How to install GCC 4.7 on the CentOS 6

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Wohlstand M
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Wohlstand M
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Post #1by Wohlstand » 14 Sep 2014, 13:37

Tru Huynh of has built the redhat developer toolset 1.1, for centos and it contains gcc 4.7.2

So you could simply use his repo and install just gcc, instantly.

Code: Select all

cd /etc/yum.repos.d
yum --enablerepo=testing-1.1-devtools-6 install devtoolset-1.1-gcc devtoolset-1.1-gcc-c++

This will install it most likely into /opt/centos/devtoolset-1.1/root/usr/bin/
Then you can tell your compile process to use the gcc 4.7 instead of 4.4 with the CC variable

Code: Select all

export CC=/opt/centos/devtoolset-1.1/root/usr/bin/gcc 
export CPP=/opt/centos/devtoolset-1.1/root/usr/bin/cpp
export CXX=/opt/centos/devtoolset-1.1/root/usr/bin/c++

And last thing:
Replace your installed gcc to your symlinks, and you will have the gcc 4.7 to allow of C++11 standard ;-)

Code: Select all

mv /usr/bin/gcc /usr/bin/gcc_old
mv /usr/bin/cpp /usr/bin/cpp_old
mv /usr/bin/c++ /usr/bin/c++_old
mv /usr/bin/g++ /usr/bin/g++_old
ln -s /opt/centos/devtoolset-1.1/root/usr/bin/gcc /usr/bin/gcc
ln -s /opt/centos/devtoolset-1.1/root/usr/bin/cpp /usr/bin/cpp
ln -s /opt/centos/devtoolset-1.1/root/usr/bin/c++ /usr/bin/c++
ln -s /opt/centos/devtoolset-1.1/root/usr/bin/g++ /usr/bin/g++

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