Re: alsa-drivers-HEAD does not compile against recent RHE5.1 kernels

[Takashi Iwai <tiwai@suse.de>]

At Thu, 05 Jun 2008 01:12:28 +1000,
Ben Stanley wrote:
> 
> So, if config.h is not needed in 'newer' kernels (and causes an error?),
> and is needed in 'older' kernels, it is then an error to universally
> include it in a configure test program where it causes an error if used
> inappropriately...

Well, apparently it's only RH kernels that cause the problem.
So I haven't cared about it at all.

> I think the error is not noticed in newer newer kernels because
> init_utsname is defined in newer newer kernels. (I should look into this
> statement some more.)

The problem is, as usual, RH kernels backported init_utsname in a
different way than the upstream.  This makes things really hard.


Takashi

> I think it comes down to figuring out the point between 'newer' and
> 'older' kernels and modifying the configure test appropriately to use or
> not use config.h as required. I'm not sure how that should be done.
> 
> Ben.
> 
> On Wed, 2008-06-04 at 14:15 +0200, Takashi Iwai wrote:
> > At Fri, 30 May 2008 09:37:43 +1000,
> > Ben Stanley wrote:
> > > 
> > > [PING] 
> > > 
> > > I need some help on this one. I don't know how to determine whether or
> > > not the config.h file should be included in the test program or not.
> > 
> > config.h is needed for older kernels indeed.
> > 
> > 
> > Takashi
> > 
> > > 
> > > Ben Stanley.
> > > 
> > > On Fri, 2008-05-23 at 22:20 +1000, Ben Stanley wrote:
> > > > Further to my previous email,
> > > > 
> > > > The config.log file shows the following output for the test for
> > > > init_utsname in the case of the RHEL 5.1 kernel 2.6.18-53.1.19:
> > > > 
> > > > configure:10792: checking for init_utsname
> > > > configure:10822: gcc -c -Wall -fno-strict-aliasing -g -O2
> > > > -I/lib/modules/2.6.18-53.1.19.el5/build/include
> > > > -I/lib/modules/2.6.18-53.1.19.el5/source/include  -Iinclude -nostdinc
> > > > -iwithprefix include -DKBUILD_STR(s)=#s
> > > > -DKBUILD_BASENAME=KBUILD_STR(dummy) -DKBUILD_MODNAME=KBUILD_BASENAME
> > > > -Werror  conftest.c >&5
> > > > In file included from conftest.c:52:
> > > > /lib/modules/2.6.18-53.1.19.el5/build/include/linux/config.h:6:2: error:
> > > > #warning Including config.h is deprecated.
> > > > configure:10828: $? = 1
> > > > configure: failed program was:
> > > > 
> > > > I think it is failing because of the config.h warning.
> > > > 
> > > > Ben Stanley.
> > > > 
>