https://bugs.freedesktop.org/show_bug.cgi?id=64776
--- Comment #9 from Michel Dänzer michel@daenzer.net --- (In reply to comment #8)
(no rure to generate the «../../../src/mapi/entry.c», necessary for «entry.lo». Stop.
That should only happen when switching between the master and 9.1 branches. In that case, the easiest solution is to make distclean and start from scratch.