gcc安裝步驟

https://gcc.gnu.org/wiki/InstallingGCC

主要安裝命令：

tar xzf gcc-4.6.2.tar.gz
cd gcc-4.6.2
./contrib/download_prerequisites
cd ..
mkdir objdir
cd objdir
$PWD/../gcc-4.6.2/configure --prefix=$HOME/gcc-4.6.2 --enable-languages=c,c++,fortran,go
make
make install