在Ubuntu上安装新版GCC报错

Question

checking host system type... Invalid configuration `i386-redhat-linux--with-system-zlib': machine `i386-redhat-linux--with-system' not recognized
configure: error: /bin/sh ../root/gcc-4.9.1/config.sub i386-redhat-linux--with-system-zlib failed

Answer 1

jxust@jxust-VirtualBox:~$ cd gcc-build
jxust@jxust-VirtualBox:~/gcc-build$ su
密码：
masu：认证失败
jxust@jxust-VirtualBox:~/gcc-build$ make install
make[1]: 进入目录 `/home/jxust/gcc-build'
/bin/bash ../gcc-4.6.1/mkinstalldirs /usr/local/gcc-4.6.1 /usr/local/gcc-4.6.1
mkdir -p -- /usr/local/gcc-4.6.1 /usr/local/gcc-4.6.1
mkdir: 创建目录 /usr/local/gcc-4.6.1: 权限够
mkdir: 创建目录 /usr/local/gcc-4.6.1: 权限够
make[1]: *** [installdirs] 错误 1
make[1]:离目录 `/home/jxust/gcc-build'
make: *** [install] 错误 2