# TODO: Set to make when make is used as a generator
set(CMAKE_MAKE_PROGRAM ninja)
get_filename_component(generator ${CMAKE_MAKE_PROGRAM} NAME)

set(arch_list
  arc
  arm
  nios2
  riscv32
  posix
  x86
  x86_64
  xtensa
  )

string(REPLACE " " ";" BOARD_ROOT "${BOARD_ROOT_SPACE_SEPARATED}")
string(REPLACE " " ";" SHIELD_LIST "${SHIELD_LIST_SPACE_SEPARATED}")

foreach(arch ${arch_list})
  foreach(root ${BOARD_ROOT})
    set(board_arch_dir ${root}/boards/${arch})

    # Match the _defconfig files in the board directories to make sure we are
    # finding boards, e.g. qemu_xtensa/qemu_xtensa_defconfig
    file(GLOB_RECURSE defconfigs_for_${arch}
      RELATIVE ${board_arch_dir}
      ${board_arch_dir}/*_defconfig
      )

    # The above gives a list like
    # nrf51_blenano/nrf51_blenano_defconfig;nrf51_pca10028/nrf51_pca10028_defconfig
    # we construct a list of board names by removing both the _defconfig
    # suffix and the path.
    set(boards_for_${arch} "")
    foreach(defconfig_path ${defconfigs_for_${arch}})
      get_filename_component(board ${defconfig_path} NAME)
      string(REPLACE "_defconfig" "" board "${board}")
      list(APPEND boards_for_${arch} ${board})
    endforeach()
  endforeach()
endforeach()

message("Cleaning targets:")
message("  clean     - Remove most generated files but keep configuration and backup files")
message("  pristine  - Remove all files in the build directory")
message("")
message("Configuration targets:")
message("")
message("  menuconfig - Update configuration using an interactive configuration interface")
message("")
message("Other generic targets:")
message("  all          - Build a zephyr application")
message("  run          - Build a zephyr application and run it if the board supports emulation")
message("  flash        - Build and flash an application")
message("  debug        - Build and debug an application using GDB")
message("  debugserver  - Build and start a GDB server (port 1234 for Qemu targets)")
message("  ram_report   - Build and create RAM usage report")
message("  rom_report   - Build and create ROM usage report")
message("  usage        - Display this text")
message("")
message("Supported Boards:")
message("")
message("  To generate project files for one of the supported boards below, run:")
message("")
message("  $ cmake -DBOARD=<BOARD NAME> [-DSHIELD=<SHIELD NAME>] -Bpath/to/build_dir -Hpath/to/source_dir")
message("")
message("  or")
message("")
message("  $ export BOARD=<BOARD NAME>")
message("  $ export SHIELD=<SHIELD NAME> #optional")
message("  $ cmake -Bpath/to/build_dir -Hpath/to/source_dir")
message("")
foreach(arch ${arch_list})
  message(" ${arch}:")
  foreach(board ${boards_for_${arch}})
    message("   ${board}")
  endforeach()
endforeach()
message("")
message("Supported Shields:")
message("")
foreach(shield ${SHIELD_LIST})
  message(" ${shield}")
endforeach()
message("")
message("Build flags:")
message("")
message("  ${generator} VERBOSE=1 [targets] verbose build")
message("  cmake -DW=n   Enable extra gcc checks, n=1,2,3 where")
message("   1: warnings which may be relevant and do not occur too often")
message("   2: warnings which occur quite often but may still be relevant")
message("   3: more obscure warnings, can most likely be ignored")
message("   Multiple levels can be combined with W=12 or W=123")