Re: Fwd: ROCK 2.1 linux package question

Hi Florian,

> ----- Forwarded message from Florin Muntean <[email protected]> -----
>
> Date: Fri, 14 Oct 2005 11:06:39 -0400
> From: Florin Muntean <[email protected]>
> To: [email protected]
> Subject: ROCK 2.1 linux package question
> X-Spam-Status: No, score=-2.5 required=5.0 tests=BAYES_00,RCVD_BY_IP
> 	autolearn=ham version=3.0.0
>
> Hi,
> I was looking into the linux package from base repository for ROCK 2.1.
> In config-500.in file I saw this:
> if [ "$ROCKCFG_PKG_LINUX_HEADERS" = linux24 ]; then
>         pkgfork linux linux26-header stages ---3-----9
> fi
> if [ "$ROCKCFG_PKG_LINUX_HEADERS" = linux26 ]; then
>         pkgfork linux linux24-header stages ---3-----9
> fi
>
> It is this the desired behavior and why?
>
> I was thinking why are you selecting to build the header for a
> diferent version of kernel in level 3 ?

The Linux headers all programs use by default are built in stages 0 and 1, 
non-default headers are built only in stage 3. Because some programs can't 
compile against 2.4/2.6 headers, both header versions are always supplied 
(in /usr/include/linux24 and /usr/include/linux26, respectively). Default 
headers have the symlink /usr/include/linux pointing at them.

>
> My next question is:
>  How I can select to build all the modules for linux kernel 2.6 I saw
> that you are using the make no2modules in linux.conf file.
>
>   # all modules needs to be first so modules can be disabled by i.e.
>   # the targets later
>   echo "Enabling all modules ..."
>   yes '' | eval $MAKE no2modconfig > /dev/null ; cp .config .config.2
>
>
> This approach will not select all the modules. I found this by trying
> to have selected the tulip driver for net.
> Do you have any ideas on how to enable that driver ?
> For now I did modify the no2modconfig to allmodconfig that selects
> everything.

During kernel configuration, several kernel configuration files are created. 
By running './scripts/Config -cfg yourconfig' you can choose which one is 
actually used. To do this, select    
	<*>    Show expert-only and experimental options 
then
	===>  Linux Kernel Options
where you can select, among other options, between
	( ) Do not perform any automatic kernel configuration
	( ) Perform normal kernel configuration without modules
	( ) Perform normal kernel configuration including modules
The configuration including modules is the default. It does not, however, 
include all modules. This is a known bug and will be fixed sooner or later.

To modify the kernel configuration file, select
	[ ]    Apply custom kernel build configuration settings
then edit the file config/yourconfig/linux.cfg. Settings made in linux.cfg 
override settings from the automatic kernel configuration to produce the 
kernel configuration that gets used.

You can either supply a completely "hand-made" file, which means running 'make 
menuconfig' inside the kernel source tree, configuring the kernel to your 
liking, then copying the file .config to linux.cfg. You should probably 
combine this linux.cfg with
	( ) Do not perform any automatic kernel configuration
so you get exactly the kernel you configured.

Alternately, you can use
	( ) Perform normal kernel configuration without modules
or
	( ) Perform normal kernel configuration including modules
and write to config/yourconfig/linux.cfg only changes to the automatically 
generated config. E.g. to additionally build the tulip driver as a module, 
you'd create the one-line linux.cfg:
	CONFIG_TULIP=m
During 'make menuconfig', when you select the Help for a certain option, you 
can see on the topmost line how the variable for this option is called 
(CONFIG_TULIP in this case).

Have fun,
	Stefan Fiedler