Thanks to all who answered. Looking again at my own object code, whether using the STL introduces dependencies to libstdc++ seems to depend strongly on which features you use - some only depend on symbols which are also found in libsupc++.a, others have real dependencies - e.g. map depends on RB tree code in libstdc++, and something in my code (haven't checked what yet) depends on bad_alloc. I also have a feeling though (which may or not be correct) that some templates are assumed to be instantiated in libstdc++, and that g++ will not always instantiate them when it finds them in .cc files. _________________________________________________________________ Explore the seven wonders of the world http://search.msn.com/results.aspx?q=7+wonders+world&mkt=en-US&form=QBRE