Linux 交叉编译(toolchain) ARM aarch64版 libyaml.so 库

前言全局说明

Linux 交叉编译(toolchain) ARM aarch64版 libyaml.so 库

一、说明

环境:

ubuntu 18.04

二、下载源码:

https://github.com/yaml/libyaml

三、环境安装

3.1 ubuntu

sudo apt-get -y install autoconf libtool make

四、编译

4.1 编译环境生效

交叉编译工具链 gcc 和 g++ 路径

export toolchain_BIN=你的编译工具链路径/bin
 
## Set toolchain 
export PATH=$toolchain_BIN:$PATH
export target_host=aarch64-linux-gnu （修改成你的编译工具名，bin目录里的）
export CROSS_COMPILE=${target_host}
# export ARCH=arm
export ARCH=arm64
export AR=${CROSS_COMPILE}-ar
export AS=${CROSS_COMPILE}-as
export CC=${CROSS_COMPILE}-gcc
export CXX=${CROSS_COMPILE}-g++
export LD=${CROSS_COMPILE}-ld
export NM=${CROSS_COMPILE}-nm
export OBJDUMP=${CROSS_COMPILE}-objdump
export STRIP=${CROSS_COMPILE}-strip

4.2 编译

$ ./bootstrap
$ ./configure --host=aarch64-linux-gnu
$ make
$ make install (一般不安装so到本地系统了，直接拷贝 so 到 arm 机器里即可)

4.3 查看编译结果

ll src/.libs/

注意：.libs 是隐藏文件夹

五、遇到问题：

5.1 AC_PROG_LIBTOOL

qt@qt-vm:~/libyaml-master$ ./bootstrap 
autoreconf: Entering directory `.'
autoreconf: configure.ac: not using Gettext
autoreconf: running: aclocal --force 
autoreconf: configure.ac: tracing
autoreconf: configure.ac: creating directory config
autoreconf: configure.ac: not using Libtool
autoreconf: running: /usr/bin/autoconf --force
configure.ac:56: error: possibly undefined macro: AC_PROG_LIBTOOL
      If this token and others are legitimate, please use m4_pattern_allow.
      See the Autoconf documentation.
autoreconf: /usr/bin/autoconf failed with exit status: 1
 

解决方法：
https://www.cnblogs.com/y4247464/p/14388334.html

sudo cp /usr/share/aclocal/*.m4 /usr/local/share/aclocal/

5.2 提示--host

qt@qt-vm:~/libyaml-master$ ./configure 
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for a thread-safe mkdir -p... /bin/mkdir -p
checking for gawk... no
checking for mawk... mawk
checking whether make sets $(MAKE)... yes
checking whether make supports nested variables... yes
checking for gcc... aarch64-linux-gnu-gcc
checking whether the C compiler works... yes
checking for C compiler default output file name... a.out
checking for suffix of executables... 
checking whether we are cross compiling... configure: error: in `/home/qt/avatr-ADAS/libyaml_20200623/libyaml-master':
configure: error: cannot run C compiled programs.
If you meant to cross compile, use `--host'.
See `config.log' for more details

解决方法：

./configure --host=${CROSS_COMPILE}

${CROSS_COMPILE} 是开始设置环境变量时的值

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免责声明：本号所涉及内容仅供安全研究与教学使用，如出现其他风险，后果自负。

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参考、来源：
https://blog.csdn.net/Fyear100/article/details/93503723
https://blog.csdn.net/turbock/article/details/107718734
https://blog.51cto.com/fengyuzaitu/5645558
https://blog.51cto.com/feather/1695608