Linux下编译安装gcc

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引言

1、gcc下载地址：ftp://ftp.mirrorservice.org/sites/sourceware.org/pub/gcc/releases
2、GMP、MPFR、MPC下载地址：ftp://gcc.gnu.org/pub/gcc/infrastructure/

步骤

1、安装gcc需要依赖GMP、MPFR、MPC， 而MPFR依赖GMP，而MPC依赖GMP和MPFR，所以要先安装GMP，其次MPFR，最后才是MPC。
2、下载gcc5.5.0、gmp4.3.2、mpfr2.4.2、mpc0.8.1，均放在/usr/local下
3、切换到root用户
4、安装gmp4.3.2

# tar jxvf gmp-4.3.2.tar.bz2
# cd gmp-4.3.2
# ./configure --prefix=/usr/local/gmp-4.3.2
# make
# make install

5、安装mpfr2.4.2

# tar jxvf mpfr-2.4.2.tar.bz2
# cd mpfr-2.4.2
# ./configure --prefix=/usr/local/mpfr-2.4.2 --with-gmp=/usr/local/gmp-4.3.2 
# make
# make install

6、安装mpc0.8.1

# tar -zxf mpc-0.8.1.tar.gz	
# cd mpc-0.8.1
# ./configure --prefix=/usr/local/mpc-0.8.1 --with-gmp=/usr/local/gmp-4.3.2 --with-mpfr=/usr/local/mpfr-2.4.2
# make
# make install

7、添加环境变量

export LD_LIBRARY_PATH="/usr/local/mpc-0.8.1/lib:/usr/local/gmp-4.3.2/lib:/usr/local/mpfr-2.4.2/lib:$LD_LIBRARY_PATH"

8、安装gcc

# tar -zxf gcc-5.5.0.tar.gz
# cd gcc-5.5.0
# ./configure --prefix=/usr/local/gcc-5.5.0 -enable-threads=posix -disable-checking -disable-multilib -enable-languages=c,c++ --with-gmp=/usr/local/gmp-4.3.2 --with-mpfr=/usr/local/mpfr-2.4.2 --with-mpc=/usr/local/mpc-0.8.1
# make -j 4
# make install

9、添加gcc到环境变量

export LD_LIBRARY_PATH="/usr/local/mpc-0.8.1/lib:/usr/local/gmp-4.3.2/lib:/usr/local/mpfr-2.4.2/lib:/usr/local/gcc-5.5.0/lib64:$LD_LIBRARY_PATH"