在Ubuntu中用arm-none-eabi-gcc编译STM32F7的BSP出错

发布于 2019-06-14 17:18:58 浏览：2442 订阅该版

[tocm]

我在 Ubuntu 16.04 中搭建了 RTT 的 STM32 开发环境，编译 stm32f411-st-nucleo BSP 工程是没问题的。环境搭建情况如下：

[list]
(*)[Linux+QEMU 搭建 RT-Thread 开发环境](https://blog.csdn.net/lu_embedded/article/details/90644583)
(*)[Linux 下 STM32 开发环境搭建](https://blog.csdn.net/lu_embedded/article/details/91402773)
[/list]

但是当我准备编译 stm32f767-st-nucleo BSP 工程时却出错了，出错信息如下：

```
......
CC /home/rudy/workspace_hd/Draft/RTTB/rt-thread-4.0.1/bsp/stm32/libraries/HAL_Drivers/drv_gpio.o
CC /home/rudy/workspace_hd/Draft/RTTB/rt-thread-4.0.1/bsp/stm32/libraries/HAL_Drivers/drv_usart.o
CC /home/rudy/workspace_hd/Draft/RTTB/rt-thread-4.0.1/bsp/stm32/libraries/HAL_Drivers/drv_common.o
LINK rt-thread.elf
/usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/bin/ld: error: build/board/board.o uses VFP register arguments, rt-thread.elf does not
/usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/bin/ld: failed to merge target specific data of file build/board/board.o

```我修改了 rtconfig.py 文件的部分配置：

```# 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'/usr/bin'

......

BUILD = 'debug'

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

DEVICE = ' -mcpu=' + CPU + ' -mthumb -mfpu=fpv5-d16 -mfloat-abi=hard -ffunction-sections -fdata-sections'
    #DEVICE = ' -mcpu=' + CPU + ' -mthumb -mfpu=fpv5-sp-d16 -mfloat-abi=hard -ffunction-sections -fdata-sections'
    #CFLAGS = DEVICE + ' -Wall -std=c99'
    CFLAGS = DEVICE + ' -Dgcc -std=c11'
    AFLAGS = ' -c' + DEVICE + ' -x assembler-with-cpp -Wa,-mimplicit-it=thumb '
    LFLAGS = DEVICE + ' -Wl,--gc-sections,-Map=rtthread.map,-cref,-u,Reset_Handler -T board/linker_scripts/link.lds'

......```其实也就是修改了 EXEC_PATH 和 CFLAGS 。

看起来是 VFP 的问题，我试过用 -mfpu=fpv5-d16 和 -mfpu=fpv5-sp-d16 都不行，换了其他 stm32f7 的 BSP 工程也一样。

不知道大家有没有和我一样用 Linux 做 STM32 开发的，麻烦指点一下，感谢！

![RTT-STM32F7编译出错.png](https://oss-club.rt-thread.org/uploads/201906/14/170709vxqoxr4u77tdcd9s.png)