I'm also having the same problem with the 2.6.12 source and debian. Going by ndiswrappers make file it uses $KSRC/include/linux/version.h to verify the kernel source is there. It looks like in 2.6.12 and up (it might be like it earlier but i havent tested) this file is missing.

A little bit of digging through the main Makefile for the linux source revealed that it is a generated file.
I used the following to generate it
Now my ndiswrapper is attempting to compile. It generates a load of warnings but it is at least a step forwards

there is a new version, the 1.4rc1
i've got the same problem to compile the 1.3rc1 with 2.6.13, with the new version it's ok

BUT now my problem is "Kernel Panic" when i load the module

Do you still have the 2.4.x kernel installed?

no, at least i've the 2.6.8 from the debian sarge installation
i tried also on it, no kernel panic bue loading module error

I have ndiswrapper in my Slackware 10.2 with kernel 2.4.31 and works very well.

Use ndiswrapper version 0.11, i tested others version but cannot compile in slackware 10.2.

1 - Install the kernel-2.4.31 source

2 - Get the ndiswrapper-0.11 and compile.

Hi all

Just tried building ndiswrapper 1.4rc1 on my Slackware 10.2 box, kernel 2.6.13 and that went without any problem.
During build I get warning about the kernel using 4K stack size, and that you might expect the Windows driver to crash the kernel at sometime (Windows drivers seem to demand 8, some even 12K stacks) and that you should in fact rebuild the kernel and remove 4kstacks (the CONFIG_4KSTACKS option).

Regarding the OP's problem with compiling, I suspect that you're using vanilla kernel sources? You should at least have run "make oldconfig ; make dep" (although I'm not sure if 'make dep' is still needed with 2.6 kernels. For 2.4 kernels that is mandatory).

Cheers, Eric

Replying to myself here :-)
I checked the ndiswrapper Makefile, and the 2.6 kernel configuration process, and it looks like:

• the stock Slackware 2.6 kernel uses 8K stack size. Since the stack size is only configurable in the "Kernel hacking" section and by default 4K stacks is not turned on, the option "CONFIG_4KSTACKS" does not even appear in the kernel's .config file
  
• ndiswrapper checks for the existence of the word "CONFIG_4KSTACKS" in the kernel's .config file to determine if you have a kernel with 4K stack size, and spits out warnings if that is not found.

My conclusion, this is all harmless chatter, and ndiswrapper should function normally on a Slackware box. Can someone test this and report back?

Binary package for the 2.6.13 kenel, as well as a build script, tarball et.al. are available at my SlackBuild repository

Cheers, Eric