import os

ARCH = 'arm'
CPU = 'cortex-m0'
CROSS_TOOL = 'gcc'

#------- toolchains path -------------------------------------------------------
if os.getenv('RTT_CC'):
    CROSS_TOOL = os.getenv('RTT_CC')

if  CROSS_TOOL == 'gcc':
    PLATFORM    = 'gcc'
    EXEC_PATH   = '/usr/bin'

if os.getenv('RTT_EXEC_PATH'):
    EXEC_PATH = os.getenv('RTT_EXEC_PATH')

#BUILD = 'debug'
BUILD = 'release'

TARGET_NAME = 'rtthread.bin'

#------- GCC settings ----------------------------------------------------------
if PLATFORM == 'gcc':
    # toolchains
    PREFIX = 'arm-none-eabi-'
    CC = PREFIX + 'gcc'
    AS = PREFIX + 'gcc'
    AR = PREFIX + 'ar'
    LINK = PREFIX + 'gcc'
    TARGET_EXT = 'elf'
    SIZE = PREFIX + 'size'
    OBJDUMP = PREFIX + 'objdump'
    OBJCPY = PREFIX + 'objcopy'

    DEVICE = ' -mcpu=cortex-m0 -mthumb -mlong-calls -ffunction-sections -fdata-sections'
    CFLAGS = DEVICE + ' -g -Dgcc -D__RT_THREAD__'
    AFLAGS = ' -c' + DEVICE + ' -x assembler-with-cpp -Wa,-mimplicit-it=thumb -D__ASSEMBLY__'
    LFLAGS = DEVICE + ' -nostartfiles -Wl,--gc-sections,-Map=rtthread.map,-cref,-u,Reset_Handler '

    AFLAGS += ' -D__STARTUP_COPY_MULTIPLE -D__STARTUP_CLEAR_BSS_MULTIPLE'
    CFLAGS += ' -D__STARTUP_COPY_MULTIPLE -D__STARTUP_CLEAR_BSS_MULTIPLE'
    LINK_SCRIPT = 'gcc_link.ld.S'

    CPATH = ''
    LPATH = ''

    if BUILD == 'debug':
        CFLAGS += ' -O0 -gdwarf-2 -g'
        AFLAGS += ' -gdwarf-2'
    else:
        CFLAGS += ' -O2'

    POST_ACTION = OBJCPY + ' -O binary $TARGET ' + TARGET_NAME + '\n'
    POST_ACTION += SIZE + ' $TARGET\n'