How do I get rid of LD_LIBRARY_PATH at run-time?

Question

I am building a C++ application that uses Intel\'s IPP library. This library is installed by default in /opt and requires you to set LD_LIBRARY_PATH both for compil

Answer 1

By /path/to/lib do you mean path to the directory containing the library, or the path to the actual file?

The -R option given a directory argument is treated like -rpath by ld, which is the option you're actually wanting here. It adds the given directory to the runtime library search path. That should work, as long as you give it the directory and not filename. I'm fairly confident about that, having done it myself, and because it's one of the hints given by libtool:

Libraries have been installed in:

/path/to/library-directory

If you ever happen to want to link against installed libraries in a given directory, LIBDIR, you must either use libtool, and specify the full pathname of the library, or use the `-LLIBDIR' flag during linking and do at least one of the following:

• add LIBDIR to the `LD_LIBRARY_PATH' environment variable during execution
• add LIBDIR to the `LD_RUN_PATH' environment variable during linking
• use the `-Wl,-rpath -Wl,LIBDIR' linker flag
• have your system administrator add LIBDIR to `/etc/ld.so.conf'

(I paste this here since conceivably one of the other options could be more desirable - for example LD_RUN_PATH can save you makefile modification)