使用Scons 构建工具，ARMClang交叉编译工具，当使用scons命令编译时，无法编译汇编文件。

发布于 2024-08-08 15:49:20 浏览：581 订阅该版

1 个回答

IJRG_9610 2024-08-09

这家伙很懒，什么也没写！

## 【补充】
本项目github拉去下来的项目，在stm32F407 bsp执行scons指令编译文件
```
$ scons --verbose
scons: Reading SConscript files ...
scons: done reading SConscript files.
scons: Building targets ...
scons: building associated VariantDir targets: build
armclang --cpu Cortex-M4.fp --apcs=interwork -g -DSTM32F407xx -D__RTTHREAD__ -DRT_USING_ARMLIBC -DRT_USING_LIBC -D__STDC_LIMIT_MACROS -D__CLK_TCK=RT_TICK_PER_SECOND -DUSE_HAL_DRIVER  -ID:\xxx_work\PROJECT\xx\rt-thread\bsp\stm32\libraries\HAL_Drivers\CMSIS\Include -c -o build\kernel\libcpu\arm\cortex-m4\context_rvds.o D:\xxx_work\PROJECT\xx\rt-thread\libcpu\arm\cortex-m4\context_rvds.S
armclang: error: unknown argument: '--cpu'
armclang: error: unknown argument: '--apcs=interwork'
armclang: fatal error: no target architecture given; use --target=arm-arm-none-eabi or --target=aarch64-arm-none-eabi
scons: *** [build\kernel\libcpu\arm\cortex-m4\context_rvds.o] Error 1
scons: building terminated because of errors.
```

## 疑问：
编译汇编文件使用的工具不是armasm吗？scons 怎么使用armclang工具呢？

以下是SconStruct代码：
```python
DefaultEnvironment(tools=[])
env = Environment(tools = ['mingw'],
    AS = rtconfig.AS, ASFLAGS = rtconfig.AFLAGS,
    CC = rtconfig.CC, CFLAGS = rtconfig.CFLAGS,
    AR = rtconfig.AR, ARFLAGS = '-rc',
    CXX = rtconfig.CXX, CXXFLAGS = rtconfig.CXXFLAGS,
    LINK = rtconfig.LINK, LINKFLAGS = rtconfig.LFLAGS)
env.PrependENVPath('PATH', rtconfig.EXEC_PATH)
```
rtconfig.py文件设置内容如下：

```python
elif PLATFORM == 'armclang':
    # toolchains
    CC = 'armclang'
    CXX = 'armclang'
    AS = 'armasm'
    AR = 'armar'
    LINK = 'armlink'
    TARGET_EXT = 'axf'

DEVICE = ' --cpu Cortex-M4.fp '
    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m4 '
    CFLAGS += ' -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 '
    CFLAGS += ' -mfloat-abi=hard -c -fno-rtti -funsigned-char -fshort-enums -fshort-wchar '
    CFLAGS += ' -gdwarf-3 -ffunction-sections '
    AFLAGS = DEVICE + ' --apcs=interwork '
    LFLAGS = DEVICE + ' --info sizes --info totals --info unused --info veneers '
    LFLAGS += ' --list rt-thread.map '
    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'

EXEC_PATH += '/ARM/ARMCLANG/bin/'

if BUILD == 'debug':
        CFLAGS += ' -g -O1' # armclang recommend
        AFLAGS += ' -g'
    else:
        CFLAGS += ' -O2'
        
    CXXFLAGS = CFLAGS
    CFLAGS += ' -std=c99'

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

elif PLATFORM == 'iccarm':
```

最后解决的办法如下：
注释rtt根目录tool/building.py文件PrepareBuilding函数中的env['ASCOM']= env['ASPPCOM']就可以了