old_contents: import os
  
  # CPU options
  ARCH='mips'
  CPU ='loongson_1c'
  
  # toolchains options
  CROSS_TOOL  = 'gcc'
  
  if os.getenv('RTT_CC'):
  	CROSS_TOOL = os.getenv('RTT_CC')
  
  if  CROSS_TOOL == 'gcc':
  	PLATFORM    = 'gcc'
  	EXEC_PATH   = '/opt/opt/gcc-4.3-ls232/bin'
  else:
      print '================ERROR============================'
      print 'Not support %s yet!' % CROSS_TOOL
      print '================================================='
      exit(0)
  
  if os.getenv('RTT_EXEC_PATH'):
  	EXEC_PATH = os.getenv('RTT_EXEC_PATH')
  
  BUILD       = 'debug'
  
  PREFIX = 'mipsel-linux-'
  CC = PREFIX + 'gcc'
  AS = PREFIX + 'gcc'
  AR = PREFIX + 'ar'
  LINK = PREFIX + 'gcc'
  TARGET_EXT = 'elf'
  SIZE = PREFIX + 'size'
  OBJDUMP = PREFIX + 'objdump'
  OBJCPY = PREFIX + 'objcopy'
  READELF = PREFIX + 'readelf'
  
  DEVICE = ' -mips32'
  CFLAGS = DEVICE + ' -EL -G0 -mno-abicalls -fno-pic -fno-builtin -fno-exceptions -ffunction-sections -fomit-frame-pointer'
  AFLAGS = ' -c' + DEVICE + ' -EL -fno-pic -fno-builtin -mno-abicalls -x assembler-with-cpp -DSYSTEM_STACK=0x80003fe8'
  LFLAGS = DEVICE + ' -nostartfiles -EL -Wl,--gc-sections,-Map=rtthread.map,-cref,-u,Reset_Handler -T ls1b_ram.lds'
  
  CPATH = ''
  LPATH = ''
  
  if BUILD == 'debug':
      CFLAGS += ' -O0 -gdwarf-2'
      AFLAGS += ' -gdwarf-2'
  else:
      CFLAGS += ' -O2'
  
  DUMP_ACTION = OBJDUMP + ' -D -S $TARGET > rtt.asm\n'
  READELF_ACTION = READELF + ' -a $TARGET > rtt.map\n'
  POST_ACTION = OBJCPY + ' -O binary $TARGET rtthread.bin\n' + SIZE + ' $TARGET \n'
  
new_contents: import os
  
  # CPU options
  ARCH='mips'
  CPU ='loongson_1c'
  
  # toolchains options
  CROSS_TOOL  = 'gcc'
  
  if os.getenv('RTT_CC'):
  	CROSS_TOOL = os.getenv('RTT_CC')
  
  if  CROSS_TOOL == 'gcc':
  	PLATFORM    = 'gcc'
  	EXEC_PATH   = '/opt/opt/gcc-4.3-ls232/bin'
  else:
      print '================ERROR==========================='
      print 'Not support %s yet!' % CROSS_TOOL
      print '================================================='
      exit(0)
  
  if os.getenv('RTT_EXEC_PATH'):
  	EXEC_PATH = os.getenv('RTT_EXEC_PATH')
  
  BUILD       = 'debug'
  
  PREFIX = 'mips-sde-elf-'
  CC = PREFIX + 'gcc'
  AS = PREFIX + 'gcc'
  AR = PREFIX + 'ar'
  LINK = PREFIX + 'gcc'
  TARGET_EXT = 'elf'
  SIZE = PREFIX + 'size'
  OBJDUMP = PREFIX + 'objdump'
  OBJCPY = PREFIX + 'objcopy'
  READELF = PREFIX + 'readelf'
  
  DEVICE = ' -mips32'
  CFLAGS = DEVICE + ' -EL -G0 -mno-abicalls -fno-pic -fno-builtin -fno-exceptions -ffunction-sections -fomit-frame-pointer'
  AFLAGS = ' -c' + DEVICE + ' -EL -fno-pic -fno-builtin -mno-abicalls -x assembler-with-cpp -DSYSTEM_STACK=0x80003fe8'
  LFLAGS = DEVICE + ' -nostartfiles -EL -Wl,--gc-sections,-Map=rtthread.map,-cref,-u,Reset_Handler -T ls1b_ram.lds'
  
  CPATH = ''
  LPATH = ''
  
  if BUILD == 'debug':
      CFLAGS += ' -O0 -gdwarf-2'
      AFLAGS += ' -gdwarf-2'
  else:
      CFLAGS += ' -O2'
  
  DUMP_ACTION = OBJDUMP + ' -D -S $TARGET > rtt.asm\n'
  READELF_ACTION = READELF + ' -a $TARGET > rtt.map\n'
  POST_ACTION = OBJCPY + ' -O binary $TARGET rtthread.bin\n' + SIZE + ' $TARGET \n'
  
subject: use mips-sde-elf for ls1c bsp.