ARM NEON 程序debug: error识别arm neon intrinsics 命令, LD_LIBRARY_PATH shouldn‘t

报错1：error: inlining failed in call to always_inline ‘vdupq_n_s32’: target specific option mismatch

/usr/lib/gcc/arm-linux-gnueabihf/6/include/arm_neon.h:5792:1: error: inlining failed in call to always_inline ‘vdupq_n_s32’: target specific option mismatch
 vdupq_n_s32 (int32_t __a)
 ^~~~~~~~~~~
neon_test.c:94:13: note: called from here
   int32x4_t sum_t = vdupq_n_s32(0);
             ^~~~~

如果已安装好arm-linux-gnueabihf-gcc交叉编译器，

运行编译时加入选项：-march=armv8-a -marm -mfpu=neon

arm-linux-gnueabihf-gcc -march=armv8-a -marm -mfpu=neon  neon_test.c -o neon_test.out

or

arm-linux-gnueabihf-gcc -march=armv8-a -marm -mfpu=neon  ./test_neon.cpp

报错2： 编译glibc 执行configure 遇到报错：LD_LIBRARY_PATH shouldn't contain the current directory when building glibc

.....

checking LD_LIBRARY_PATH variable... contains current directory

configure: error:

*** LD_LIBRARY_PATH shouldn't contain the current directory when

*** building glibc. Please change the environment variable

*** and run configure again.

检查  LD_LIBRARY_PATH：

查看/etc/profile里设置：

export LD_LIBRARY_PATH=/usr/local/gcc-7.3.0/lib64:/notebook/3rdlib/lib:/usr/lib64: $LD_LIBRARY_PATH

echo看下：

[root@taishan build]# echo $LD_LIBRARY_PATH

/usr/local/gcc-7.3.0/lib64:/notebook/3rdlib/lib:/usr/lib64:     最后这里多了个冒号分隔符,(因为系统默认LD_LIBRARY_PATH可能是空的，分隔符后面没东西）

（去掉多余冒号即可）修改成：

vim ~/.bashrc

export LD_LIBRARY_PATH=/usr/local/gcc-7.3.0/lib64

export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/notebook/3rdlib/lib:/usr/lib64

修改保存后查看：

echo $LD_LIBRARY_PATH

/usr/local/gcc-7.3.0/lib64:/notebook/3rdlib/lib:/usr/lib64

成功解决error.

Note：

1. 运行命令汇总：

arm-linux-gnueabihf-g++ -O3 -march=armv7-a -mcpu=cortex-a9 -ftree-vectorize -mfpu=neon -mfpu=vfpv3-fp16 -mfloat-abi=hard -ffast-math 

2.安装arm-linux-gnueabihf-gcc可参考如下链接：

     arm-linux-gnueabihf gcc8.3交叉编译工具搭建教程

     Building GCC as a cross compiler for Raspberry Pi | Solarian Programmer