Library problem

[zoran404]

I have a problem. I created a library and I can't remember how to use .a and .o files in a project.

While I was writing it I used
#include "folder/libr.hpp"
#include "folder/libr.cpp"
in my test project.
But I want to include just .hpp file and use .a or .o file.

I did this before but from some reason I can't get it to work now. I think it has something to do with parameters.

I'm using wxDEV.

[MiiNiPaa]

Find where to add additional library to linker list. Read compiler documentation.

[zoran404]

Can't find it.

[zoran404]

Come on people. How do I use .a or .o files.

[MiiNiPaa]

I believe not many people uses wxDev and ever less want to read your compiler documentation for you aloud.
Here is help file you need:
http://wxdsgn.svn.sourceforge.net/viewvc/wxdsgn/trunk/wxdevcpp/Help/html/linking_libs.html

[zoran404]

I already tried putting .a file in the linker. That is why I need help with this [Linker Error] undefined reference to '...' problem.