nrf_atfifo.c compiler/assembler error

[patrick_m]

I have been working with the Nrf52840, SDK15.2 and Segger Embedded Studio 4.20a using external GNU 7 2017-q4-major.  The project builds without error on the original PC.  I installed Segger Embedded Studio 4.20a and the same GNU tools on another Windows 10 machine and I am getting this error trying to build the same project.

Building ‘Next_G’ from solution ‘Next_G’ in configuration ‘Debug External’

Compiling ‘nrf_atfifo.c’
Assembler messages:
selected processor does not support `pkhbt r2,r2,r1' in Thumb mode
selected processor does not support `pkhbt r3,r3,r3,lsl#16' in Thumb mode
selected processor does not support `pkhbt r2,r1,r2,lsl#16' in Thumb mode
selected processor does not support `pkhtb r3,r3,r3,asr#16' in Thumb mode

I've looked at the project options and I didn't see any differences under GNU Compiler or Assembler settings.

[Vidar Berg]

Hi,

I don't think we have much experience with the use of external toolchains in SES, but you can try to compare the build output from the two PCs to see what the difference is. Maybe it gets built without the -mcpu=cortex-m4 flag on the new PC for some reason? 

Example of a build log with the internal toolchain: