install the devel package for your kernel... I mean for kernel-smp-2.6.9-5.0.3.EL.i686.rpm you have to install kernel-smp-devel-2.6.9-5.0.3.EL.i686.rpm This will install /usr/src/kernels/2.6.9.xxxxx and two links pointing to this: /lib/modules/2.6.9-5.0.3.ELsmp/build /lib/modules/2.6.9-5.0.3.ELsmp/source I compiled and loaded successfully few kernel modules like drbd, nvidia and ati drivers. I hope this helps Cheers, Bruno Steven Frazier ha scritto: >Has anyone built asterisk on Centos 4? > >With 2.6 kernel (Fedora Core 3), I use to be able to do: > >ln -s /lib/modules/2.6.9-1.667/build/ linux-2.6 > >In order to compile zaptel. > >There is no "build" subdirectory in Centos 4. > >