https://gcc.gnu.org/bugzilla/show_bug.cgi?id=48996
--- Comment #7 from Paul Smith <psmith at gnu dot org> --- I haven't seen this issue in a while and don't care enough to try to reproduce it or to have it reopened, but as far as I can see the problem was pretty clearly in the fixincl tool that comes with GCC. I don't know if that's considered "C FE" or not; perhaps I mis-categorized it. Fixincl was adding __inline__ to functions in header files it was fixing, quite inappropriately (in this case anyway).
