给编译好的so修改rpath为当前路径

　　这几天调整安装，发现有些文件安装到/lib下。就想复制到安装目录，这样影响更少。然后发现rpath有问题。怎么办？修改为当前路径最好。

• 当前路径的两种表示方法

.或者$ORIGIN

NEW_RPATH=.:/usr/local/lib/:/lib/aarch64-linux-gnu/
NEW_RPATH=\$ORIGIN:/usr/local/lib/:/lib/aarch64-linux-gnu/

在编译的时候，大多使用$ORIGIN。因为$有特殊含义，所以这里进行了转义。

• 办法1

patchelf --set-rpath ${NEW_RPATH} libopencv_video.so

• 办法2

chrpath -r ${NEW_RPATH} libopencv_video.so

• 修改前

$ ldd libopencv_video.so
        linux-vdso.so.1 (0x0000007fa127c000)
        libopencv_imgproc.so.3.4 => /home/toybrick/work/libopencv_imgproc.so.3.4 (0x0000007fa0dd0000)
        libopencv_core.so.3.4 => /home/toybrick/work/libopencv_core.so.3.4 (0x0000007fa0aae000)
        libstdc++.so.6 => /lib/aarch64-linux-gnu/libstdc++.so.6 (0x0000007fa0923000)
        libm.so.6 => /lib/aarch64-linux-gnu/libm.so.6 (0x0000007fa0866000)
        libgcc_s.so.1 => /lib/aarch64-linux-gnu/libgcc_s.so.1 (0x0000007fa0842000)
        libc.so.6 => /lib/aarch64-linux-gnu/libc.so.6 (0x0000007fa06d0000)
        libdl.so.2 => /lib/aarch64-linux-gnu/libdl.so.2 (0x0000007fa06bc000)
        libpthread.so.0 => /lib/aarch64-linux-gnu/libpthread.so.0 (0x0000007fa068d000)
        libz.so.1 => /lib/aarch64-linux-gnu/libz.so.1 (0x0000007fa0660000)
        /lib/ld-linux-aarch64.so.1 (0x0000007fa124e000)

• 修改后

$ ldd libopencv_video.so
        linux-vdso.so.1 (0x0000007f9bb30000)
        libopencv_imgproc.so.3.4 => /home/toybrick/package/./libopencv_imgproc.so.3.4 (0x0000007f9b6a7000)
        libopencv_core.so.3.4 => /home/toybrick/package/pan/./libopencv_core.so.3.4 (0x0000007f9b385000)
        libstdc++.so.6 => /lib/aarch64-linux-gnu/libstdc++.so.6 (0x0000007f9b1d7000)
        libm.so.6 => /lib/aarch64-linux-gnu/libm.so.6 (0x0000007f9b11a000)
        libgcc_s.so.1 => /lib/aarch64-linux-gnu/libgcc_s.so.1 (0x0000007f9b0f6000)
        libc.so.6 => /lib/aarch64-linux-gnu/libc.so.6 (0x0000007f9af84000)
        libdl.so.2 => /lib/aarch64-linux-gnu/libdl.so.2 (0x0000007f9af70000)
        libpthread.so.0 => /lib/aarch64-linux-gnu/libpthread.so.0 (0x0000007f9af41000)
        libz.so.1 => /lib/aarch64-linux-gnu/libz.so.1 (0x0000007f9af14000)
        /lib/ld-linux-aarch64.so.1 (0x0000007f9bb02000)

可以看到由编译的绝对路径，变成了相对路径。