This FTBFS is actually caused by Doxygen 1.8.8 ACE 6.2.7+dfsg-1 builds fine with Doxygen 1.8.7, on all platforms
Doxygen 1.8.8 is causing trouble with other packages (e. g. with my own witty, see bug #758975) -- Pau Garcia i Quiles http://www.elpauer.org (Due to my workload, I may need 10 days to answer)
