源码安装GCC

CentOS 6.5, odd gcc4.47

1.download gcc-4.8.2

2.make sure  gmp,mpfr,mpc is ready

3.   ./configure --prefix=/usr/local/gcc-4.8.2/ --enable-threads=posix --disable-checking --enable--long-long   --enable-languages=c,c++,java,fortran --disable-multilib

4.  make -j8

5.make install

6建立符号链接

cd /usr/local/bin

ln -s ../gcc4.8.2/bin/gcc gcc482

ln -s ../gcc4.8.2/bin/g++ g++482

ln -s ../gcc4.8.2/bin/gcj gcj482

ln -s ../gcc4.8.2/bin/gfortran gfortran482

7. setting lib

/etc/ld.so.conf   and ldconfig

ok

reference

Installing GCC: Configuration   http://gcc.gnu.org/install/configure.html