Tom> Another option would be to write our own thing akin to "c-ctype" but
Tom> that uses the libiberty code instead.  That would work since
Tom> libinproctrace.so seems to link against libiberty.

I tried this but forgot that libinproctrace.so does not use gdbsupport
either.

I strongly dislike how libinproctrace.so was implemented.  A bunch of
cpp conditions in random files seems a lot worse than just having
separate sources, since the rules for the IPA and non-IPA cases are
different.

Tom