Detailed explanation of the steps to upgrade gcc using yum on CentOS6.5

Because we need to use C 11, but the gcc4.4.7 that comes with CentOS does not support it, we decided to upgrade gcc.

The operation is as follows:

#Backup

mv /etc/yum.repos.d/devtools-2.repo /etc/yum.repos.d/devtools-2.repo.bak wget http://people.centos.org/tru/devtools-2 /devtools-2.repo -O /etc/yum.repos.d/devtools-2.repo

yum install devtoolset-2-gcc devtoolset-2-binutils

yum install devtoolset-2-gcc-c

These three files will be downloaded to: /opt/rh/devtoolset-2/root/, and then set the soft link:

#Back up the original 4.4.7 version

mv /usr/bin/gcc /usr/bin/gcc-4.4.7

mv /usr/bin/g /usr/bin/g -4.4.7

mv /usr/bin/c /usr/bin/c -4.4.7

#Set soft link

ln -s /opt/rh/devtoolset-2/root/usr/bin/gcc /usr/bin/gcc

ln -s /opt/rh/devtoolset-2/root/usr/bin/c /usr/bin/c

ln -s /opt/rh/devtoolset-2/root/usr/bin/g /usr/bin/g

gcc -v

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