https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123976
--- Comment #101 from Peter Dyballa <Peter_Dyballa at web dot de> --- The build build the docs with makeinfo 4.8 and failed in libgcc due to missing symlink "md-unwind-def.h". Going to un-change the three .MK files and starting anew.
