ubuntu20.04中编译安装gcc 9.2.0

ubuntu20.04中编译安装gcc 9.2.0,步骤如下：

#install compile dependence libraries

1：$ sudo apt install libgmp-dev libisl-dev libmpc-dev libmpfr-dev

# install gcc 9.2.0

# download source code

2：$ wget http://ftp.gnu.org/gnu/gcc/gcc-9.2.0/gcc-9.2.0.tar.xz

# uncompress

3：$ tar -xJvf gcc-9.2.0.tar.xz

4：$ cd gcc-9.2.0

5：$ mkdir build && cd build

# configure

6：$ ../configure -prefix=/usr/local/gcc-9.2 -enable-checking=release -enable-languages=c,c++ --disable-multilib --disable-libsanitizer

PS: 我电脑默认的编译配置是32位和64位，但是32位的dev lib不齐全，最好关掉32位，--disable-multilib

关闭 sanitizer模块，否则编译不过

# compile with multi thread

7：$ make -j4

# install

8：$ sudo make install