Quite many people found the message “Missing Separator Error” when building GCCE target. Usually this happens because the path to GNU CSL ARM compiler is not correct. The line that causes the problem is usually generated by cl_bpabi.pm, in sub GCCLibPath. The subroutine will try to execute this:

arm-none-symbianelf-g++ -print-libgcc-file-name

to find the path to GCC include files.

So in case anyone else is having the same “missing separator. Stop”,
just check if you can run:

arm-none-symbianelf-g++

If you can not run it, then somehow “arm-none-symbianelf-g++.exe” is not
on the path or the path that you set in the system is wrong/mistyped.