So that the -base libs can figure out the right include paths for the
gobject-introspection tools even if core got installed into a prefix
that's not the same prefix as gobject-introspection is installed in
or it's being build in an uninstalled gstreamer setup.
If we force -DG_THREADS_MANDATORY onto apps, then g_thread_supported()
will always evaluate to TRUE, so the typical thread initialisation
boilerplate code if (!g_thread_supported()) g_thread_init(NULL); will
no longer work, and the threading system not be initialised and us
printing a warning in gst_init. This may be fine in most cases, since
late initialisation is allowed and automatically done in g_type_init()
since GLib 2.23.2, but let's be cautious and only use this define when
compiling GStreamer itself.
See #608398.
We require threads to be supported in any case and defining this
will simplify the mutex, condition variable, etc. macros from gthread
to not always check if threads are really supported.
Fixes bug #607481.
Original commit message from CVS:
* pkgconfig/gstreamer-uninstalled.pc.in:
* pkgconfig/gstreamer.pc.in:
Remove -lgstcontrol-0.10 which never worked anyway as the lib is
called gstcontroller-0.10.
Original commit message from CVS:
Port some changes from 0.6.0/0.6.1 back to HEAD (.pc files moved to pkg-config/, .m4 file moved from plugins to core)
