Linking examples fails with empty_file.c.obj not found.

[Tage Korsdal Nielsen]

Completed manual*) install of nRF Connect SDK 2.2.0, zephyr-sdk-0.15.1. 

The project is placed in C:\dev\peripheral_nfc_pairing

The SDK in: C:\dev\ncs

Build output:

[244/255] Linking C static library zephyr\kernel\libkernel.a
[245/255] Linking C executable zephyr\zephyr_pre0.elf
FAILED: zephyr/zephyr_pre0.elf zephyr/zephyr_pre0.map C:/dev/peripheral_nfc_pairing/build/zephyr/zephyr_pre0.map
cmd.exe /C "cd . && C:\Users\tnielsen\zephyr-sdk-0.15.1\arm-zephyr-eabi\bin\arm-zephyr-eabi-gcc.exe -gdwarf-4 @CMakeFiles\zephyr_pre0.rsp -o zephyr\zephyr_pre0.elf && cmd.exe /C "cd /D C:\dev\peripheral_nfc_pairing\build\zephyr && "C:\Program Files\CMake\bin\cmake.exe" -E echo ""
c:/users/tnielsen/zephyr-sdk-0.15.1/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/12.1.0/../../../../arm-zephyr-eabi/bin/ld.exe: cannot find zephyr/CMakeFiles/zephyr_pre0.dir/misc/empty_file.c.obj: No such file or directory
collect2.exe: error: ld returned 1 exit status
ninja: build stopped: subcommand failed.

The empty_file.c really is a empty source file - apparently not generating an empty object file.

*) The tool manager would not detect SDK versions above 1.9.1, and found this as an unresolved issue on dev zone, so went with the manual install.

[Tage Korsdal Nielsen]

Turned out the problem is related to multiple instances of cmake on my PC.

If you have multiple cmake instances installed, the one from ncs/toolchain/.... must be first in PATH like this:

C:\dev\bluejay\ble_component\tb>where cmake
C:\ncs\toolchains\v2.2.0\opt\bin\cmake.exe
C:\Program Files\CMake\bin\cmake.exe