GNU Make makefiles recursion reaches outside of Harbour source tree during build

[alcz]

If a file with name known to the build system is placed in a HOME directory of a UNIX system e.g.:
/home/user/runner.prg
Let's make the contents of the file clear, so the demo is obvious:
#error "ITSABUG"
Harbour build is in the
/home/user/harbour
cd /home/user/harbour && make

Harbour build will fail

../../../../../bin/linux/gcc/harbour ../../../../../../runner.prg  -i../../../../../include -n1 -q0 -w3 -es2 -kmo -i- -l
../../../../../../runner.prg(1) Error E0019  #error '"ITSABUG"'
1 error

No code generated.
make[3]: *** [../../../../../config/rules.mk:147: ../../../runner.c] Error 1
make[2]: *** [../../config/lib.mk:68: descend] Error 2
make[1]: *** [../config/dir.mk:71: vm] Error 2
make: *** [config/dir.mk:71: src] Error 2

Quite funny, but i'm not in mood on tackling it now.