如果要dlopen的库不在标准搜索路径中，则有很多选择:

If the library you want to dlopen is not in the standard search path you have a number of options:

1. 在dlopen中指定文件的完整路径

1. Specify the full path to the file in dlopen

dlopen("/full/path/to/libfile.so");

通过LD_LIBRARY_PATH将路径添加到库

Add the path to the library via LD_LIBRARY_PATH

LD_LIBRARY_PATH=/path/to/library/ ./executable

使用ld -rpath选项向应用程序添加库路径.

use the ld -rpath option to add a library path to the application.

g++ -link stuff- -Wl,-rpath=/path/to/library/

请注意，选项1& 3将库路径硬编码到您的应用程序中. -rpath确实具有指定相对路径的选项，即

Note that options 1 & 3 hardcode the library path into your application. -rpath does have an option to specify a relative path, i.e.

-Wl,-rpath=$ORIGIN/../lib/

将相对路径嵌入到应用程序中.

Will embed a relative path into the application.