rhel6.4升级gcc到4.8.2

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rhel6.4升级gcc到4.7.2

默认的版本是4.4.7，需要升级到4.7.2

$ wget ftp://gcc.gnu.org/pub/gcc/infrastructure/gmp-4.3.2.tar.bz2$ tar -jxf gmp-4.3.2.tar.bz2$ mkdir /usr/local/gcc$ cd gmp-4.3.2$ ./configure --prefix=/usr/local/gcc/gmp-4.3.2 --build=x86_64-linux$ make -j4$ make check$ sudo make install$ wget ftp://gcc.gnu.org/pub/gcc/infrastructure/mpfr-2.4.2.tar.bz2$ tar -jxf mpfr-2.4.2.tar.bz2$ cd mpfr-2.4.2$ ./configure --prefix=/usr/local/gcc/mpfr-2.4.2 --with-gmp=/usr/local/gcc/gmp-4.3.2 --build=x86_64-linux$ make -j4$ make check$ sudo make install$ wget ftp://gcc.gnu.org/pub/gcc/infrastructure/mpc-0.8.1.tar.gz$ tar -zxf mpc-0.8.1.tar.gz$ cd mpc-0.8.1$ ./configure --prefix=/usr/local/gcc/mpc-0.8.1 --with-gmp=/usr/local/gcc/gmp-4.3.2 --with-mpfr=/usr/local/gcc/mpfr-2.4.2 --build=x86_64-linux$ make -j4$ make check$ sudo make install$ wget ftp://gcc.gnu.org/pub/gcc/releases/gcc-4.7.2/gcc-4.7.2.tar.gz$ tar -zxf gcc-4.7.2.tar.gz$ mkdir gcc-build$ cd gcc-build$ ../gcc-4.7.2/configure --prefix=/usr/local/gcc/gcc-4.7.2 --enable-threads=posix --disable-checking --disable-multilib --enable-languages=c,c++ --with-gmp=/usr/local/gcc/gmp-4.3.2 --with-mpfr=/usr/local/gcc/mpfr-2.4.2 --with-mpc=/usr/local/gcc/mpc-0.8.1 --build=x86_64-linux$ export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/gcc/mpc-0.8.1/lib:/usr/local/gcc/gmp-4.3.2/lib:/usr/local/gcc/mpfr-2.4.2/lib$ make -j4$ make check$ sudo make install

修改原来的gcc

# cd /usr/bin# mv gcc gcc447# ln -s /usr/local/gcc/gcc-4.7.2/bin/gcc gcc# ln -s /usr/local/gcc/gcc-4.7.2/bin/g++ g++

修改 /etc/bashrc, 增加：

LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/gcc/mpc-0.8.1/lib:/usr/local/gcc/gmp-4.3.2/lib:/usr/local/gcc/mpfr-2.4.2/lib:/usr/local/gcc/gcc-4.7.2/libexport LD_LIBRARY_PATH

重启系统:

# reboot

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