I am doing migration from GCC 3.4.3 to GCC 4.1.2.While doing that compilation is success after some errors.But while linking, it throws tons to "undefined reference to" errors.I am using libtool as well but the version is 1.5.10.Whether I need to upgrade libtool too? How to solve this problem ("undefined reference to")? -- View this message in context: http://www.nabble.com/Migration-from-GCC3.4.3-to-GCC4.1.2-tp23295500p23295500.html Sent from the gcc - Help mailing list archive at Nabble.com.