The error log is:
(...)
gcc -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer -I/usr/src/bk-benh/arch/ppc -DLOCALE -DCURSES_LOC="<ncurses.h>" -c -o checklist.o checklist.c checklist.c:24: dialog.h: No such file or directory make[1]: *** [checklist.o] Error 1
(...)
It seems that you don't have libncurses5-dev installed... make menuconfig depends on those headers for compilation.
Hope this helps, Roger...