text: import os
  
  BUILD = 'debug'
  
  # toolchains options
  ARCH='arm'
  CPU='cortex-m4'
  CROSS_TOOL='gcc'
  
  # bsp lib config
  BSP_LIBRARY_TYPE = None
  
  if os.getenv('RTT_CC'):
      CROSS_TOOL = os.getenv('RTT_CC')
  if os.getenv('RTT_ROOT'):
      RTT_ROOT = os.getenv('RTT_ROOT')
  
  # cross_tool provides the cross compiler
  # EXEC_PATH is the compiler execute path, for example, CodeSourcery, Keil MDK, IAR
  if CROSS_TOOL == 'gcc':
      PLATFORM = 'gcc'
      EXEC_PATH = r'/home/onelife/.platformio/packages/toolchain-gccarmnoneeabi/bin/'
  else:
      print('Unsupported compiler %s' % CROSS_TOOL)
      exit(-1)
  
  
  if os.getenv('RTT_EXEC_PATH'):
      EXEC_PATH = os.getenv('RTT_EXEC_PATH')
  
  
  if PLATFORM == 'gcc':
      # toolchains
      PREFIX = 'arm-none-eabi-'
      CC = PREFIX + 'gcc'
      AS = PREFIX + 'gcc'
      AR = PREFIX + 'ar'
      CXX = PREFIX + 'g++'
      LINK = PREFIX + 'gcc'
      TARGET_EXT = 'elf'
      SIZE = PREFIX + 'size'
      OBJDUMP = PREFIX + 'objdump'
      OBJCPY = PREFIX + 'objcopy'
  
      DEVICE = ' -mcpu=cortex-m4 -mthumb -mfpu=fpv4-sp-d16 -mfloat-abi=hard -ffunction-sections -fdata-sections'
      CFLAGS = DEVICE + ' -Dgcc'
      AFLAGS = ' -c' + DEVICE + ' -x assembler-with-cpp -Wa,-mimplicit-it=thumb '
      LFLAGS = DEVICE + ' -Wl,--gc-sections,-Map=realtouch.map,-cref,-u,Reset_Handler -T board/linker_scripts/link.lds'
  
      CPATH = ''
      LPATH = ''
  
      if BUILD == 'debug':
          CFLAGS += ' -O0 -gdwarf-2 -g'
          AFLAGS += ' -gdwarf-2'
      else:
          CFLAGS += ' -O2'
  
      CXXFLAGS = CFLAGS 
  
      POST_ACTION = OBJCPY + ' -O binary $TARGET realtouch.bin\n' + SIZE + ' $TARGET \n'
  else:
      print('Unsupported toolchain %s' % PLATFORM)
      exit(-1)
  
  def dist_handle(BSP_ROOT):
      import sys
      cwd_path = os.getcwd()
      sys.path.append(os.path.join(os.path.dirname(BSP_ROOT), 'tools'))
      from sdk_dist import dist_do_building
      dist_do_building(BSP_ROOT)
  