Why LD_LIBRARY_PATH is BAD and the correct way to load dynamic libraries

Question

So, I have a program that runs with OpenBlas and I want to compile it. The linking process looks like this:

gcc -o prog prog.o -O3 -I/opt/OpenBLAS/include -L/opt         


        

Answer 1

Add the path to the runtime library search path.

gcc -Wl,-rpath=/opt/OpenBlas/lib ...

What the -L option does at link time, the -rpath option does at run time.