> I can not figure out how to force g++ to use v3.4 headers and link my > programs against 3.4 version instead of v3.3 ( default behavior ). You should not do this. The compiler and library changed ABI between 3.3 and 3.4. Linking 3.3 to 3.4 is a mistake, and likewise for linking 3.4 to 3.3. -benjamin