Hi There, When I give gcc -v on kaldera version 3.1.1,It gives me the following Thread model:single & Gcc version Number [1]So,If my program is multithreaded, & the thread model is "Single",Will the libraries like STL etc be thread safe. [2]Should I have to change the Thread Model to "PThread" then... Hoping to get a reply soon & Thanking u.. Mohammed