Sorry, I was not clear enough: I need to 1)first patch the NEW kernel (to have better time support. I want to add the patch of Alexander Gordeev for better PPS(=Pulse Per Second) support) 2)then compile some apps in userland (mainly pps-tools which is needed by LinuxPPS). Specially the LinuxPPS group say concerning the installation of pps-tools* "Optionally*, when we have older header files, we update the header files using the versions from your new kernel. $ cd /usr/include $ mv linux linux.old $ mv asm asm.old $ mv asm-generic asm-generic.old $ ln -s /lib/modules/$(uname -r)/build/include/linux linux $ ln -s /lib/modules/$(uname -r)/build/arch/x86/include/asm asm $ ln -s /lib/modules/$(uname -r)/build/include/asm-generic asm-generic" So may can confirm that I should keep the new headers for step 1 and 2 and reinstall the old one after (as Kyle told me)? Ryad On Fri, Oct 15, 2010 at 5:27 PM, Josh Boyer <jwboyer@xxxxxxxxx> wrote: > On Fri, Oct 15, 2010 at 11:19 AM, Ryad Ben-El-Kezadri > <ryad.bek@xxxxxxxxx> wrote: > > Indeed, I made a mistake: > > the new headers are installed at the end of the installation process > > with (see http://fedoraproject.org/wiki/Docs/CustomKernel): > > su -c 'rpm -ivh kernel-<version>.<arch>.rpm > > kernel-firmware-<version>.<arch>.rpm > > kernel-headers-<version>.<arch>.rpm kernel-devel-<version>.<arch>.rpm' > > > > But still the problem is the same: > > I need to > > 1)first patch the kernel > > 2)then compile some apps in userland > > > > and I do not know what kernel headers version (old or new) to use for > step 1 > > and step 2. > > > > Ryad > > > > PS: here is what I got when I do > > rpm -qa | grep kernel-headers > > kernel-headers-2.6.33.3-85.fc13.i686 > > kernel-headers-2.6.35.6-43.fc13.i686 > > If you don't know what kernel version you need to patch, we certainly > won't either. Especially when we have no idea why you need to patch > it, or what the patch does. > > Also, building applications against kernel headers is a practice that > is generally discouraged overall. > > josh > _______________________________________________ kernel mailing list kernel@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/kernel