Orbotech is using GCC for C++ version 3.4.3 on Fedora 5 We want to move to GCC version 4.1.1 on Fedora 6 or Centos I looked for any binary compatible statement between 3.x and 4.y but I didn't find any. A found some Q&A that are somewhat ambiguous Can you direct me to (or send me) a formal statement ? Regards Shlomit Shlomit Morad Software Department Manager R&D Infrastructures Orbotech Ltd. P.O.Box 215 Yavne 81102, Israel Tel: +972- 8 - 9423718 Fax: +972 - 8 - 9423250 www.orbotech.com