How can I share library between two program in c

Question

I want to use same library functions (i.e. OpenSSL library ) in two different programs in C for computation. How can I make sure that both program use a common library , mea

Answer 1

Code gets shared by the operating system, not only of shared libraries but also of executables of the same binary — you don't have to do anything to have this feature. It is part of the system's memory management.

Data will not get shared between the two processes. You would need threads in one process to share data. But unless you want that, just make sure both programs use exactly the same shared library file (.so file). Normally you won't have to think about that; it only might be important if two programs use different versions of a library (they would not get shared of course).

Have a look at the output of ldd /path/to/binary to see which shared libraries are used by a binary.