Hi Raphael,
No worries. Just took a look at the log file you attached, and this one pretty much explains the problem:
error: gtk/gtk.h: No such file or directory
It's indicating that your system doesn't have the developer part of GTK2 installed.

Guessing you probably have the end user versions of the libraries, so will need to install some stuff. Probably best to do that from official openSUSE packages.

Rough list of things to install, mainly adapted from the list used for Ubuntu, is:
- autoconf
- automake
- libtool
- xorg-x11-devel
- libgnome-devel
- gtk2-devel
Installing the above ones should automatically pull in their dependencies, and hopefully that will be all that's needed.
If that still gives a problem, paste the new error log and we'll go from there.
