package/libvpx: vp8 encoder needs c++
Encoding rate control interface for v8 is implemented in c++:
65a1751e5b
and was added to libvpx in v1.12.0 which was added to buildroot with
https://git.busybox.net/buildroot/commit/?id=e4ff284ba88ea0cb41c190165cb42a174c5faa23
Disable vp8 encoding when toolchain lacks c++.
Fixes:
http://autobuild.buildroot.net/results/a3524b954e53002973b423ce23b4c43ff5281ab5/
Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
06a1a05b55