Linux gcc升级

1. 查看当前gcc版本

gcc -v

2. 安装gcc 下载地址

tar -vxf gcc-10.1.0.tar.gz
mkdir build
cd build/
 ../configure --prefix=/usr/local/gcc-10.1.0/ --enable-checking=release --enable-languages=c,c++ --disable-multilib

3. gmp安装(若报错提示缺少该依赖)

tar -vxf gmp-5.0.1.tar.bz2
cd gmp-5.0.1/
./configure --prefix=/usr/local/gmp-5.0.1
make
make install

4. MPFR编译(若报错提示缺少该依赖)

tar -vxf mpfr-3.1.5.tar.xz
cd mpfr-3.1.5/
./configure --prefix=/usr/local/mpfr-3.1.5 --with-gmp=/usr/local/gmp-5.0.1
make
make install

5. MPC编译(若报错提示缺少该依赖)

tar -vxf mpc-1.0.1.tar.gz
cd mpc-1.0.1
./configure --prefix=/usr/local/mpc-1.0.1 --with-gmp=/usr/local/gmp-5.0.1 --with-mpfr=/usr/local/mpfr-3.1.5
make
make install

6. 再次编译GCC(若第一次编译报错，安装依赖之后再次安装)

cd gcc-10.1.0/build/
../configure --prefix=/usr/local/gcc-10.1.0/ --enable-checking=release --enable-languages=c,c++ --disable-multilib --with-gmp=/usr/local/gmp-5.0.1 --with-mpfr=/usr/local/mpfr-3.1.5 --with-mpc=/usr/local/mpc-1.0.1


# make与机器性能有关，可以设置 -j8
make -j4

7. 替换GCC,更新版本

mv /usr/bin/gcc /usr/bin/gcc485
mv /usr/bin/g++ /usr/bin/g++485
mv /usr/bin/c++ /usr/bin/c++485
mv /usr/bin/cc /usr/bin/cc485


ln -s /usr/local/gcc-10.1.0/bin/gcc /usr/bin/gcc
ln -s /usr/local/gcc-10.1.0/bin/g++ /usr/bin/g++
ln -s /usr/local/gcc-10.1.0/bin/c++ /usr/bin/c++
ln -s /usr/local/gcc-10.1.0/bin/gcc /usr/bin/cc


mv /usr/lib64/libstdc++.so.6 /usr/lib64/libstdc++.so.6.bak
ln -s /usr/local/gcc-10.1.0/lib64/libstdc++.so.6.0.28 /usr/lib64/libstdc++.so.6

#确认gcc版本升级成功
gcc -v