Linux: How to upgrade GCC


To view your current version of GCC, you can use the command:

yum info gcc

gcc info
Result

[root@tutorialspots.com ~]# yum info gcc
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * base: centos.mirror.lstn.net
 * epel: fedora-epel.mirror.lstn.net
 * extras: yum.tamu.edu
 * updates: pubmirrors.dal.corespace.com
Installed Packages
Name        : gcc
Arch        : x86_64
Version     : 4.4.7
Release     : 16.el6
Size        : 19 M
Repo        : installed
From repo   : base
Summary     : Various compilers (C, C++, Objective-C, Java, ...)
URL         : http://gcc.gnu.org
License     : GPLv3+ and GPLv3+ with exceptions and GPLv2+ with exceptions
Description : The gcc package contains the GNU Compiler Collection version 4.4.
            : You'll need this package in order to compile C code.

or use the command

gcc --version

Result:

[root@tutorialspots.com ~]# gcc --version
gcc (GCC) 4.4.7 20120313 (Red Hat 4.4.7-16)
Copyright (C) 2010 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

[root@downappz ~]# cat /etc/*release*
CentOS release 6.5 (Final)
CentOS release 6.5 (Final)
CentOS release 6.5 (Final)
cpe:/o:centos:linux:6:GA

You try to upgrade GCC but unsuccessfully.

[root@tutorialspots.com ~]# yum upgrade gcc
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * base: centos.mirror.lstn.net
 * epel: fedora-epel.mirror.lstn.net
 * extras: yum.tamu.edu
 * updates: pubmirrors.dal.corespace.com
Setting up Upgrade Process
No Packages marked for Update

How to upgrade GCC on Linux?

Method 1: Install redhat developer toolset 1.1

Step 1: Download file devtools-1.1.repo to your server.

wget http://people.centos.org/tru/devtools-1.1/devtools-1.1.repo -O /etc/yum.repos.d/devtools-1.1.repo

Result:

[root@downappz ~]# wget http://people.centos.org/tru/devtools-1.1/devtools-1.1.r
epo -O /etc/yum.repos.d/devtools-1.1.repo
--2015-09-23 09:01:56--  http://people.centos.org/tru/devtools-1.1/devtools-1.1.
repo
Resolving people.centos.org... 204.15.73.242
Connecting to people.centos.org|204.15.73.242|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 174 1
Saving to: `/etc/yum.repos.d/devtools-1.1.repo'

100%[======================================>] 174         --.-K/s   in 0s

2015-09-23 09:01:56 (18.0 MB/s) - `/etc/yum.repos.d/devtools-1.1.repo' saved [17
4/174]

Step 2: use yum to install redhat developer toolset 1.1

yum --enablerepo=testing-1.1-devtools-6 install devtoolset-1.1-gcc devtoolset-1.1-gcc-c++
[root@tutorialspots.com ~]# yum --enablerepo=testing-1.1-devtools-6 install devtoolset-1.
1-gcc devtoolset-1.1-gcc-c++
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * base: centos.mirror.lstn.net
 * epel: fedora-epel.mirror.lstn.net
 * extras: yum.tamu.edu
 * updates: pubmirrors.dal.corespace.com
testing-1.1-devtools-6                                   |  951 B     00:00
testing-1.1-devtools-6/primary                           |  13 kB     00:00
testing-1.1-devtools-6                                                    42/42
Setting up Install Process
Resolving Dependencies
--> Running transaction check
---> Package devtoolset-1.1-gcc.x86_64 0:4.7.2-5.el6 will be installed
--> Processing Dependency: devtoolset-1.1-runtime for package: devtoolset-1.1-gc
c-4.7.2-5.el6.x86_64
---> Package devtoolset-1.1-gcc-c++.x86_64 0:4.7.2-5.el6 will be installed
--> Processing Dependency: devtoolset-1.1-libstdc++-devel = 4.7.2-5.el6 for pack
age: devtoolset-1.1-gcc-c++-4.7.2-5.el6.x86_64
--> Running transaction check
---> Package devtoolset-1.1-libstdc++-devel.x86_64 0:4.7.2-5.el6 will be install
ed
base/filelists_db                                        | 6.3 MB     00:00
http://fedora-epel.mirror.lstn.net/6/x86_64/repodata/4264baf3a86a37d82110fd30ec9
43ab2c028640b443a00359a9f56c31424c37e-filelists.sqlite.bz2: [Errno 14] PYCURL ER
ROR 22 - "The requested URL returned error: 404 Not Found"
Trying other mirror.
epel/filelists_db                                        | 8.2 MB     00:00
extras/filelists_db                                      |  36 kB     00:00
nginx/filelists_db                                       | 4.7 kB     00:00
testing-1.1-devtools-6/filelists                         | 109 kB     00:00
updates/filelists_db                                     | 1.6 MB     00:00
vesta/filelists_db                                       |  48 kB     00:00
vz-base/filelists                                        |  824 B     00:00
vz-updates/filelists                                     | 3.0 kB     00:00
---> Package devtoolset-1.1-runtime.noarch 0:1-13.el6 will be installed
--> Processing Dependency: scl-utils for package: devtoolset-1.1-runtime-1-13.el
6.noarch
--> Running transaction check
---> Package scl-utils.x86_64 0:20120927-27.el6_6 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

