Mike
Thank you for the information. I have successfully built a new kernel
with the win4lin patch. This has resolved all of the problems I had
encountered with the w4l kernel for RH7.1.
thanks again
On Thu, 21 Jun 2001, Mike Barnes wrote:
> David Frager wrote:
> > When I install from the RH distro. CD, the kernel is built during the
> > installation process, however, there is not a .config file created.
>
> Not quite right.
>
> The kernel is never "built" during install, rather a kernel is selected
> from the avialable packaged kernels and installed. As for how those
> kernels are actually built ... If anyone's not inerested, stop reading
> now. I'm going to wander off from the Win4Lin topic here.
>
> > I have attempted to build the kernel with the W4L patch, however, without
> > the original .config file, I keep missing components that were discovered
> > at initial install time. I there a way to generate this file once
> > booted??
>
> What you've most likely got installed (under /usr/src/linux-2.4 if
> you're running 7.1) is the kernel-source RPM. This is not what the
> kernels are built from. They're built from the kernel "source RPM", not
> the "kernel source" RPM.
>
> With me so far? :)
>
> If you look under your source tree in /usr/src/linux-2.4/configs you'll
> find a whole bunch of files. These are the various .config files that
> were used by RedHat to generate the kernels. Pull one out of there that
> matches your system and configure from that.
>
>
>
>
>
>
> I'm now going to digress even FURTHER into la-la land and explain how
> kernels are built from source RPMS in case anyone is interested. Bail
> out now if your ears are already starting to bleed.
>
>
>
>
>
>
> If you're brave, you can start investigating the wonderful world of the
> Source RPM. Go you your favorite RedHat mirror site, or pop in the
> Sources CD if you bought a boxed set (I don't have such things nearby so
> I apologise if I get a few path and file names wrong here).
>
> Somewhere in that lot is an SRPMS directory, and one of the items in it
> will be something like kernel-2.4.2.src.rpm. Grab that and install it
> (rpm -i).
>
> This will NOT unpack in /usr/src/linux-2.4 like the kernel-source RPM.
> Instead, stuff will get dumped in various directories under
> /usr/src/redhat (/usr/src/RPM under Mandrake, otherwise this is all
> pretty much the same).
>
> If you look in /usr/src/redhat/SOURCES at this point, you'll see a
> smegload of patch files and other junk, as well as a pristine
> linux-2.4.2.tar.bz file, as available at all fine kernel mirror sites.
>
> In /usr/src/redhat/SPECS is a "kernel.spec" file. This contains all the
> instructions for patching and building the various RedHat kernels. Have
> a look at it. It's plain text and mostly self-explanatory. If you change
> directory to /usr/src/redhat and run:
>
> rpm -bb SPECS/kernel.spec
>
> The kernel source will be unpacked, the various patches applied and
> kernels built. Then new kernel RPMS will be dropped into
> /usr/src/redhat/RPMS somewhere, depending on what architecture the
> kernel was built for. You can swap architectures by using the (for
> example) --target=athlon parameter with your rpm -bb command to generate
> an Athlon optimised kernel. See the rpm man page for full details on the
> build switches.
>
> If you want examples, there are a set of RPMS at
> ftp://discord.maths.monash.edu.au/pub/win4lin which are nothing more
> than the stock RedHat 7.1 kernel with the Win4Lin patch incorporated. If
> you download the SRPM you can see the changes made to the kernel.spec
> file and note the addition of the Win4Lin patch into the
> /usr/src/redhat/SOURCES directory.
>
> I tend to do this because I'm keeping a fair few machines in sync. It's
> probably not worth the hassle if it's just a personal box you're looking
> after. Stick with fishing the .config out of the configs directory and
> doing a normal kernel build.
>
> OK, I'm going to get a life now. :)
>
> Mike.
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--
David Frager
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