"Rathi, Dinesh" <drathi@xxxxxxxxxxxxxxx> writes: > Are these versions binary compatible with each other on Linux 64 (intel > arch)? I need to use a shared library built using gcc 3.4.3 and will be > building my executable using gcc 4.1.1. They are generally compatible. There are some obscure C++ corner cases where they are not compatible, but you are very unlikely to encounter them. If you ask a question along these lines in the future, be sure to specify which language you are asking about. Ian