Intel 855GM: DRM unusual compilation

[Steven J Newbury]

On Thu, 2008-08-14 at 14:07 +0000, "marco V." wrote:
> hi at all,
> 
>    I've a strange problem compiling kernel module for 855GM chipset.
> Downloades driver source from: 
>         git-clone git://anongit.freedesktop.org/git/mesa/drm
> I compile with no problem libdrm libreries using commands; 
>         ./autogen.sh --prefix=/usr --exec-prefix=/usr
>         make
> then I compile kernel modules: 
>         make -C linux-core
> the unusual thing is that compilation of some modules ( such as drm
> and i810 ) work fine, but for others modules ( such as i830 and i915 )
> there are neither compilation steps  nor  errors!?
> Any idea/help?
The git master drm has been merged with GEM which requires changes to
the kernel.  To attempt to build the GEM drm modules you need to define
OS_HAS_GEM=1 in your environment.