-m68000 -Werror -mshort -g -O2 -fomit-frame-pointer -Wall
-Wmissing-prototypes -Winline -Wshadow -Wpointer-arith -Wcast-qual
-c ../k_shutdown.c -o k_shutdown.o
cc1: warnings being treated as errors
../k_shutdown.c: In function 'k_shutdown':
../k_shutdown.c:73:52: error: new qualifiers in middle of multi-level
non-const cast are unsafe
Well known problem with -Werror.... try to remove it from Makefile(s) and try again. This one is really annoying, once 4.x compilation is fixed and 2.x is broken or vice versa. There must be some common solution...