https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61257
--- Comment #6 from Tom Tromey <tromey at gcc dot gnu.org> --- (In reply to Eric Gallager from comment #4) > (In reply to Sergei Trofimovich from comment #3) > > (In reply to Sergei Trofimovich from comment #2) > > > Having explicit flags like --enable-systemtap / --disable-systemtap (glibc > > > has those) would fix the issue. > > > > Proposed upstream as: > > https://gcc.gnu.org/ml/gcc-patches/2018-05/msg00578.html > > > > To clarify: it's not a complete fix for this bug. Only a way to disable > > support manually. > > I'll take this as confirmation. Also now that I've seen the actual code in > this patch, I can say that my previous comment (comment #1) no longer > applies, since the script is just doing `test -f` instead of > AC_CHECK_HEADERS. IIRC that's because it has to check target headers, but AC_CHECK_HEADERS checks host headers. Maybe there's some other way to do it, I don't know. It's fine to really check the header, but I would say the scenario in comment #2 has to fall under "don't do this". That said, a --enable flag or whatever also seems fine to me.
