ubuntu交叉编译expat库给arm平台使用

1.下载expat库源码：

https://github.com/libexpat/libexpat/release?page=2

wget https://github.com/libexpat/libexpat/release/download/R_2_3_0/expat-2.3.0.tar.bz2

下载成功：

2.解压expat库，并进入解压后的目录：

tar xjf expat-2.3.0.tar.bz2
cd expat-2.3.0

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