[U-Boot] Building fw_printenv (e.g. make env) failing

[Marcel Ziswiler]

Quick question: How does one actually go about building fw_printenv
nowadays? At lest just doing 'make env' fails for me:

[user at host u-boot.git]$ make env
  HOSTCC  tools/env/aes.o
  HOSTCC  tools/env/crc32.o
  HOSTCC  tools/env/ctype.o
  HOSTCC  tools/env/env_attr.o
  HOSTCC  tools/env/env_flags.o
  HOSTCC  tools/env/fw_env.o
In file included from tools/env/fw_env.c:117:0:
include/env_default.h:110:11: error: expected ‘}’ before
‘CONFIG_SYS_ARCH’
make[1]: *** [tools/env/fw_env.o] Error 1
make: *** [env] Error 2

I suspect some generated/autoconf.h discrepancy but am unsure how to
properly fix that. Any suggestions?