gcc -Wl,--rpath 设置不生效问题

问题

gcc编译参数 -Wl,--rpath 设置不生效问题

解决方案

通过检索，找到一下链接：https://stackoverflow.com/questions/47117443/dynamic-linking-with-rpath-not-working-under-ubuntu-17-10；他似乎遇到和我一样的问题。

原文答案如下：

What likely happened is that your updated linker emits DT_RUNPATH dynamic tag, where the old linker emitted DT_RPATH. (It’s also possible that your old linker was GNU-ld, and the new one is Gold.)

The DT_RUNPATH is preferred as more correct, and affects search path of the binary itself, but not of any of the dependent libraries.

The DT_RPATH has global effect, similar to adding the directory to LD_LIBRARY_PATH environment variable.

You can verify this with: readelf -d a.out | grep 'R.*PATH'.

If you do see the RPATH vs. RUNPATH difference, and in fact are using Gold, you can force the “old” behavior with -Wl,--disable-new-dtags (GNU ld also had --disable-new-dtags added to it recently, so it should work for either linker).

总结

通过添加-Wl,--disable-new-dtags选项可以解决。