On Wed, 16 Mar 2022, 00:37 James K. Lowden, <jklowden@xxxxxxxxxxxxxxx> wrote: > > I've done a complete rebuild after > "make distclean". And still no joy. > Not an answer to your question (sorry), but it's more reliable to just remove the entire build directory and rebuild in a new, empty directory. The 'clean' and 'distclean' targets are created by automake but not really maintained (or used) by anybody. You should be building outside the source tree in a dedicated build directory anyway, so just removing the whole thing is easy and doesn't affect the source tree. https://gcc.gnu.org/wiki/FAQ#configure