gcc build with -O0 results in corrupted -debuginfo package

Hello list, I'm trying to rebuild bind-9.9.4-12.P2.fc20.src.rpm with CFLAGS="$CFLAGS $RPM_OPT_FLAGS -O0 -ggdb". I did the simplest possible thing - edited the original spec file (see spec.diff) and built the package: $ rpmbuild -ba bind.spec The package builds and BIND itself seems to work. The problem is that new debuginfo package is missing 118 out of 283 header files in /usr/src/debug/bind-9.9.4-P2. It seems that "-O0" alone (instead of "-O0 -ggdb") causes the same problem. I would be glad if anyone can give me advice how to debug this. Original packages from Fedora 20 (with all headers in /usr/src/debug): http://koji.fedoraproject.org/koji/buildinfo?buildID=502596 Packages built with -O0 -ggdb (scratch build): http://koji.fedoraproject.org/koji/taskinfo?taskID=6778483 Thank you for your time! -- Petr^2 Spacek