Ok, let's back up here a tad. 1) What is your purpose for doing this build of X11 on Tiger? 2) Why are you autoreconf-ing everything? That often won't even work unless you have all the dependents available (which sometimes isn't the case) because of bad autotools etiquette when the packages are put together... As I mentioned before, jhbuild / build.sh doesn't work on Leopard let alone Tiger. The build process is quite complex, and I want to get jhbuild / build.sh working on Leopard soon, but I haven't even looked into it much yet. Most of the patches are integrated into upstream except these: http://people.freedesktop.org/~jeremyhu/not.committed/ The libxcb one isn't in because I don't have commit access there yet, and I don't think the libXt one is really needed... libXaw has fixes in git that aren't in a tarball yet... so you need git for that. For everything else, just use the released tarball and don't worry about autoreconf -fvi stuff. but again... what's the point to all of this?