Building par2cmdline from source? You'll need this patch.

http://sourceforge.net/p/parchive/bugs/74/

^This is a patch for people running gcc 4+. Use the patch command to apply it.

And then do the normal, ./configure, make, make install

Mario Loria is a builder of diverse infrastructure with modern workloads on both bare-metal and cloud platforms. He's traversed roles in system administration, network engineering, and DevOps. You can learn more about him here.