Hello,

I used:
yum -y --nogpgcheck install devtoolset-3-gcc devtoolset-3-gcc-c++

to upgrade gcc and g++ from 4.4.7 to 4.8+

it installed :
devtoolset-3-gcc-4.9.1-10.el6.i686
devtoolset-3-gcc-c++-4.9.1-10.el6.i686

, but when I tried gcc -v
I received my previous version:

gcc version 4.4.7 20120313 (Red Hat 4.4.7-16) (GCC)

//

when I tried to install gcc-4.8.0 , from source code I received error:

configure: error: Building GCC requires GMP 4.2+, MPFR 2.4.0+ and MPC 0.8.0+.

, but I checked that I have all requires installed.

Please help how to upgrade.

check https://www.softwarecollections.org/.../devtoolset-3/ under "Instructions"

@honza777 : Welcome to LQ.

! It's dangerous to use "yum -y install" in general.

Getting gcc-4.8 / g++-4.8 : http://linux.web.cern.ch/linux/devtoolset/
>> http://linux.web.cern.ch/linux/devtoolset/#dts2
# wget -O /etc/yum.repos.d/slc6-devtoolset.repo http://linuxsoft.cern.ch/cern/devtoo...evtoolset.repo
( http://linuxsoft.cern.ch/cern/devtoo...evtoolset.repo )
Package list http://linuxsoft.cern.ch/cern/devtoo...c6X/i386/RPMS/


-

It was helping:[root@centos66a Stazene]# scl enable devtoolset-3 bash

gcc version 4.9.1 20140922 (Red Hat 4.9.1-10) (GCC)

Thanks