问题
I'm trying to compile an example program that links to the shared library produced by Sundown. I'm compiling the program like so.
$ gcc -o sd sundown.c -L. -lsundown
Yet, when I run it I get the following error.
./sd: error while loading shared libraries: libsundown.so: cannot open shared object file: No such file or directory
The output of ls is.
$ ls
libsundown.so libsundown.so.1 sundown.c sd
Why is the shared library not found by ld?
回答1:
Short solution:
add . (or whatever it is from your -L flag) to your LD_LIBRARY_PATH. When you run sd, it'll look for libraries in the standard places and the LD_LIBRARY_PATH. Note that since you've added ., this will only work if you run sd from the same directory libsundown.so is in.
I plan on distributing the compiled binary. How can I do so that the library can be distributed without forcing people to edit their LD_LIBRARY_PATH?
You should install libsundown.so in one of the standard places, like /usr/lib or /usr/local/lib. You can do that with an installer or a make file, or something as simple as a INSTALL or README that tells the user to stick the libraries there and ensure the permissions are set to something sensible.
来源：https://stackoverflow.com/questions/11111293/why-is-my-shared-library-not-found