This is an odd one which I will continue to try to debug. A recent change added CONFIG_MAC80211_MESH to the fedora kernel. Oddly this causes gcc to hang when building net/mac80211/debugfs_netdev.c. I originally suspected a gcc-4.3 bug but I then reproduced this on RHEL5 with gcc-4.1.2. This code is not yet in Linus's tree. Could someone point me to the git tree where it lives? I am thinking a git-bisect may help me find the specific change that causes this. In the meantime it would be greatly helpful if we could add the following to config-ia64 and config-ia64-generic: # CONFIG_MAC80211_MESH is not set This along with the change to not apply the utrace patch (see my earlier mail) once again allows ia64 to build. thanks, - Doug