当我在64位Ubuntu16.04和32位Cortex A9平台上交叉编译helloworld程序时,我遇到了以下错误。
$ make
/usr/local/comp/poky/1.7/sysroots/x86_64-pokysdk-linux/usr/bin/arm-poky-linux-gnueabi/arm-poky-linux-gnueabi-gcc -march=armv7-a -mthumb-interwork -mtune=cortex-a9 --sysroot=/usr/local/comp/poky/1.7/sysroots/cortexa9hf-vfp-neon-poky-linux-gnueabi -Iinclude -Wall -O3 -c -o main.o main.c
In file included from /usr/local/comp/poky/1.7/sysroots/cortexa9hf-vfp-neon-poky-linux-gnueabi/usr/include/features.h:389:0,
from /usr/local/comp/poky/1.7/sysroots/cortexa9hf-vfp-neon-poky-linux-gnueabi/usr/include/stdio.h:27,
from main.c:5:
/usr/local/comp/poky/1.7/sysroots/cortexa9hf-vfp-neon-poky-linux-gnueabi/usr/include/gnu/stubs.h:7:29: fatal error: gnu/stubs-soft.h: No such file or directory
# include <gnu/stubs-soft.h>
^
compilation terminated.
makefile:45: recipe for target 'main.o' failed
make: *** [main.o] Error 1然后检查stubs.h文件的内容:
$ cat /usr/local/comp/poky/1.7/sysroots/cortexa9hf-vfp-neon-poky-linux-gnueabi/usr/include/gnu/stubs.h
/* This file is automatically generated.
This file selects the right generated file of `__stub_FUNCTION' macros
based on the architecture being compiled for. */
#if !defined __ARM_PCS_VFP
# include <gnu/stubs-soft.h>
#endif
#if defined __ARM_PCS_VFP
# include <gnu/stubs-hard.h>
#endif我应该在makefile中定义_ARM_PCS_VFP吗?
发布于 2018-03-07 04:21:59
从交叉编译器的名称"cortexa9hf- VFP - neon -poky-linux-gnueabi“可以看出,它针对的是带有VFP体系结构和启用了neon的Cortex-A9。添加-mfloat-abi=hard交换机应该可以解决此问题。
来自GCC手册的
:
-mfloat-abi=名称:
指定要使用的浮点ABI。允许值为:‘soft’、‘softfp’和‘hard’。
指定‘soft’会导致GCC生成包含浮点运算的库调用的输出。“‘softfp”允许使用硬件浮点指令生成代码,但仍使用软浮点调用约定。‘’hard‘允许生成浮点指令,并使用特定于FPU的调用约定。
默认值取决于特定的目标配置。请注意,硬浮点ABI和软浮点ABI不是链接兼容的;您必须使用相同的ABI编译整个程序,并使用一组兼容的库进行链接。
https://stackoverflow.com/questions/49139125
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