import os

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

if os.getenv('RTT_CC'):
	CROSS_TOOL = os.getenv('RTT_CC')

# 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'C:\Program Files (x86)\GNU Tools ARM Embedded\6 2017-q1-update\bin'
elif CROSS_TOOL == 'keil':
	PLATFORM = 'armcc'
	EXEC_PATH = r'C:\Keil_v5'
elif CROSS_TOOL == 'iar':
	PLATFORM = 'iar'
	EXEC_PATH = r'C:\Program Files (x86)\IAR Systems\Embedded Workbench 8.2'

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

BUILD = ''
# BUILD = 'debug'


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

    DEVICE = ' -mcpu=cortex-m4 -mthumb -ffunction-sections -fdata-sections -Wuninitialized'

    if BUILD == 'debug':
        DEVICE = DEVICE + ' -DDEBUG'

    CFLAGS = DEVICE
    AFLAGS = ' -c' + DEVICE + ' -x assembler-with-cpp'
    LFLAGS = DEVICE + ' -nostartfiles -Wl,--gc-sections,-Map=rtthread.map -T ./linking_scripts/m480_link.ld '

    CPATH = ''
    LPATH = ''

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

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

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

    DEVICE = ' --cpu=cortex-m4.fp'
    CFLAGS = DEVICE + ' --apcs=interwork'
    AFLAGS = DEVICE
    LFLAGS = DEVICE + ' --info sizes --info totals --info unused --info veneers --list rtthread.map --scatter ./linking_scripts/m480_flash.sct'

    CFLAGS += ' --c99'
    CFLAGS += ' -I' + EXEC_PATH + '/ARM/RV31/INC'
    LFLAGS += ' --libpath ' + EXEC_PATH + '/ARM/RV31/LIB'

    EXEC_PATH += '/arm/bin40/'

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

    POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'

elif PLATFORM == 'iar':
    # toolchains
    CC = 'iccarm'
    AS = 'iasmarm'
    AR = 'iarchive'
    LINK = 'ilinkarm'
    TARGET_EXT = 'out'

    DEVICE = ' '

    CFLAGS = DEVICE
    CFLAGS += ' --diag_suppress Pa050'
    CFLAGS += ' --no_cse' 
    CFLAGS += ' --no_unroll' 
    CFLAGS += ' --no_inline' 
    CFLAGS += ' --no_code_motion' 
    CFLAGS += ' --no_tbaa' 
    CFLAGS += ' --no_clustering' 
    CFLAGS += ' --no_scheduling' 
    CFLAGS += ' --debug' 
    CFLAGS += ' --endian=little' 
    CFLAGS += ' --cpu=Cortex-M4' 
    CFLAGS += ' -e' 
    CFLAGS += ' --fpu=None'
    CFLAGS += ' --dlib_config "' + EXEC_PATH + '/arm/INC/c/DLib_Config_Normal.h"'    
    CFLAGS += ' -Ol'    
    CFLAGS += ' --use_c++_inline'
        
    AFLAGS = ''
    AFLAGS += ' -s+' 
    AFLAGS += ' -w+' 
    AFLAGS += ' -r' 
    AFLAGS += ' --cpu Cortex-M4' 
    AFLAGS += ' --fpu None' 

    LFLAGS = ' --config ./linking_scripts/m480_flash.icf'
    LFLAGS += ' --redirect _Printf=_PrintfTiny' 
    LFLAGS += ' --redirect _Scanf=_ScanfSmall' 
    LFLAGS += ' --entry __iar_program_start'    

    EXEC_PATH = EXEC_PATH + '/arm/bin/'
    POST_ACTION = ''
