Error loading Zephyr on nRF52840DK using Segger Embedded Studio

[Adam]

Hi,

It seems I'm running into the fairly common "solution load command failed (1)" error on a nRF42840DK board.

The console output in Segger gives me the following:

Loading solution asset_tracker.emProject
Executing load commands
cmake -GNinja -DBOARD=nrf52840_pca10056 -DBOARD_DIR=C:/nrf5sdk/ncs/zephyr/boards/arm/nrf52840_pca10056 -DZEPHYR_TOOLCHAIN_VARIANT=gnuarmemb -DGNUARMEMB_TOOLCHAIN_PATH=C:/gnuarmemb -BC:/nrf5sdk/ncs/nrf/applications/asset_tracker/build_nrf52840_pca10056 -HC:/nrf5sdk/ncs/nrf/applications/asset_tracker -DEXTRA_KCONFIG_TARGETS=menuconfig_ses -DEXTRA_KCONFIG_TARGET_COMMAND_FOR_menuconfig_ses=C:/SES/v420a/html/configure_nordic_project_menuconfig.py
-- Using application from 'C:/nrf5sdk/ncs/nrf/applications/asset_tracker'
Zephyr version: 1.14.99
-- Selected BOARD nrf52840_pca10056
-- Found west: C:/Python37/Scripts/west.exe (found suitable version "0.6.0", minimum required is "0.5.6")
-- Cache files will be written to: C:\Users\SBiz\AppData\Local/.cache/zephyr
USING OUT OF TREE BOARD
-- Loading C:/nrf5sdk/ncs/zephyr/boards/arm/nrf52840_pca10056/nrf52840_pca10056.dts as base
-- Overlaying C:/nrf5sdk/ncs/zephyr/dts/common/common.dts
Parsing Kconfig tree in C:/nrf5sdk/ncs/nrf/applications/asset_tracker/Kconfig

warning: the value '' is invalid for FLIP_INPUT (defined at C:/nrf5sdk/ncs/nrf/applications/asset_tracker/Kconfig:116), which has type int -- assignment ignored

warning: the value '' is invalid for TEMP_SIM_BUTTON (defined at C:/nrf5sdk/ncs/nrf/applications/asset_tracker/Kconfig:264), which has type int -- assignment ignored

Loading C:/nrf5sdk/ncs/nrf/applications/asset_tracker/build_nrf52840_pca10056/zephyr/.config as base
warning: BSD_LIBRARY (defined at ..\nrf\lib\bsdlib\Kconfig:8) has direct dependencies TRUSTED_EXECUTION_NONSECURE with value n, but is currently being y-selected by the following symbols:
- MODEM_INFO (defined at ..\nrf\lib\modem_info\Kconfig:7), with value y, direct dependencies "y" (value: y)

Error: Aborting due to non-whitelisted Kconfig warning 'warning: the value '' is invalid for
FLIP_INPUT (defined at C:/nrf5sdk/ncs/nrf/applications/asset_tracker/Kconfig:116), which has type
int -- assignment ignored'. Note: If this warning doesn't point to an actual problem, you can add it
to the whitelist at the top of C:/nrf5sdk/ncs/zephyr/scripts/kconfig/kconfig.py.

CMake Error at C:/nrf5sdk/ncs/zephyr/cmake/kconfig.cmake:200 (message):
command failed with return code: 1
Call Stack (most recent call first):
C:/nrf5sdk/ncs/zephyr/cmake/app/boilerplate.cmake:529 (include)
CMakeLists.txt:11 (include)

-- Configuring incomplete, errors occurred!
See also "C:/nrf5sdk/ncs/nrf/applications/asset_tracker/build_nrf52840_pca10056/CMakeFiles/CMakeOutput.log".
See also "C:/nrf5sdk/ncs/nrf/applications/asset_tracker/build_nrf52840_pca10056/CMakeFiles/CMakeError.log".
Project load failed
Reported error: solution load command failed (1)

The CMakeOutput.log contains the following information:

The target system is: Generic - 1.14.99 - arm
The host system is: Windows - 10.0.18362 - AMD64
Compiling the C compiler identification source file "CMakeCCompilerId.c" succeeded.
Compiler: C:/gnuarmemb/bin/arm-none-eabi-gcc.exe
Build flags:
Id flags: -c

The output was:
0

Compilation of the C compiler identification source "CMakeCCompilerId.c" produced "CMakeCCompilerId.o"

The C compiler identification is GNU, found in "C:/nrf5sdk/ncs/nrf/applications/asset_tracker/build_nrf52840_pca10056/CMakeFiles/3.15.2/CompilerIdC/CMakeCCompilerId.o"

