Hi, I am using one of the library which uses Boost. When I was trying to compile boost on my linux (fedora core 3) machine I was getting warnings about POSIX_C_SOURCE redefinition. I found this post http://lists.boost.org/MailArchives/boost/msg61875.php and I believe that I need to check out cvs version but not exactly sure which branch I have to check out (for verison 1.31.0). I have to use boost 1.31.0 to make this library work (an older version). My system is: Fedora core 3 python 2.3.5 boost 1.31.0 Thanks for your help. ~Regards, Ashish ----------------------------------------------- Aashish Chaudhary Technical Programmer, PRISM Email: ashish_cy@yahoo.com Ph: (480) 275-0755 -----------------------------------------------