Hi, How to inform GCC/G++ not to add __cyg_profile_func_enter/__cyg_profile_func_exit for a whole class, especially std classes like vector? Thanks. Ming Cheng FlexTrade Systems Pte. Ltd. 8 Kallang Avenue, Aperia #04-01/02 Singapore 339509 www.flextrade.com (Office Phone) (65) 3159 0432