import os
import sys

# toolchains options
ARCH='arm'
CPU='cortex-m3'
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   = r'E:/tool/env/tools/gnu_gcc/arm_gcc/mingw/bin'
elif CROSS_TOOL == 'keil':
    PLATFORM    = 'armcc'
    EXEC_PATH   = r'C:/Keil'
elif CROSS_TOOL == 'iar':
    PLATFORM    = 'iccarm'
    EXEC_PATH   = r'C:/Program Files/IAR Systems/Embedded Workbench 6.0 Evaluation'

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

BUILD = 'debug'

if os.path.exists(os.path.abspath('./') + '/drivers'):
    gcc_linkscripts_path   = 'drivers/linker_scripts/link.lds'
    armcc_linkscripts_path = 'drivers/linker_scripts/link.sct'
    iar_linkscripts_path   = 'drivers/linker_scripts/link.icf'
else:
    gcc_linkscripts_path   = '../../drivers/linker_scripts/link.lds'
    armcc_linkscripts_path = '../../drivers/linker_scripts/link.sct'
    iar_linkscripts_path   = '../../drivers/linker_scripts/link.icf'

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-m3 -mthumb -ffunction-sections -fdata-sections'
    CFLAGS = DEVICE + ' -std=gnu99 -w -fno-common -fomit-frame-pointer -fno-short-enums -fsigned-char'
    AFLAGS = ' -c' + DEVICE + ' -x assembler-with-cpp -Wa,-mimplicit-it=thumb '
    LFLAGS = DEVICE + ' -lm -lgcc -lc' + ' -g --specs=nano.specs -nostartfiles -Wl,-Map=rtthread-w60x.map -Os -Wl,--gc-sections -Wl,--cref -Wl,--entry=Reset_Handler -Wl,--no-enum-size-warning -Wl,--no-wchar-size-warning -T ' + gcc_linkscripts_path

    CPATH = ''
    LPATH = ''

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

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

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

    DEVICE = ' --cpu=Cortex-M3'
    CFLAGS = DEVICE + ' --apcs=interwork --c99 --gnu'
    AFLAGS = DEVICE + ' --apcs=interwork '
    LFLAGS = DEVICE + ' --scatter ' + armcc_linkscripts_path + ' --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 += ' -O2'

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

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

    DEVICE = '-Dewarm'

    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 += ' --endian=little'
    CFLAGS += ' --cpu=Cortex-M3'
    CFLAGS += ' -e'
    CFLAGS += ' --fpu=None'
    CFLAGS += ' --dlib_config "' + EXEC_PATH + '/arm/INC/c/DLib_Config_Normal.h"'
    CFLAGS += ' --silent'

    AFLAGS = DEVICE
    AFLAGS += ' -s+'
    AFLAGS += ' -w+'
    AFLAGS += ' -r'
    AFLAGS += ' --cpu Cortex-M3'
    AFLAGS += ' --fpu None'
    AFLAGS += ' -S'

    if BUILD == 'debug':
        CFLAGS += ' --debug'
        CFLAGS += ' -On'
    else:
        CFLAGS += ' -Oh'

    LFLAGS = ' --config ' + iar_linkscripts_path
    LFLAGS += ' --entry __iar_program_start'

    EXEC_PATH = EXEC_PATH + '/arm/bin/'
    POST_ACTION = 'ielftool --bin $TARGET rtthread.bin \n'
    POST_ACTION += 'python ./makeimg.py'