GCC5.40.0 configure: error: Building GCC requires GMP 4.2+, MPFR 2.4.0+ and MPC 0.8.0+.
错误发生情景： 在安装gcc时，执行.configure命令，报以下错误：...省略configure: error: Building GCC requires GMP 4.2+, MPFR 2.4.0+ and MPC 0.8.0+.Try the --with-gmp, --with-mpfr and/or --with-mpc options to specifytheir locations. Source code for these libraries can be fo
