[Bug debug/68904] DWARF for class ios_base says it's a declaration

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68904

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Can you try:
-fno-eliminate-unused-debug-types

I bet the full type debug info is going to be emitted in a different TU which
is why GCC is not emitting it here.


Also look at the debug info inside libstdc++.so/libstdc++.a to see if the full
debug info is emitted there.