保留 pcl 1.7 安裝 pcl 1.8

git clone https://github.com/PointCloudLibrary/pcl.git cd pcl mkdir build cd build 下載好以後安裝，注意這一步：git cmake -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=/home/ly/lib/pcl-1.8 -DBUILD_GPU=ON -DBUILD

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