[Buildroot] bug in xserver compilation?

[daggs]

Greetings Yann
> Dagg, All,
> 
> On 2016-07-28 22:56 +0200, daggs spake thusly:
> > I'm trying to add a new ddx driver to buildroot from aarch64 and I've encountered a strange issue.
> > so I've decided to try and reproduce it with are more stable env, Iv'e ran make pc_x86_64_bios_defconfig, then entered menuconfig.
> > in it I've enable c++ support, modular xserver and finally the intel xf86 video.
> > I've hit make and waited, when buildroot got to xserver. it failed with the following error more than once:
> > /home/dagg/workspace/buildroots/buildroot-master3/output/host/usr/x86_64-buildroot-linux-gnu/sysroot/usr/include/xf86drm.h:40:17: fatal error: drm.h: No such file or directory
> >  #include <drm.h>
> 
> The xdriver_xf86-video-intel was updated just tonight. Did you observe
> the build failure before it was updated, or after it was?
> 
> Regards,
> Yann E. MORIN.
>

I didn't updated my local copy lately.
the issue in hand is with xserver and libdrm.
it seems that libdrm is installed but zserver doesn't find it in the include path. see the compilation error and the find output I've attached.

Dagg.
 
> > I've ran a sanity check on the output dir:
> > dagg at NCC-5001-D ~/workspace/buildroots/buildroot-master3 $ find output/ -name drm.h
> > output/host/usr/x86_64-buildroot-linux-gnu/sysroot/usr/include/drm/drm.h
> > output/host/usr/x86_64-buildroot-linux-gnu/sysroot/usr/include/libdrm/drm.h
> > output/build/libdrm-2.4.70/include/drm/drm.h
> > output/build/linux-headers-4.6.3/usr/include/drm/drm.h
> > output/build/linux-headers-4.6.3/drivers/gpu/drm/tegra/drm.h
> > output/build/linux-headers-4.6.3/include/uapi/drm/drm.h
> > output/target/usr/include/libdrm/drm.h
> > 
> > I think this is a bug, am I wrong?
> > 
> > the actual config I've used can be found at http://bpaste.net/show/45998ef4aed6
> > 
> > Dagg.
> > _______________________________________________
> > buildroot mailing list
> > buildroot at busybox.net
> > http://lists.busybox.net/mailman/listinfo/buildroot
> 
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