  toybox          - Build unified toybox with commands selected in .config
  defconfig       - Write .config with default answers (max sane config)
  allyesconfig    - New config where all options are accepted with yes
                    This may not actually compile, it's a starting point
                    for further configuration (probably with menuconfig)
  allnoconfig     - New config where all options are answered with no
  randconfig      - New config with random answer to all options
  silentoldconfig - Same as oldconfig, but quietly
  macos_defconfig - Select commands known to build on macosx
  bsd_defconfig   - Select commands known to build on freebsd
  android_defconfig - Select commands available on android

  COMMANDNAME     - Build individual toybox command as a standalone binary.
  list            - List COMMANDNAMEs you can build standalone.
  list_example    - List example commands (often used by the test suite)
  list_pending    - List unfinished COMMANDNAMEs out of toys/pending.
  change          - Build each command standalone under change/.

  test_COMMAND    - Run tests for COMMAND (test_ps, test_cat, etc.)
  tests           - Run test suite against all compiled commands.
                    export TEST_HOST=1 to test host command, VERBOSE=all
                    to show all failures.
  baseline        - Create toybox_old for use by bloatcheck.
  bloatcheck      - Report size differences between old and current versions

  clean           - Delete temporary files.
  distclean       - Delete everything that isn't shipped.

  install_airlock - Install toybox and host toolchain (plus $TOOLCHAIN if any)
                    into $PREFIX directory, providing $PATH for hermetic builds.
  install_flat    - Install toybox into $PREFIX directory.
  install         - Install toybox into subdirectories of $PREFIX.
  uninstall_flat  - Remove toybox from $PREFIX directory.
  uninstall       - Remove toybox from subdirectories of $PREFIX.

  root            - Build/package root filesystem under root/ by calling
                    mkroot/mkroot.sh which is controlled by
                    CROSS= cross compile target (see scripts/mcm-buildall.sh)
                    LINUX= build kernel from this source as configured for qemu
  run_root        - boot toyroot under qemu by calling root/$CROSS/run-qemu.sh

example: make defconfig toybox install LDFLAGS="--static" CROSS_COMPILE=armv5l-
or     : make root run_root CROSS=sh4 LINUX=~/linux

