Hi GCC HelpDesk, According to this web page: http://www.linuxfromscratch.org/lfs/view/development/chapter06/gcc.html Is this the recommended configuration for normal platform: ../gcc-4.8.1/configure --prefix=/usr \ --libexecdir=/usr/lib \ --enable-shared \ --enable-threads=posix \ --enable-__cxa_atexit \ --enable-clocale=gnu \ --enable-languages=c,c++ \ --disable-multilib \ --disable-bootstrap \ --disable-install-libiberty \ --with-system-zlib Or GNU has its own recommendation or guide (like typical platform configure params combinations)? Since C++11 implements language level thread module, how should I interpret --enable-threads=posix? Thanks. Ming CHENG 20 Cecil Street #17-02/04 Equity Plaza Singapore 049705 FlexTrade Systems Pte. Ltd. D: +65 6829 2578 www.flextrade.com