Open up a console and type:
If you see something as an output then we 're on the right track.
To your project now:
Project->Build Options->Compiler->Other Options add `wx-config --cflags` in there
Project->Build Options->Linker->Other Options add `wx-config --libs` in there
One final thing (don't know if this one is fixed). There is a bug that won't let the linker options work correctly so also do the following:
Project->Properties->Generate pch in a directory alongside... (the first option from above)
Enjoy...
P.S. what linux distro are you using? You don't *really* need to build wxWidgets from source, installing wxGTK from your distro's repository should be enough.