Append CMAKE_CXX_FLAGS and CMAKE_C_FLAGS instead of setting. Setting the
variables causes breakage in cross-compiled systems where sysroots and
machine types are set.
One usage of the macro remains in the bundled libmygpo-qt5. This should
be updated once the pending upstream fix was merged. qtsingleapplication
is already fixed upstream.
- Rewrite gstspectrum (1.0) to use FFTW (2x faster) and emit raw magnitude
values (not log scaled).
- Rewrite the moodbar generation code to be somewhat understandable, and
do it in Clementine instead of gstreamer.
