title: How to set up gtkmm on Ubuntu
body: <p>I want to get into developing GUI applications with GTK+. Following some instructions, I downloaded the gtkmm package and its dependencies. However, when I try to compile the GTK+ application, g++ throws me this error: <code>g++: error: pkg-config gtkmm-3.0 --cflags --libs: No such file or directory</code> I believe it does this because it can't link the libraries, but how do I fix this?</p>