[root@bluewater linux-3.18.39]# make scripts/kconfig/conf --silentoldconfig Kconfig CHK include/config/kernel.release CHK include/generated/uapi/linux/version.h CHK include/generated/utsrelease.h CALL scripts/checksyscalls.sh CHK include/generated/compile.h kernel/Makefile:133: *** No X.509 certificates found *** BC kernel/time/timeconst.h /bin/sh: bc: command not found make[2]: *** [kernel/time/Makefile:32: kernel/time/timeconst.h] Error 127 make[1]: *** [scripts/Makefile.build:402: kernel/time] Error 2 make: *** [Makefile:938: kernel] Error 2