================================================================================
 Package                  Arch   Version           Repository              Size
================================================================================
Installing:
 devtoolset-1.1-gcc       x86_64 4.7.2-5.el6       testing-1.1-devtools-6  19 M
 devtoolset-1.1-gcc-c++   x86_64 4.7.2-5.el6       testing-1.1-devtools-6 6.1 M
Installing for dependencies:
 devtoolset-1.1-libstdc++-devel
                          x86_64 4.7.2-5.el6       testing-1.1-devtools-6 1.8 M
 devtoolset-1.1-runtime   noarch 1-13.el6          testing-1.1-devtools-6 1.0 M
 scl-utils                x86_64 20120927-27.el6_6 base                    22 k

Transaction Summary
================================================================================
Install       5 Package(s)

Total download size: 28 M
Installed size: 62 M
Is this ok [y/N]: y
Downloading Packages:
(1/5): devtoolset-1.1-gcc-4.7.2-5.el6.x86_64.rpm         |  19 MB     00:02
(2/5): devtoolset-1.1-gcc-c++-4.7.2-5.el6.x86_64.rpm     | 6.1 MB     00:00
(3/5): devtoolset-1.1-libstdc++-devel-4.7.2-5.el6.x86_64 | 1.8 MB     00:00
(4/5): devtoolset-1.1-runtime-1-13.el6.noarch.rpm        | 1.0 MB     00:00
(5/5): scl-utils-20120927-27.el6_6.x86_64.rpm            |  22 kB     00:00
--------------------------------------------------------------------------------
Total                                           6.4 MB/s |  28 MB     00:04
Running rpm_check_debug
Running Transaction Test
Transaction Test Succeeded
Running Transaction
  Installing : scl-utils-20120927-27.el6_6.x86_64                           1/5
  Installing : devtoolset-1.1-runtime-1-13.el6.noarch                       2/5
  Installing : devtoolset-1.1-gcc-4.7.2-5.el6.x86_64                        3/5
  Installing : devtoolset-1.1-libstdc++-devel-4.7.2-5.el6.x86_64            4/5
  Installing : devtoolset-1.1-gcc-c++-4.7.2-5.el6.x86_64                    5/5
  Verifying  : devtoolset-1.1-gcc-4.7.2-5.el6.x86_64                        1/5
  Verifying  : devtoolset-1.1-libstdc++-devel-4.7.2-5.el6.x86_64            2/5
  Verifying  : scl-utils-20120927-27.el6_6.x86_64                           3/5
  Verifying  : devtoolset-1.1-runtime-1-13.el6.noarch                       4/5
  Verifying  : devtoolset-1.1-gcc-c++-4.7.2-5.el6.x86_64                    5/5

Installed:
  devtoolset-1.1-gcc.x86_64 0:4.7.2-5.el6
  devtoolset-1.1-gcc-c++.x86_64 0:4.7.2-5.el6

Dependency Installed:
  devtoolset-1.1-libstdc++-devel.x86_64 0:4.7.2-5.el6
  devtoolset-1.1-runtime.noarch 0:1-13.el6
  scl-utils.x86_64 0:20120927-27.el6_6

Complete!

You can find GCC in directory /opt/centos/devtoolset-1.1/root/usr/bin.
gcc devtoolset 1.1

Step 3: create backup of GCC

mv /usr/bin/gcc /usr/bin/gcc.bckup

Step 4: create symbolic link from /opt/centos/devtoolset-1.1/root/usr/bin/gcc to /usr/bin/gcc

ln -s /opt/centos/devtoolset-1.1/root/usr/bin/gcc /usr/bin/gcc

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