RT-Thread中scons使用详细说明

发布于 2010-11-19 17:15:13 浏览：24634 订阅该版

20 个回答

bernard 2010-11-19

这家伙很懒，什么也没写！

bernard 2010-11-19

这家伙很懒，什么也没写！

新添加一个bsp需要准备的scons脚本：
1. 这个分支目录下的SConstruct文件；
2. 这个分支目录下的SConscript文件；
3. 这个分支目录下的编译配置文件：rtconfig.py
4. 整个分支的 RT-Thread配置文件：rtconfig.h

SConstruct文件是scons所接受的编译脚本主文件，它包含了一些基本的变量信息，以下的是一个脚本范例：

```

import os
import sys
import rtconfig

RTT_ROOT = os.path.normpath(os.getcwd() + '/../..')
sys.path = sys.path + [os.path.join(RTT_ROOT, 'tools')]
from building import *

TARGET = 'rtthread-stm32.' + rtconfig.TARGET_EXT

env = Environment(tools = ['mingw'],
	AS = rtconfig.AS, ASFLAGS = rtconfig.AFLAGS,
	CC = rtconfig.CC, CCFLAGS = rtconfig.CFLAGS,
	AR = rtconfig.AR, ARFLAGS = '-rc',
	LINK = rtconfig.LINK, LINKFLAGS = rtconfig.LFLAGS)
env.PrependENVPath('PATH', rtconfig.EXEC_PATH)

Export('RTT_ROOT')
Export('rtconfig')

# prepare building environment
objs = PrepareBuilding(env, RTT_ROOT)

# STM32 firemare library building script
objs = objs + SConscript(RTT_ROOT + '/bsp/stm3210/Libraries/SConscript', variant_dir='bsp/Libraries', duplicate=0)

# build program 
env.Program(TARGET, objs)

# end building 
EndBuilding(TARGET)

```

这个小节

```

# STM32 firemare library building script
objs = objs + SConscript(RTT_ROOT + '/bsp/stm3210/Libraries/SConscript', variant_dir='bsp/Libraries', duplicate=0)

```

能够让一个SConstruct文件再关联一个新的组件（用户自行定义的组件，而不是RT-Thread系统的组件）。

SConscript文件和下节的组件编译文件实际是一样的，因为可以把BSP看成一个组件Group（在工程文件中它也确实是一个Group），所以这个组件所对应的编译脚本就是SConscript，以下的是一个脚本范例：

```

Import('RTT_ROOT')
from building import *

src	= Glob('*.c')
CPPPATH = [RTT_ROOT + '/components/pthreads']
group = DefineGroup('pthreads', src, depend = ['RT_USING_PTHREADS'], CPPPATH = CPPPATH)

Return('group')

```

注意：如果是在components目录下放置一个新目录，并附加上类似上面的正确SConscript文件，那么在RT-Thread编译的过程中，scons将会自动寻找这个组件，并检查它的依赖关系，如果依赖关系满足，将自行把这个组件添加到编译过程中。

rtconfig.py编译配置文件主要指定编译器，编译器路径以及编译时的参数：

```

# toolchains options
ARCH='arm'
CPU='stm32'
CROSS_TOOL='keil'

if  CROSS_TOOL == 'gcc':
	PLATFORM 	= 'gcc'
	EXEC_PATH 	= 'D:/SourceryGCC/bin'
elif CROSS_TOOL == 'keil':
	PLATFORM 	= 'armcc'
	EXEC_PATH 	= 'E:/Keil'

BUILD = 'debug'
STM32_TYPE = 'STM32F10X_HD'

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

DEVICE = ' -mcpu=cortex-m3 -mthumb'
    CFLAGS = DEVICE + ' -DRT_USING_MINILIBC'
    AFLAGS = ' -c' + DEVICE + ' -x assembler-with-cpp'
    LFLAGS = DEVICE + ' -Wl,--gc-sections,-Map=rtthread-stm32.map,-cref,-u,Reset_Handler -T stm32_rom.ld'

CPATH = ''
    LPATH = ''

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

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

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

DEVICE = ' --device DARMSTM'
    CFLAGS = DEVICE + ' --apcs=interwork'
    AFLAGS = DEVICE
    LFLAGS = DEVICE + ' --info sizes --info totals --info unused --info veneers --list rtthread-stm32.map --scatter stm32_rom.sct'

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 
fromelf -z $TARGET'

```