Build nRF Connect SDK Project via Command Line

[Jack Panetta]

Hi,

I'm working on an application for the nRF9160 using the nRF Connect SDK. I want to integrate this app into our build system and thus would like to be able to build the project via the command line. One thing I'm concerned about is what operations Segger EM Studio is doing behind the scenes when you click "Open nRF Connect SDK Project... ". Doing this links all of the Zephyr files as well as the GNU ARM Embedded Toolchain files.

So my question is, Is there a way to replicate this on our build server using the command line?

- Jack

[Martin Lesund]

Hi Jack,

Just adding to what jbrzozoski is referring to:

---

• When using the command line you need to define the environment variables for the GNU Arm Embedded toolchain:

export ZEPHYR_TOOLCHAIN_VARIANT=gnuarmemb
export GNUARMEMB_TOOLCHAIN_PATH=/c/gnuarmemb

• Set up build environment

cd $NCS_BASE/zephyr
source zephyr-env.sh

• To build and flash the application using ninja (you can also use cmake to build with make instead of ninja)

cd $NCS_BASE/nrf/samples/nrf9160/mqtt_simple/
mkdir build && cd build

# Use cmake to configure a Ninja-based build system:
cmake -GNinja -DBOARD=nrf9160_pca10090ns ..

# Now run ninja on the generated build system:
ninja
ninja flash

Also worth noticing that there is a difference when building Secure/Non-Secure Zephyr applications.

---

Extra tip:

To flash precompiled .hex files you can either use the nRF Connect Programmer application or do it via command line nrfjprog:

nrfjprog --program <application>.hex -f nrf91 --sectorerase -r --verify

Best Regards,
Martin L.

[Marco Esposito]

Hi, I'm trying to build the coap_client application using the command line on Windows since I'm having problems using Segger.
I already flashed the Secure Boot, now I'm trying using this commands

cd C:\Nordic_SDK\ncs\zephyr

zephyr-env.cmd

set ZEPHYR_TOOLCHAIN_VARIANT=gnuarmemb

set GNUARMEMB_TOOLCHAIN_PATH = “C:\Program Files (x86)\GNU Tools ARM Embedded\8 2018-q4-major”

cd C:\Nordic_SDK\ncs\nrf\samples\nrf9160\coap_client

mkdir build && cd build

cmake .. -DBOARD=nrf9160_pca10090ns -GNinja

ninja flash

But then it reports the following message

C:\Nordic_SDK\ncs\nrf\samples\nrf9160\coap_client\build>cmake .. -DBOARD=nrf9160_pca10090ns -GNinja
Zephyr version: 1.14.0
-- Found PythonInterp: C:/Python37/python.exe (found suitable version "3.7.2", minimum required is "3.4")
-- Selected BOARD nrf9160_pca10090ns
CMake Error at C:/Nordic_SDK/ncs/zephyr/cmake/extensions.cmake:1104 (message):
Assertion failed: GNUARMEMB_TOOLCHAIN_PATH is not set
Call Stack (most recent call first):
C:/Nordic_SDK/ncs/zephyr/cmake/toolchain/gnuarmemb/generic.cmake:11 (assert)
C:/Nordic_SDK/ncs/zephyr/cmake/generic_toolchain.cmake:55 (include)
C:/Nordic_SDK/ncs/zephyr/cmake/app/boilerplate.cmake:395 (include)
CMakeLists.txt:9 (include)

It says that the Toolchain Path is not set but I set it with the Gnuarmemb Path I set in the Getting Started Assistant to verify if the Toolchain was correctly installed. Do I have to set a different path?

Thanks in advance for any clarification you can give me.

On a side note, will it be possible to build projects using Segger soon? Everytime I try to build a project it gives me an error unless I switch to the v3.0.0 release and then it works.

[Martin Lesund]

Hi Marco,

Does this happen for every sample?

If not, then there may be an issue with the build files.

Please clean the folder:

rm *-r

and try to build again.

---

Another suggestion is to update the master branch in the nrf repo.

git pull

And the rest of the repoes (easiest if you have west).

west update

---

Extra tip:

Optional, you can use the West tool to build/flash applications as well.

#using west to build
west build -b nrf9160_pca10090ns -d build

#using west to flash
west flash -d build

(b = board; d = directory)

(another neat thing when using west is that you do not need to set up the build environment before you build the application)

[Marco Esposito]

Hi, thanks again for the help.

I tried reinstalling the SDK and checked out if all the repositories were up to date, then I used west to build both the secure_boot sample and the at_client but I got the same result. This is what I get with the secure_boot (same error as when using cmake and ninja).

Could it be a problem with my computer and not with the build files?

[Martin Lesund]

• Does this happen for every sample?
• Can you confirm the build folder is clean?

[Marco Esposito]

Yes, it does happen for every sample and the build folder is clean.

Here is my input (here I was building the coap_client)

and I get the same result

With this CMakeError file written in the build folder

Fullscreen CMakeError.log Download

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

[Martin Lesund]

Hi Marco, 
I appreciate that you have made a seperate ticket for your issue since it's unrelated to the original post.
I will follow up the other case!

Best Regards,

Martin L.