On Mon, Sep 17, 2001 at 05:17:27PM +0100, John Levon wrote: > On Mon, Sep 17, 2001 at 04:32:47PM +0200, Erik Mouw wrote: > > The linux kernel only guarantees _source level_ compatibility for > > kernel modules, not _binary level_ compatibility (unless there is a > > very good reason to break the source level compatibility). > > /me coughs > > I wish that were really true ;) A piece of code I wrote for linux-2.4.0 still compiles for 2.4.9, while I can't insmod the 2.4.0 module into 2.4.9. I hope you're not promoting the use of binary-only modules... ;) > Anyway, people should check out CIPE's autoconf script which handles > finding the kernel source tree nicely. Why? /lib/modules/`uname -r`/build/ just *points* to the kernel source of the kernel you're running right now: erik@arthur:~ >uname -a Linux arthur 2.4.9-ac10 #1 Mon Sep 10 19:34:09 CEST 2001 i686 unknown erik@arthur:~ >ls -l /lib/modules/`uname -r`/build lrwxrwxrwx 1 root root 25 Sep 10 20:07 /lib/modules/2.4.9-ac10/build -> /usr/src/linux-2.4.9-ac10/ The "build" link was introduced to make it trivial to find the kernel source. Erik -- J.A.K. (Erik) Mouw, Information and Communication Theory Group, Department of Electrical Engineering, Faculty of Information Technology and Systems, Delft University of Technology, PO BOX 5031, 2600 GA Delft, The Netherlands Phone: +31-15-2783635 Fax: +31-15-2781843 Email: J.A.K.Mouw@its.tudelft.nl WWW: http://www-ict.its.tudelft.nl/~erik/ - Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ IRC Channel: irc.openprojects.net / #kernelnewbies Web Page: http://www.kernelnewbies.org/
