问题
is there a way to find out programmatically which paths are searched by dlopen() for shared objects? I always thought dlopen() would only look in /lib and /usr/lib but now I've seen that on Linux Mint several core components like libglib-2.0.so are in a wholly different folders, namely in /rofs/lib/i386-gnu-linux and some others. Is there a way to get to know all these paths that dlopen() will search through for a shared object? I already checked the environment variable LD_LIBRARY_PATH but it's not defined at all.
回答1:
look at the ldconfig man page, and the file: /etc/ld.so.conf
回答2:
In addition of the ld.so.conf hint:
If you want to ensure that a specific library is dlopen-ed, pass a path to dlopen, e.g. dlopen("/some/path/to/lib.so", RTLD_LOCAL) or maybe dlopen("./lib.so", RTLD_LOCAL) but not dlopen("lib.so", RTLD_LOCAL)
来源：https://stackoverflow.com/questions/8193640/dlopen-search-path