make[1]: Entering directory '/srv/build/amery/sunxi/sunxi-nightly/build_u-boot-mainline/build_icnova-a20-swac'
  GEN     ./Makefile
#
# configuration written to .config
#
make[1]: Leaving directory '/srv/build/amery/sunxi/sunxi-nightly/build_u-boot-mainline/build_icnova-a20-swac'
make[1]: Entering directory '/srv/build/amery/sunxi/sunxi-nightly/build_u-boot-mainline/build_icnova-a20-swac'
  GEN     ./Makefile
scripts/kconfig/conf  --silentoldconfig Kconfig
  CHK     include/config.h
  CFG     u-boot.cfg
  GEN     include/autoconf.mk.dep
  CFG     spl/u-boot.cfg
  GEN     include/autoconf.mk
  GEN     spl/include/autoconf.mk
*** Your GCC is older than 6.0 and will not be supported starting in v2018.01.
  CHK     include/config/uboot.release
  CHK     include/generated/timestamp_autogenerated.h
  GEN     ./Makefile
  UPD     include/generated/timestamp_autogenerated.h
  CHK     include/config.h
  CFG     u-boot.cfg
  UPD     include/config/uboot.release
  Using /srv/build/amery/sunxi/sunxi-nightly/u-boot-sunxi-mainline as source for U-Boot
  CHK     include/generated/version_autogenerated.h
  UPD     include/generated/version_autogenerated.h
  CHK     include/generated/generic-asm-offsets.h
  CHK     include/generated/asm-offsets.h
  HOSTCC  tools/mkenvimage.o
  HOSTCC  tools/fit_image.o
  HOSTCC  tools/image-host.o
  HOSTCC  tools/dumpimage.o
  HOSTCC  tools/mkimage.o
  HOSTCC  tools/sunxi-spl-image-builder.o
  HOSTLD  tools/mkenvimage
  HOSTLD  tools/sunxi-spl-image-builder
  HOSTLD  tools/dumpimage
  HOSTLD  tools/mkimage
  CC      common/main.o
  CC      cmd/version.o
  CC      drivers/video/cfb_console.o
  LD      cmd/built-in.o
  LD      common/built-in.o
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: No module named libfdt

*** binman needs the Python libfdt library.
*** Either install it on your system, or try:
***
*** sudo apt-get install swig libpython-dev
***
*** to have U-Boot build its own version.
/srv/build/amery/sunxi/sunxi-nightly/u-boot-sunxi-mainline/Makefile:1383: recipe for target 'checkbinman' failed
make[1]: *** [checkbinman] Error 1
make[1]: *** Waiting for unfinished jobs....
  CC      lib/smbios.o
  CC      lib/display_options.o
  CC      lib/efi_loader/helloworld.o
  LD      drivers/video/built-in.o
  LD      drivers/built-in.o
  LD      lib/efi_loader/helloworld_efi.so
  OBJCOPY lib/efi_loader/helloworld.efi
rm lib/efi_loader/helloworld_efi.so lib/efi_loader/helloworld.o
  LD      lib/built-in.o
make[1]: Leaving directory '/srv/build/amery/sunxi/sunxi-nightly/build_u-boot-mainline/build_icnova-a20-swac'
Makefile:150: recipe for target 'sub-make' failed
make: *** [sub-make] Error 2