include/config.h

scripts/kconfig/conf  --silentoldconfig Kconfig
  CHK     include/config.h
  CFG     u-boot.cfg
  GEN     include/autoconf.mk
  GEN     include/autoconf.mk.dep
  CHK     include/config/uboot.release
  CHK     include/generated/version_autogenerated.h
  CHK     include/generated/timestamp_autogenerated.h
  UPD     include/generated/timestamp_autogenerated.h
  CHK     include/generated/generic-asm-offsets.h
  CHK     include/generated/asm-offsets.h
  PYMOD   scripts/dtc/pylibfdt/_libfdt.so
unable to execute 'swig': No such file or directory
error: command 'swig' failed with exit status 1
scripts/dtc/pylibfdt/Makefile:26: recipe for target 'scripts/dtc/pylibfdt/_libfdt.so' failed
make[3]: *** [scripts/dtc/pylibfdt/_libfdt.so] Error 1
scripts/Makefile.build:425: recipe for target 'scripts/dtc/pylibfdt' failed
make[2]: *** [scripts/dtc/pylibfdt] Error 2
scripts/Makefile.build:425: recipe for target 'scripts/dtc' failed
make[1]: *** [scripts/dtc] Error 2
Makefile:491: recipe for target 'scripts' failed
make: *** [scripts] Error 2