On 10/22/2013 02:15 PM, GHui wrote: > I compiled gcc with the following step > 1) cd gcc-4.8.1 > 2) mkdir build > 3) cd build > 4)../configure --build=x86_64-redhat-linux --prefix=/usr/local/gcc-4.8.1 --enable-FEATURE=yes --with-gmp=/usr/local/gmp-4.3.2 --with-mpfr=/usr/local/mpfr-2.4.2 --with-mpc=/usr/local/mpc-0.8.1/ --enable-languages=c,c++ --disable-multilib > 5) make Please do not top-post on gcc-help or I will not help you. I wonder if you may be missing some libraries. glibc-devel, perhaps? "yum-builddep gcc" as root should install everything. Enterprise Linux Server release 6.0 is old. Andrew.