交叉编译opencv报错：/usr/local/lib/libz.so: file not recognized: File format not recognized

 

 /usr/local/lib/libz.so: file not recognized: File format not recognized报错的原因大概就是/usr/local/lib/libz.so是x86的64位架构的，不能用在板子上，所以需要从新编译zlib。

这里只要在cmake-gui配置是勾选上BUILD_ZLIB就可以了：