make -C /home/viresh/work/repos/ara/db3/kernel-only/out/arche-6.0 M=/home/viresh/all/work/repos/ara/greybus
make -C tools KERNELDIR=/home/viresh/all/work/repos/ara/db3/kernel-only/out/arche-6.0
make[1]: Entering directory `/home/viresh/all/work/repos/ara/db3/kernel-only/out/arche-6.0'
make[1]: Entering directory `/home/viresh/all/work/repos/ara/greybus/tools'
  TARGET_CC loopback_test.o
loopback_test.c:9:19: fatal error: errno.h: No such file or directory
 #include <errno.h>
                   ^
compilation terminated.
make[1]: *** [loopback_test.o] Error 1
make[1]: Leaving directory `/home/viresh/all/work/repos/ara/greybus/tools'
make: *** [tools] Error 2
make: *** Waiting for unfinished jobs....