lfs:/mnt/lfs/sources/linux-3.13.6$ make mrproper
  CLEAN   arch/x86/tools
  CLEAN   scripts/basic
  CLEAN   scripts
  CLEAN   usr/include include/generated arch/x86/include/generated
  CLEAN   include/generated/uapi/linux/version.h
lfs:/mnt/lfs/sources/linux-3.13.6$ make headers_check
  CHK     include/generated/uapi/linux/version.h
  UPD     include/generated/uapi/linux/version.h
  HOSTCC  scripts/basic/fixdep
  WRAP    arch/x86/include/generated/asm/clkdev.h
  SYSHDR  arch/x86/syscalls/../include/generated/uapi/asm/unistd_32.h
  SYSHDR  arch/x86/syscalls/../include/generated/uapi/asm/unistd_64.h
  SYSHDR  arch/x86/syscalls/../include/generated/uapi/asm/unistd_x32.h
  SYSTBL  arch/x86/syscalls/../include/generated/asm/syscalls_32.h
  HOSTCC  arch/x86/tools/relocs_32.o
  HOSTCC  arch/x86/tools/relocs_64.o
  HOSTCC  arch/x86/tools/relocs_common.o
  HOSTLD  arch/x86/tools/relocs
  HOSTCC  scripts/unifdef
  INSTALL include/drm (18 files)
  INSTALL include/asm-generic (35 files)
  INSTALL include/mtd (5 files)
  INSTALL include/linux/byteorder (2 files)
  INSTALL include/linux/caif (2 files)
  INSTALL include/rdma (6 files)
  INSTALL include/linux/can (5 files)
  INSTALL include/linux/dvb (8 files)
  INSTALL include/scsi/fc (4 files)
  INSTALL include/scsi (3 files)
  INSTALL include/linux/hdlc (1 file)
  INSTALL include/sound (11 files)
  INSTALL include/video (3 files)
  INSTALL include/linux/hsi (1 file)
  INSTALL include/linux/isdn (1 file)
  INSTALL include/xen (2 files)
  INSTALL include/uapi (0 file)
  INSTALL include/linux/mmc (1 file)
  INSTALL include/linux/netfilter/ipset (4 files)
  INSTALL include/linux/netfilter_arp (2 files)
  INSTALL include/linux/netfilter_bridge (18 files)
  INSTALL include/linux/netfilter_ipv4 (10 files)
  INSTALL include/linux/netfilter (82 files)
  INSTALL include/linux/netfilter_ipv6 (12 files)
  INSTALL include/linux/nfsd (5 files)
  INSTALL include/linux/raid (2 files)
  INSTALL include/linux/spi (1 file)
  INSTALL include/linux/sunrpc (1 file)
  INSTALL include/linux/tc_act (8 files)
  INSTALL include/linux/tc_ematch (4 files)
  INSTALL include/linux/usb (10 files)
  INSTALL include/linux/wimax (1 file)
  INSTALL include/linux (390 files)
  INSTALL include/asm (64 files)
  CHECK   include/drm (18 files)
  CHECK   include/asm-generic (35 files)
xargs: perl: No such file or directory
make[2]: *** [/mnt/lfs/sources/linux-3.13.6/usr/include/drm/.check] Error 127
xargs: perl: No such file or directory
make[2]: *** [/mnt/lfs/sources/linux-3.13.6/usr/include/asm-generic/.check] Error 127
make[1]: *** [asm-generic] Error 2
make[1]: *** Waiting for unfinished jobs....
make[1]: *** [drm] Error 2
  CHECK   include/linux/caif (2 files)
  CHECK   include/linux/byteorder (2 files)
xargs: perl: No such file or directory
xargs: perl: No such file or directory
make[3]: *** [/mnt/lfs/sources/linux-3.13.6/usr/include/linux/byteorder/.check] Error 127
make[2]: *** [byteorder] Error 2
make[2]: *** Waiting for unfinished jobs....
  CHECK   include/linux/dvb (8 files)
make[3]: *** [/mnt/lfs/sources/linux-3.13.6/usr/include/linux/caif/.check] Error 127
make[2]:   CHECK   include/linux/can (5 files)
*** [caif] Error 2
xargs: perl: No such file or directory
make[3]: *** [/mnt/lfs/sources/linux-3.13.6/usr/include/linux/can/.check] Error 127
make[2]: *** [can] Error 2
xargs: perl: No such file or directory
make[3]: *** [/mnt/lfs/sources/linux-3.13.6/usr/include/linux/dvb/.check] Error 127
make[2]: *** [dvb] Error 2
make[1]: *** [linux] Error 2
make: *** [headers_check] Error 2