Created attachment 4241 [details] diffoscope output demonstrating the bug. libc6-dbg As seen in the attached diffoscope file, the distributed file "plural.c" contains absolute paths, courtesy bison parser.
Patch sent to the ML: https://patchwork.openembedded.org/patch/149703/
merged: http://git.yoctoproject.org/cgit/cgit.cgi/poky/commit/?h=sumo&id=77788311396df25ccb48ba9036e4f0d5fe333907