Compiling the CXX compiler identification source file "CMakeCXXCompilerId.cpp" succeeded.
Compiler: C:/gnuarmemb/bin/arm-none-eabi-gcc.exe
Build flags:
Id flags: -c

The output was:
0

Compilation of the CXX compiler identification source "CMakeCXXCompilerId.cpp" produced "CMakeCXXCompilerId.o"

The CXX compiler identification is GNU, found in "C:/nrf5sdk/ncs/nrf/applications/asset_tracker/build_nrf52840_pca10056/CMakeFiles/3.15.2/CompilerIdCXX/CMakeCXXCompilerId.o"

Checking whether the ASM compiler is GNU using "--version" matched "(GNU assembler)|(GCC)|(Free Software Foundation)":
arm-none-eabi-gcc.exe (GNU Tools for Arm Embedded Processors 7-2018-q2-update) 7.3.1 20180622 (release) [ARM/embedded-7-branch revision 261907]
Copyright (C) 2017 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Performing C SOURCE FILE Test toolchain_is_ok succeeded with the following output:
Change Dir: C:/nrf5sdk/ncs/nrf/applications/asset_tracker/build_nrf52840_pca10056/CMakeFiles/CMakeTmp

Run Build Command(s):C:/ProgramData/chocolatey/bin/ninja.exe cmTC_8cbfe && [1/2] Building C object CMakeFiles/cmTC_8cbfe.dir/src.c.obj
[2/2] Linking C executable cmTC_8cbfe
c:/gnuarmemb/bin/../lib/gcc/arm-none-eabi/7.3.1/../../../../arm-none-eabi/bin/ld.exe: warning: cannot find entry symbol _start; defaulting to 00008000

Source file was:
int main(void) { return 0; }

And the CMakeError.log contains:

Compiling the C compiler identification source file "CMakeCCompilerId.c" failed.
Compiler: C:/gnuarmemb/bin/arm-none-eabi-gcc.exe
Build flags:
Id flags:

The output was:
1
c:/gnuarmemb/bin/../lib/gcc/arm-none-eabi/7.3.1/../../../../arm-none-eabi/lib\libc.a(lib_a-exit.o): In function `exit':
exit.c:(.text.exit+0x2c): undefined reference to `_exit'
collect2.exe: error: ld returned 1 exit status

Compiling the CXX compiler identification source file "CMakeCXXCompilerId.cpp" failed.
Compiler: C:/gnuarmemb/bin/arm-none-eabi-gcc.exe
Build flags:
Id flags:

The output was:
1
c:/gnuarmemb/bin/../lib/gcc/arm-none-eabi/7.3.1/../../../../arm-none-eabi/lib\libc.a(lib_a-exit.o): In function `exit':
exit.c:(.text.exit+0x2c): undefined reference to `_exit'
collect2.exe: error: ld returned 1 exit status

I'm fairly new to this toolchain so I'm not entirely sure what's going on at this point. Everything was installed by following the instructions found at https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/gs_ins_windows.htm.

One other thing I keep getting is this notification every time I load Segger:

I'm not sure if it is related in any way to the issue above.

Any advice is much appreciated.

[Heidi-Irene Harvey Sollie]

Hi!

The nRF Connect SDK does not support nRF52840, only nRF9160. To use Zephyr samples on the nRF52 series, please follow this guide. More information can be in this link, and as stated in the bottom of the page: "Also if you want to get involved with Zephyr, or simply need help as a user, you can join the Zephyr mailing list or join the #zephyrproject IRC channel."

Nordic Semiconductor is part of the Zephyr Project and contributes with misc. components/software, but we do not give support for Zephyr running on nRF52840.  

Thanks for your understanding. 

Best regards,

Heidi

[Adam]

OK, I suppose I was confused as the release notes list the PCA10056 under "supported boards", but given what you stated, that isn't true as far as running Zephyr goes?

Thanks

[Heidi-Irene Harvey Sollie]

Yes, that is a good observation. The Zephyr kernel architecture supports multiple architectures, including ARM Cortex-M, Intel x86, ARC, Nios II, Tensilica Xtensa, and RISC-V, and a large number of supported boards, which is why those same boards are listed in the release notes.

Unfortunately, Nordic only offers development support on the nRF9160DK at this time.

You could try asking the Zephyr community for help. Zephyr's Slack workspace is https://zephyrproject.slack.com. Use this Slack Invite to register.

Best regards,

Heidi