Hi list! Today, I upgraded my development machine to Feisty. All went nicely (I have a NVidia card and used envy in Edgy to install the latest driver. I uninstalled the envy-driver and envy prior to upgrading, as it is advised and then installed the nvidia driver in feisty again. No need to use envy anymore, since a fairly recent version is in the official repos). But when I tried to recompile a project I'm working on ld exited with an error that libGL was not found. Since I haven't uninstalled any packages after the upgrade, I was very surprised, that things don't work any more. So I began to investigate the case :-) I found out that libgl1-mesa-* (the glx version in my case) provides libGL.so, so I imagined that libgl1-mesa-*-dev would provide the corresponding development libraries (libGL.a). Strangely, there is no libgl1-mesa-glx-dev, but the description of libgl1-mesa-dev said that this package provides the dev files for GLX. I installed this package, but my project's build error did stay... So I inspected the package (libgl1-mesa-dev) closer: I saw that this package does not include any headers and dev libraries, as one would imagine... So finally coming to my question: What package provides libGL.a in Feisty? Thanks in advance for any answers! cheers, Severin