how to use Math.h in nrf connect sdk

[Mr.NCK]

Hi 

 I want to use Sqrt() function from math.h but in my application it triggers some errors. Kindly guide me on how to properly include the math.h library into my application

Thanks & Regards,

Navin

[Mr.NCK]

Hi,

I have attached the error log below. Kindly check and revert back

Fullscreen Math.h_ error.txt Download

Creating solution MLX90632.emProject
D:/v1.7.1/toolchain/opt/bin/cmake.exe -GNinja -DBOARD=nrf5340dk_nrf5340_cpuapp -DBOARD_DIR=D:\v1.7.1\zephyr\boards\arm\nrf5340dk_nrf5340 -BD:\v1.7.1\zephyr\samples\My_Projects\MLX90632\build_nrf5340dk_nrf5340_cpuapp -SD:\v1.7.1\zephyr\samples\My_Projects\MLX90632 -DNCS_TOOLCHAIN_VERSION=1.7.1 -DDTC_OVERLAY_FILE=D:/v1.7.1/zephyr/samples/My_Projects/MLX90632/nrf5340dk_nrf5340_cpuapp.overlay -DEXTRA_KCONFIG_TARGETS=menuconfig_ses -DEXTRA_KCONFIG_TARGET_COMMAND_FOR_menuconfig_ses=D:\v1.7.1\toolchain\segger_embedded_studio/html/configure_nordic_project_menuconfig.py
-- Application: D:/v1.7.1/zephyr/samples/My_Projects/MLX90632
-- Zephyr version: 2.6.99 (D:/v1.7.1/zephyr), build: v2.6.99-ncs1-1
-- Found Python3: D:/v1.7.1/toolchain/opt/bin/python.exe (found suitable exact version "3.8.2") found components: Interpreter 
-- Found west (found suitable version "0.11.1", minimum required is "0.7.1")
-- Board: nrf5340dk_nrf5340_cpuapp
-- Cache files will be written to: D:/v1.7.1/zephyr/.cache
-- Found dtc: D:/v1.7.1/toolchain/opt/bin/dtc.exe (found suitable version "1.4.7", minimum required is "1.4.6")
-- Found toolchain: gnuarmemb (D:/v1.7.1/toolchain/opt)
-- Found BOARD.dts: D:/v1.7.1/zephyr/boards/arm/nrf5340dk_nrf5340/nrf5340dk_nrf5340_cpuapp.dts
-- Found devicetree overlay: D:/v1.7.1/zephyr/samples/My_Projects/MLX90632/nrf5340dk_nrf5340_cpuapp.overlay
-- Generated zephyr.dts: D:/v1.7.1/zephyr/samples/My_Projects/MLX90632/build_nrf5340dk_nrf5340_cpuapp/zephyr/zephyr.dts
-- Generated devicetree_unfixed.h: D:/v1.7.1/zephyr/samples/My_Projects/MLX90632/build_nrf5340dk_nrf5340_cpuapp/zephyr/include/generated/devicetree_unfixed.h
-- Generated device_extern.h: D:/v1.7.1/zephyr/samples/My_Projects/MLX90632/build_nrf5340dk_nrf5340_cpuapp/zephyr/include/generated/device_extern.h
-- Including generated dts.cmake file: D:/v1.7.1/zephyr/samples/My_Projects/MLX90632/build_nrf5340dk_nrf5340_cpuapp/zephyr/dts.cmake
Parsing D:/v1.7.1/zephyr/Kconfig
Loaded configuration 'D:/v1.7.1/zephyr/boards/arm/nrf5340dk_nrf5340/nrf5340dk_nrf5340_cpuapp_defconfig'
Merged configuration 'D:/v1.7.1/zephyr/samples/My_Projects/MLX90632/prj.conf'
-- Configuring incomplete, errors occurred!
Including boilerplate (Zephyr base): D:/v1.7.1/zephyr/cmake/app/boilerplate.cmake
-- Using NCS Toolchain 1.7.1 for building. (D:/v1.7.1/toolchain/cmake)

D:/v1.7.1/zephyr/samples/My_Projects/MLX90632/prj.conf:16: warning: ignoring malformed line ' CONFIG_NEWLIB_LIBC=y'

error: Aborting due to Kconfig warnings

CMake Error at D:/v1.7.1/zephyr/cmake/kconfig.cmake:268 (message):
  command failed with return code: 1
Call Stack (most recent call first):
  D:/v1.7.1/zephyr/cmake/app/boilerplate.cmake:554 (include)
  D:/v1.7.1/zephyr/share/zephyr-package/cmake/ZephyrConfig.cmake:24 (include)
  D:/v1.7.1/zephyr/share/zephyr-package/cmake/ZephyrConfig.cmake:35 (include_boilerplate)
  CMakeLists.txt:9 (find_package)



error: cmake failed
create_nordic_project.py failed (1)

Thanks,

Navin

[AHaug]

Hi,

The error you are getting could be due to the malformed line in your prj.conf (line 24), where there is a whitespace in line 24 where you've written

' CONFIG_NEWLIB_LIBC=y', instead of 'CONFIG_NEWLIB_LIBC=y'.

Let me know if this worked out.

Kind regards,
Andreas

[Mr.NCK]

HI andreas,

 THank you so much, ITs working.