More things to do with Synopsys Designware System Level Library.
Just so you know:
When they say use gcc-3.3.6, they mean gcc-3.3.6. RHEL3 shipped with gcc-3.2.X and RHEL4 with gcc-3.4.X. Both build models without errors but when executed segfault.
I am building a copy of gcc-3.3.6 now following this excellent guide by Tellurian.
More to follow.