Trying to find linux kernel source on my pc

I'm trying to compile sound card drivers for my ESS-1869 integrated soundcard on a Compaq Deskpro using info from the ALSA website and the Ubuntu forums. The first thing I found was that I didn't have a C compiler installed, so I

[COLOR="RoyalBlue"]sudo apt-get install gcc-3.4[/COLOR]

...after which the compile failed (see below)

[COLOR="RoyalBlue"]./configure --with-cards=es1869 --with-sequencer=yes --with-kernel=/sys/kernel;make;make install checking for gcc... gcc checking for C compiler default output... a.out checking whether the C compiler works... yes checking whether we are cross compiling... no checking for suffix of executables... checking for suffix of object files... o checking whether we are using the GNU C compiler... yes checking whether gcc accepts -g... yes checking for gcc option to accept ANSI C... none needed checking for ranlib... ranlib checking for a BSD-compatible install... /usr/bin/install -c checking how to run the C preprocessor... gcc -E checking for egrep... grep -E checking for ANSI C header files... yes checking for an ANSI C-conforming const... yes checking for inline... inline checking whether time.h and sys/time.h may both be included... yes checking whether gcc needs -traditional... no checking for current directory... /usr/src/alsa/alsa-driver-1.0.10 checking cross compile... checking for directory with kernel source... /sys/kernel checking for directory with kernel build... checking for kernel linux/version.h... no The file /sys/kernel/include/linux/version.h does not exist. Please install the package with full kernel sources for your distribution or use --with-kernel=dir option to specify another directory with kernel sources (default is /usr/src/linux).[/COLOR]

I've tried to use which to find version.h but have not had any success. Any ideas for a linux newbie?

-Gasman-

Do

gee@daisy:~$ uname -r
2.6.12-10-686-smp

(yours may be different). Take the 2.6.12-10 bit and do

gee@daisy:~$ sudo apt-get install linux-headers-2.6.12-10
Password:
Reading package lists... Done
Building dependency tree... Done
linux-headers-2.6.12-10 is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

(obviously, I have it installed already).

And in your ./configure options, you need --with-kernel=/usr, I think.

Thanks Flopsy :KS , I appreciate the help!

-Gasman-