C++ pthread Error on Eclipse.

So here it is the path to configure the library that I was missing for my code to compile. Basic but if you don't know can be annoying.

right cklick on the project in the

project explorer -> properties -> c/c++ build

ONCE  you are in the  C/C++ Build settings. you proceed like this:

c/c++ build -> Settings -> linker -> libraries -> add -> pthread ->

once you add the library  you click OK and Rebuild

ok -> rebuild

That should do the trick for: pthread_create and the such.