树莓派预编译报如下错误：
pi@raspberrypi:/lib/modules/4.4.7+/build $ sudo make modules_prepare HOSTCC scripts/basic/fixdep HOSTCC scripts/kconfig/conf.o SHIPPED scripts/kconfig/zconf.tab.c SHIPPED scripts/kconfig/zconf.lex.c SHIPPED scripts/kconfig/zconf.hash.c HOSTCC scripts/kconfig/zconf.tab.o HOSTLD scripts/kconfig/conf scripts/kconfig/conf --silentoldconfig Kconfig CHK include/config/kernel.release UPD include/config/kernel.release WRAP arch/arm/include/generated/asm/bitsperlong.h WRAP arch/arm/include/generated/asm/cputime.h WRAP arch/arm/include/generated/asm/current.h WRAP arch/arm/include/generated/asm/emergency-restart.h WRAP arch/arm/include/generated/asm/errno.h WRAP arch/arm/include/generated/asm/exec.h WRAP arch/arm/include/generated/asm/ioctl.h WRAP arch/arm/include/generated/asm/ipcbuf.h WRAP arch/arm/include/generated/asm/irq_regs.h WRAP arch/arm/include/generated/asm/kdebug.h WRAP arch/arm/include/generated/asm/local.h WRAP arch/arm/include/generated/asm/local64.h WRAP arch/arm/include/generated/asm/mm-arch-hooks.h WRAP arch/arm/include/generated/asm/msgbuf.h WRAP arch/arm/include/generated/asm/msi.h WRAP arch/arm/include/generated/asm/param.h WRAP arch/arm/include/generated/asm/parport.h WRAP arch/arm/include/generated/asm/poll.h WRAP arch/arm/include/generated/asm/preempt.h WRAP arch/arm/include/generated/asm/resource.h WRAP arch/arm/include/generated/asm/rwsem.h WRAP arch/arm/include/generated/asm/seccomp.h WRAP arch/arm/include/generated/asm/sections.h WRAP arch/arm/include/generated/asm/segment.h WRAP arch/arm/include/generated/asm/sembuf.h WRAP arch/arm/include/generated/asm/serial.h WRAP arch/arm/include/generated/asm/shmbuf.h WRAP arch/arm/include/generated/asm/siginfo.h WRAP arch/arm/include/generated/asm/simd.h WRAP arch/arm/include/generated/asm/sizes.h WRAP arch/arm/include/generated/asm/socket.h WRAP arch/arm/include/generated/asm/sockios.h WRAP arch/arm/include/generated/asm/termbits.h WRAP arch/arm/include/generated/asm/termios.h WRAP arch/arm/include/generated/asm/timex.h WRAP arch/arm/include/generated/asm/trace_clock.h WRAP arch/arm/include/generated/asm/unaligned.h CHK include/generated/uapi/linux/version.h UPD include/generated/uapi/linux/version.h CHK include/generated/utsrelease.h UPD include/generated/utsrelease.h HOSTCC scripts/basic/bin2c Generating include/generated/mach-types.h CC kernel/bounds.s CHK include/generated/bounds.h UPD include/generated/bounds.h CHK include/generated/timeconst.h /bin/sh: 1: bc: not found Kbuild:66: recipe for target 'include/generated/timeconst.h' failed make[1]: *** [include/generated/timeconst.h] Error 127 Makefile:986: recipe for target 'prepare0' failed make: *** [prepare0] Error 2 pi@raspberrypi:/lib/modules/4.4.7+/build $ sudo su root@raspberrypi:/usr/src/linux-rpi-4.4.y # make modules_prepare CHK include/config/kernel.release CHK include/generated/uapi/linux/version.h CHK include/generated/utsrelease.h make[1]: 'include/generated/mach-types.h' is up to date. CHK include/generated/bounds.h CHK include/generated/timeconst.h /bin/sh: 1: bc: not found Kbuild:66: recipe for target 'include/generated/timeconst.h' failed make[1]: *** [include/generated/timeconst.h] Error 127 Makefile:986: recipe for target 'prepare0' failed make: *** [prepare0] Error 2 root@raspberrypi:/usr/src/linux-rpi-4.4.y #
解决方法：
sudo apt-get install bc
再重新预编译即可。
注意：本文归作者所有，未经作者允许，不得转载
