import os
import sys

from building import *

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

if os.getenv('RTT_ROOT'):
    RTT_ROOT = os.getenv('RTT_ROOT')
else:
    RTT_ROOT = r'../../..'

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

PLATFORM    = 'gcc'
EXEC_PATH   = RTT_ROOT + '/../prebuilts/gcc/linux-x86/arm/gcc-arm-none-eabi-10-2020-q4-major-x86_64-linux/bin/'

BUILD = 'release'

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

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

    DEVICE = ' -mcpu=cortex-m4 -mthumb -mfpu=fpv4-sp-d16 -mfloat-abi=hard -ffunction-sections -fdata-sections --specs=nano.specs'
    CFLAGS = DEVICE + ' -std=gnu99 -Wall -g -Wno-stringop-truncation -Wall -Werror=maybe-uninitialized -Werror=implicit-function-declaration -Werror=return-type -Werror=address -Werror=int-to-pointer-cast -Werror=pointer-to-int-cast'
    AFLAGS = DEVICE + ' -c -x assembler-with-cpp -Wa,-mimplicit-it=thumb -D__ASSEMBLY__'
    LINK_SCRIPT = 'gcc_xip_off.ld.S'
    LFLAGS  = DEVICE + ' -lm -lgcc -lc' + ' -nostartfiles -Wl,--gc-sections,-Map=rtthread.map,-cref,-u,Reset_Handler -T gcc_xip_off.ld'
    CPATH   = ''
    LPATH   = ''

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

    CXXFLAGS = CFLAGS

DUMP_ACTION = OBJDUMP + ' -D -S $TARGET > rtt.asm\n'
POST_ACTION = OBJCPY + ' -O binary $TARGET rtthread.bin\n' + SIZE + ' $TARGET \n'