import os
import sys

# toolchains options
ARCH='arm'
CPU='cortex-m4'
CROSS_TOOL='gcc'

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   = 'C:\Users\XXYYZZ'
elif CROSS_TOOL == 'keil':
    PLATFORM    = 'armclang'
    EXEC_PATH   = 'C:/Keil_v5'
elif CROSS_TOOL == 'iar':
    PLATFORM    = 'iar'
    EXEC_PATH   = 'C:/Program Files/IAR Systems/Embedded Workbench 8.0'

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

# BUILD = 'debug' 
BUILD = 'release' 

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'
    NM = PREFIX + 'nm'

    DEVICE = ' -mcpu=cortex-m33 -mthumb -mfpu=fpv5-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=rtthread.map,-cref,-u,Reset_Handler -T script/fsp.ld -L script/'

    CPATH = ''
    LPATH = ''

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

    POST_ACTION = OBJCPY + ' -O binary $TARGET rtthread.bin\n' + SIZE + ' $TARGET \n'
    POST_ACTION += OBJCPY + ' -O ihex $TARGET rtthread.hex\n' + SIZE + ' $TARGET \n'

elif PLATFORM == 'armcc':
    # toolchains
    CC = 'armcc'
    AS = 'armasm'
    AR = 'armar'
    LINK = 'armlink'
    TARGET_EXT = 'axf'

    DEVICE = ' --cpu=cortex-m4'
    CFLAGS = DEVICE + ' --apcs=interwork --c99 --gnu'
    AFLAGS = DEVICE + ' --apcs=interwork '
    LFLAGS = DEVICE + ' --scatter ' + 'script/fsp.scat' + ' --info sizes --info totals --info unused --info veneers --list rt-thread.map --strict'
    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCC/lib'

    EXEC_PATH += '/ARM/ARMCC/bin/'

    if BUILD == 'debug':
        CFLAGS += ' -g -O0'
        AFLAGS += ' -g'
    else:
        CFLAGS += ' -Os'

    POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET \n'
    POST_ACTION += 'python ./makeimg.py'