Re: 2.5.37+ i386 arch split broke external module builds

Alessandro Amici (alexamici@tiscali.it)
Wed, 2 Oct 2002 23:06:09 +0200


On Wednesday 02 October 2002 13:28, David Woodhouse wrote:
> alexamici@tiscali.it said:
> > in order to access the kernel interfaces, modules that live outside
> > the kernel sources were used to only need: CFLAG += -I$(TOPDIR)/
> > include
>
> That was broken anyway -- you always got the CFLAGS wrong if you just did
> that. The only way that I only of to get the CFLAGS to match the kernel
> build reliably is to do something like:
>
> make -C /lib/modules/`uname -r`/build SUBDIRS=`pwd` modules

that one is the hacker way, the most powerfull and most correct for sure :)

however the average user of an external device driver (in the specific case
i'm interested in distributing the rivatv driver found at
http://rivatv.sf.net) is not going to have the source tree where the stock
kernel he is running was built.

average users may have either a kernel-headers package that matches their
running kernel and/or a souce package without the configuration stuff. in
both cases 'the hacker way' doesn't work :)

OTOH, for small device drivers you don't need the full blown kernel CFLAGS,
you know what you need anyway.

this is a user-, distribution-friendlyness issue :), we actually hit it in
real life.

cheers,
alessandro
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