Is it theoretically possible to use libstdc++.so.5 (from gcc 3.2.x or 3.3.x) with gcc 3.4, after some header fixes? Will they be ABI compatible? Migrating everything to libstdc++.so.6 is a large undertaking for me, and the headers from RH9 gcc (3.2.2) didn't compile with 3.4 last time I tried, even with -fpermissive. Thank you. [Please CC me]