Ok, thats saying you didn't read the "Requirements" section of the README where it says you need the development packages for GTK and its dependencies to compile Geany. You probably have the runtime part, but not the development package. I understand why some distros split the development part from the runtime part, but it doesn't help to get you going.
The error message isn't ours, `autogen.sh` is a tool from the autotools project that writes and then runs the `configure` script, the message is from the `configure` script that `autogen.sh` wrote. I guess autotools is out of date with its links, or your distro is supplying an old version. It always a tension as to how much existing knowledge a README should assume. Its purpose is to allow people building from source to do so, not to be an education into how to build software. But sure it can be a learning curve if you havn't done much building from source before. --- Reply to this email directly or view it on GitHub: https://github.com/geany/geany/issues/847#issuecomment-169504402
