I need to use #define __SIZEOF_LONG__ 4 instead of #define __SIZEOF_LONG__ 8 in amd64 so my program will not double the memory usage how Can i do so? using debian and gcc 4.4.4 -- View this message in context: http://old.nabble.com/SIZEOF_LONG-4-instead-of-8-in-64-bits-tp28598575p28598575.html Sent from the gcc - Help mailing list archive at Nabble.com.