I didn't have the source in my repository list. After reloading my package information, I've been able to run the command line: "apt-cache showsrc gtk+2.0 | grep tiff" and it shows :
Build-Depends: debhelper (>> 4.0.0), gettext, pkg-config, libglib2.0-dev (>= 2.12.0), libpango1.0-dev (>= 1.12), libatk1.0-dev (>= 1.9), libx11-dev, libxext-dev, libxi-dev, libxrandr-dev, libxt-dev, libxrender-dev, libxft-dev, libxcursor-dev, libxkbfile-dev, libxinerama- dev, libxfixes-dev, libcairo2-dev (>= 1.2.0), libtiff4-dev, libjpeg62-dev, libpng12-dev, docbook-utils, linuxdoc-tools-text, gnome- pkg-tools, libcupsys2-dev but I don't know if this is the right way to proceed, but I uninstalled the libtiff4 and synaptic didn't complain about having to uninstall the dependencies. Neither complained when I reinstalled the gtk+2.0-dev about having to install the dependencies. -- libgtk2.0-0-dev needs libtiff4-dev https://launchpad.net/bugs/61853 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs