[master] avmedia fails to link / libgltf related

Hi,

Anybody has a clue how I can unstuck my build (--without-system-glm
--without-system-libgltf) that fails with below error? I'm a bit
unsure where this symbol is supposed to come from... libgltf? glm
seems to be only headers, so not there :)

make glm.clean && make glm && make avmedia.clean && make avmedia
does not help.

[ LNK ] Library/libavmediaogl.so
/home/master/src/libreoffice/workdirs/libreoffice-4-4/workdir/CxxObject/avmedia/source/opengl/oglwindow.o:
In function `CameraHandler':
/home/master/src/libreoffice/workdirs/libreoffice-4-4/avmedia/source/opengl/oglwindow.cxx:250:
undefined reference to
`libgltf::gltf_get_camera_pos(libgltf::glTFHandle*,
glm::detail::tvec3<float>*, glm::detail::tvec3<float>*,
glm::detail::tvec3<float>*)'
collect2: error: ld returned 1 exit status
/home/master/src/libreoffice/workdirs/libreoffice-4-4/avmedia/Library_avmediaogl.mk:10:
recipe for target
'/home/master/src/libreoffice/workdirs/libreoffice-4-4/instdir/program/libavmediaogl.so'
failed
make[1]: ***
[/home/master/src/libreoffice/workdirs/libreoffice-4-4/instdir/program/libavmediaogl.so]
Error 1