undefined reference to `nrfx_twim_init'

Question

Good morning: 
 I'm trying to develop the twi_scanner with the nrfx libraries. Everything seems to compile fine, but at the end of the Build process I get: 
 
 d:/ncs/v1.9.1/toolchain/opt/bin/../lib/gcc/arm-none-eabi/9.2.1/../../../../arm-none-eabi/bin/ld.exe: app/libapp.a(main.c.obj): in function `main': D:
rfsrc	wi\scanner_nrfx\src\main.c:119: undefined reference to `nrfx_twim_init' d:/ncs/v1.9.1/toolchain/opt/bin/../lib/gcc/arm-none-eabi/9.2.1/../../../../arm-none-eabi/bin/ld.exe: D:
rfsrc	wi\scanner_nrfx\src\main.c:120: undefined reference to `nrfx_twim_enable' d:/ncs/v1.9.1/toolchain/opt/bin/../lib/gcc/arm-none-eabi/9.2.1/../../../../arm-none-eabi/bin/ld.exe: D:
rfsrc	wi\scanner_nrfx\src\main.c:130: undefined reference to `nrfx_twim_is_busy' d:/ncs/v1.9.1/toolchain/opt/bin/../lib/gcc/arm-none-eabi/9.2.1/../../../../arm-none-eabi/bin/ld.exe: D:
rfsrc	wi\scanner_nrfx\src\main.c:139: undefined reference to `nrfx_twim_xfer' 
 
 So, it seems that I have included fine #include <nrfx_twim.h> but haven't configured the project proprerly to find the libraries (although I think I have checked all the references to nrfx amd TWIM in Kconfig). 
 Just in case you need it, my CMakeLists.txt file: 
 
 # 
 # Copyright (c) 2018 Nordic Semiconductor 
 # 
 # SPDX-License-Identifier: LicenseRef-Nordic-5-Clause 
 # 
 cmake_minimum_required (VERSION 3.20.0) 
 
 find_package (Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE} ) 
 project (NONE) 
 
 # NORDIC SDK APP START 
 target_sources (app PRIVATE 
 src/main.c 
 src/buttons_and_leds.c 
 ) 
 
 # NORDIC SDK APP END 
 
 zephyr_library_include_directories(.)

Could anyone help me? Thank you, 
 David.

user107544 · Accepted Answer

Hi there: 
 I finally got the program to build. Not really sure which was the key change :( (I was changing some configurations) but I think it was: 
 
 CONFIG_NRFX_TWIM0 =y 
 
 in prj.conf 
 
 Regards, 
 David.

undefined reference to `nrfx_twim_init'

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