# Dynamic libraries
**Dynamic libraries** are like static libraries, with the exception that they're not bundled them along with our program and only load them when needed.

As a starter, you can create dynamic libraries by passing some options to a compiler like [gcc](./Linux/Programs/Dev/gcc.md):

1. Compile library functions with the ``-fPIC`` options
2. Create the dynamic library with ``-shared -o libcool.so.1 func1.o func2.o``
3. Link everything with ``-L. -l:libcool.so.1``

> Here, the ``-L.`` tells gcc to use the current dir too when searching for libraries (add to the library search path)

Then you can run it with ``LDD_LIBRARY_PATH=. ./coolprogram``

One thing to note is that glibc usually gets implicitly dynamically linked on every build you do, even if you don't use any STL function. Too bad.

@research: how to run normally without specifying library path