每当我尝试在科学linux 6上安装gcc 4.8时，我都会收到以下错误。有谁知道错误的任何修复：
[root@ABC]# yum install libstdc++-devel.i686
Loaded plugins: refresh-packagekit, security
Setting up Install Process
http://people.centos.org/tru/devtools-2/6.6/x86_64/RPMS/repodata/repomd.xml: [Errno 14] PYCURL ERROR 22 - "The requested URL returned error: 404 Not Found"
Trying other mirror.
Error: Cannot retrieve repository metadata (repomd.xml) for repository: testing-devtools-2-centos-6.6. Please verify its path and try again
Loaded plugins: refresh-packagekit, security
http://people.centos.org/tru/devtools-2/6.6/x86_64/RPMS/repodata/repomd.xml: [Errno 14] PYCURL ERROR 22 - "The requested URL returned error: 404 Not Found"
Trying other mirror.
http://people.centos.org/tru/devtools-2/6.6/x86_64/RPMS/repodata/repomd.xml: [Errno 14] PYCURL ERROR 22 - "The requested URL returned error: 404 Not Found"
Trying other mirror.
repo id repo name status
sl Scientific Linux 6.6 - x86_64 6,665
sl-security Scientific Linux 6.6 - x86_64 - security updat 420
sl6x Scientific Linux 6x - x86_64 6,665
sl6x-security Scientific Linux 6x - x86_64 - security update 420
testing-devtools-2-centos-6.6 testing 2 devtools for CentOS 6.6 0
repolist: 14,170
编辑：wget -O /etc/yum.repos.d/slc6-devtoolset.repo http://linuxsoft.cern.ch/cern/devtoolset/slc6-devtoolset.repo 输出：
--2015-04-22 13:05:01-- http://linuxsoft.cern.ch/cern/devtoolset/slc6-devtoolset.repo
Resolving linuxsoft.cern.ch... 2001:1458:201:95::100:13, 2001:1458:201:95::100:14, 2001:1458:201:95::100:d, ...
Connecting to linuxsoft.cern.ch|2001:1458:201:95::100:13|:80... failed: Connection timed out.
Connecting to linuxsoft.cern.ch|2001:1458:201:95::100:14|:80... failed: Connection timed out.
Connecting to linuxsoft.cern.ch|2001:1458:201:95::100:d|:80... failed: Connection timed out.
答案 0 :(得分：1)
在您的主机上安装Devtoolset-repo
wget -O /etc/yum.repos.d/slc6-devtoolset.repo http://linuxsoft.cern.ch/cern/devtoolset/slc6-devtoolset.repo
yum install devtoolset-2 测试已安装的环境
scl enable devtoolset-2 bash
gcc --version