin/arm-zephyr-eabi-gcc  -gdwarf-4 zephyr/CMakeFiles/zephyr_pre0.dir/misc/empty_file.c.obj -o zephyr/zephyr_pre0.elf  zephyr/CMakeFiles/offsets.dir/./arch/arm/core/offsets/offsets.c.obj  -fuse-ld=bfd  -T  zephyr/linker_zephyr_pre0.cmd  -Wl,-Map=/Users/ericpietrowicz/firmware/nau7802-test-delete-me/build/zephyr/zephyr_pre0.map  -Wl,--whole-archive  app/libapp.a  zephyr/libzephyr.a  zephyr/arch/common/libarch__common.a  zephyr/arch/arch/arm/core/libarch__arm__core.a  zephyr/arch/arch/arm/core/cortex_m/libarch__arm__core__cortex_m.a  zephyr/arch/arch/arm/core/mpu/libarch__arm__core__mpu.a  zephyr/lib/libc/picolibc/liblib__libc__picolibc.a  zephyr/lib/libc/common/liblib__libc__common.a  zephyr/soc/soc/nrf52840/libsoc__nordic.a  zephyr/drivers/usb/device/libdrivers__usb__device.a  zephyr/drivers/usb/common/nrf_usbd_common/libdrivers__usb__common__nrf_usbd_common.a  zephyr/drivers/clock_control/libdrivers__clock_control.a  zephyr/drivers/console/libdrivers__console.a  zephyr/drivers/gpio/libdrivers__gpio.a  zephyr/drivers/hwinfo/libdrivers__hwinfo.a  zephyr/drivers/i2c/libdrivers__i2c.a  zephyr/drivers/pinctrl/libdrivers__pinctrl.a  zephyr/drivers/regulator/libdrivers__regulator.a  zephyr/drivers/sensor/nordic/temp/libdrivers__sensor__nordic__temp.a  zephyr/drivers/sensor/st/lsm6dsl/libdrivers__sensor__st__lsm6dsl.a  zephyr/drivers/serial/libdrivers__serial.a  zephyr/drivers/spi/libdrivers__spi.a  zephyr/drivers/timer/libdrivers__timer.a  modules/nrf/drivers/hw_cc3xx/lib..__nrf__drivers__hw_cc3xx.a  modules/hal_nordic/nrfx/libmodules__hal_nordic__nrfx.a  -Wl,--no-whole-archive  zephyr/kernel/libkernel.a  -L"/opt/nordic/ncs/toolchains/f8037e9b83/opt/zephyr-sdk/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/12.2.0/thumb/v7e-m/nofp"  -L/Users/ericpietrowicz/firmware/nau7802-test-delete-me/build/zephyr  -lgcc  zephyr/arch/common/libisr_tables.a  -mcpu=cortex-m4  -mthumb  -mabi=aapcs  -mfp16-format=ieee  -mtp=soft  -Wl,--gc-sections  -Wl,--build-id=none  -Wl,--sort-common=descending  -Wl,--sort-section=alignment  -Wl,-u,_OffsetAbsSyms  -Wl,-u,_ConfigAbsSyms  -nostdlib  -static  -Wl,-X  -Wl,-N  -Wl,--orphan-handling=warn  -Wl,-no-pie  -DPICOLIBC_LONG_LONG_PRINTF_SCANF  /opt/nordic/ncs/v2.7.0/nrfxlib/crypto/nrf_cc310_platform/lib/cortex-m4/soft-float/no-interrupts/libnrf_cc310_platform_0.9.19.a  --specs=picolibc.specs  -lc  -lgcc && cd /Users/ericpietrowicz/firmware/nau7802-test-delete-me/build/zephyr && /opt/nordic/ncs/toolchains/f8037e9b83/Cellar/cmake/3.21.0/bin/cmake -E true
/opt/nordic/ncs/toolchains/f8037e9b83/opt/zephyr-sdk/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/12.2.0/../../../../arm-zephyr-eabi/bin/ld.bfd: app/libapp.a(main.c.obj): in function `main':
/Users/ericpietrowicz/firmware/nau7802-test-delete-me/src/main.c:21: undefined reference to `__device_dts_ord_110'
collect2: error: ld returned 1 exit status
ninja: build stopped: subcommand failed.
FATAL ERROR: command exited with status 1: /opt/nordic/ncs/toolchains/f8037e9b83/bin/cmake --build /Users/ericpietrowicz/firmware/nau7802-test-delete-me/build

devzone.nordicsemi.com/.../6406.nau7802_2D00_test_2D00_delete_2D00_me.zip

RE: Problem with Out of Tree Driver Build

Menon — Mon, 09 Sep 2024 12:26:13 GMT

Hello,

Could you please share the exact error message you're encountering while building? The snippet you provided doesn't give much insight into the issue you're facing. If possible, try attaching the entire build log here. You can use the "Insert" tab to do that.

Kind regards,
Abhijith