# Building the bundled library

If you you want to avoid a system-wide installation of libsodium’s development files just for compiling and running the tests, you can instead install the library and header files inside PyNaCl’s sources.

## Linux systems

On Linux (and presumably other UNIX-like systems), after entering the PyNaCl source directory you must execute the following commands:

    $ mkdir -p build/libsodium
    $ cd build/libsodium
    $ ../../src/libsodium/configure --prefix=$PWD --disable-shared
    $ make
    $ make install
    $ cd ../..

If all went well,

    $ ls build/libsodium/{lib,include}

should generate something like the following output:

    build/libsodium/include:
    sodium  sodium.h

    build/libsodium/lib:
    libsodium.a  libsodium.la  pkgconfig

If you now define and export the

    $ SODIUMINCL="-I${PWD}/build/libsodium/include"
    $ export SODIUMINCL
    $ SODIUMLIB="-L${PWD}/build/libsodium/lib"
    $ export SODIUMLIB

environment variables, you can instruct the compiler to use the just-installed library by simply dereferencing the path flags on the c compier command line

    $ cc ${SODIUMINCL} ${SODIUMLIB}