Re: [Xenomai-core] [rfc] Building Linux kernel in Xenomai tree.

[Philippe Gerum <rpm@xenomai.org>]

Gilles Chanteperdrix wrote:
> Hi,
> 
> attached is a patch of Xenomai trunk build system to allow building
> Linux kernel as part of Xenomai build process. This way, typing make
> install builds and installs the Linux kernel, kernel modules and
> Xenomai.
> 
> The patch is a bit young and still has a few drawbacks, but before
> spending to much time on it, I would like to know if anyone is opposed
> to the idea of building Linux in Xenomai build tree.
> 
> To try this patch, apply and run the bootstrap script.
> 3 options are then added to configure :
> --enable-linux-build    Build Linux in Xenomai build tree
> --with-linux-srcdir     specify the path to Linux sources. Default is to
>                         use, if not cross-compiling, the source of the
>                         running kernel or /usr/src/linux.

--enable-linux-build=<linux-tree> ?

> --with-adeos-patch      specify the path to the Adeos patch. Default is to
>                         infer the patch name from Linux kernel version.
> 
> When using the --enable-linux-build option, configure creates a linux
> tree in Xenomai build tree, and run the prepare-kernel.sh script for
> this tree. Typing "make" re-runs prepare-kernel.sh (in case some changes
> occured in Xenomai sources) and run make in the kernel tree.
> 
> Known limitations are:
> - it is not very well tested, so, maybe some error cases are not handled
>   correctly ;
> - it is not tested with Linux 2.4 ;
> - for an unknown reason, xenomai modules are built every time
>   prepare-kernel.sh is run ;
> - the cross-compilation prefix is inferred from the CC variable, it
>   should work in most situations, but not all.
> 
> Happy new year.
> 
> 
> 
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-- 

Philippe.