make[1]: Entering directory '/srv/build/amery/sunxi/sunxi-nightly/build_u-boot-mainline/build_utoo_p66'
  GEN     ./Makefile
#
# configuration written to .config
#
make[1]: Leaving directory '/srv/build/amery/sunxi/sunxi-nightly/build_u-boot-mainline/build_utoo_p66'
make[1]: Entering directory '/srv/build/amery/sunxi/sunxi-nightly/build_u-boot-mainline/build_utoo_p66'
  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
  PYMOD   scripts/dtc/pylibfdt/_libfdt.so
unable to execute 'swig': No such file or directory
error: command 'swig' failed with exit status 1
/srv/build/amery/sunxi/sunxi-nightly/u-boot-sunxi-mainline/scripts/dtc/pylibfdt/Makefile:26: recipe for target 'scripts/dtc/pylibfdt/_libfdt.so' failed
make[4]: *** [scripts/dtc/pylibfdt/_libfdt.so] Error 1
/srv/build/amery/sunxi/sunxi-nightly/u-boot-sunxi-mainline/scripts/Makefile.build:425: recipe for target 'scripts/dtc/pylibfdt' failed
make[3]: *** [scripts/dtc/pylibfdt] Error 2
/srv/build/amery/sunxi/sunxi-nightly/u-boot-sunxi-mainline/scripts/Makefile.build:425: recipe for target 'scripts/dtc' failed
make[2]: *** [scripts/dtc] Error 2
/srv/build/amery/sunxi/sunxi-nightly/u-boot-sunxi-mainline/Makefile:491: recipe for target 'scripts' failed
make[1]: *** [scripts] Error 2
make[1]: *** Waiting for unfinished jobs....
  UPD     include/config/uboot.release
  CHK     include/config.h
  CFG     u-boot.cfg
make[1]: Leaving directory '/srv/build/amery/sunxi/sunxi-nightly/build_u-boot-mainline/build_utoo_p66'
Makefile:150: recipe for target 'sub-make' failed
make: *** [sub-make] Error 2