[ILUG] compiling a single module, rh6.2...

[Fergal Daly]

Not sure about the mangling but when I want to compile a single modules, the
best I've come up with is to recompile as little as possible. I have no idea
if I'm breaking some cardinal rule here but try this.

Find the kernel config file.

Go have a look in that file for the symbols that are relevant to the stuff
you want, the names are fairly obvious. Obviously you only want the ones
that have =m. Remember these symbols (often just 1 symbol)

(after backing up the original)

perl -pi -e 's/=m$/=n/' config

Now edit the file and change your symbols back to =m and

cp config /usr/src/linux/.config

make dep
make clean
make modules

Only one module will actually be built and hopefully gcc will have gotten
all the same options as it did originally. If not, at least your make
modules should be quite snappy now, so you can do further messing about a
bit faster. I'm hoping that the new CML2 yokey and all the stuff they're
going to do with the make files in 2.4.5 will result in a standard and easy
way to compile single modules but I'm probably wrong,

Fergal

On Mon, Jul 09, 2001 at 12:46:28AM +0100, kevin lyda wrote:
> ok, so i have the kernel source for my upgraded kernel.  i want to rebuild
> just loop.o.  this seems impossible.  can it be done?  make loop.o in
> drivers/block doesn't bring joy.
> 
> my solution at the moment is to rebuild the entire tree:
> 
>     # cp configs/kernel-2.2.17-i586.config .config
>     # (make dep; make clean; make; make modules) > /dev/null 2>&1
>     # nm drivers/block/loop.o | grep exit_files
>              U exit_files
>     # nm /lib/modules/2.2.17-14/block/loop.o | grep exit_files
> 	     U exit_files_R2c9ad1b8
> 
> the symbols aren't getting mangled.  why not?  will i have to build a
> whole new kernel, install it, and then reboot *just* to up max_loops?
> 
> grrrr...
> 
> obviously upgrading to 2.4 will solve my problems.  that's later.
> for the moment i'd just like this to work.
> 
> kevin
> 
> -- 
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