Need to update gcc to version >=6 on CentOS 7 ? - Discuss - lists.centos.org
Is there a RPM package for GCC 6.2 for Cent OS 7.2 ? Looks there is only source. I am trying to compile and it is running hours ? any idea - Stack Overflow
installation - How to Install gcc 5.3 with yum on CentOS 7.2? - Stack Overflow
Devtoolset is a game changer for C++ development on Linux
what is devtoolset ?
More on reddit.comI've confirmed that you can upgrade gcc from the default version 4.8 on centOS 7.
First, we need to install "Software Collections" in order to access some of the community packages including gcc v7
sudo yum install -y centos-release-scl
Next, we want to install a developer toolset. Depending on your needs, you may want a different devtoolset. Here I'm targeting 7:
sudo yum install -y devtoolset-7
Finally, you'll want to change over to gcc 7 as your default, launch a new shell session with the scl tool:
scl enable devtoolset-7 bash
Enable the software collection in the answer is only effective in the current shell.
The scl utility will create a "child-shell" that set the PATH variables properly, so that in the new child-shell, the enabled software collections will be firstly searched.
These settings obviously only take effective temporarily in the current shell.
To make it permanently effective, add the command, source /opt/rh/devtoolset-7/enable to the user's profile (~/.bash_profile or ~/.bashrc for RHEL based OS, like CentOS 7).
Then, start a new shell and you will have the right tools available.
After execute
scl enable devtoolset-7 bash, you will need to executeexittwice to exit the opened shell window, which verifies that thesclcommand created a new shell instance as a child process. There might be side-effect with creating a child-shell, so do not put this command in the~/.bashrcprofile, otherwise it will repeatedly create child-shell (non-login shell) as each shell will load the profile, resulting in a endless recursive loop. Put it in~/.bash_profile, it will be loaded for only once (for the login shell), but you will need to exit twice every time.
But for development purpose, scl enable devtoolset-7 bash would be preferred, as you can exit the created child-shell, and then switch between different versions of the same software.
More details about the GCC version in python terminal:
The version info of the built-in Python in CentOS 7:
[root@conda condabuilder]# python Python 2.7.5 (default, Nov 16 2020, 22:23:17) [GCC 4.8.5 20150623 (Red Hat 4.8.5-44)] on linux2 Type "help", "copyright", "credits" or "license" for more information.The version info of the user installed (via
conda) Python on a system even without higher version of GCC installed:[root@conda condabuilder]# conda activate jupyter (jupyter) [root@conda condabuilder]# python -VV Python 3.10.9 | packaged by conda-forge | (main, Feb 2 2023, 20:20:04) [GCC 11.3.0]
From the results, we can see that the GCC version contained in Python's version info is not related to the system's GCC. The system's default Python (2.7.5) should have been compiled with the GCC version distributed with CentOS 7, so the version info show the same GCC version. But for user installed python, the GCC version info actually depends on what version of GCC is used for building and packging the python binary.
Update:
Often people want the most recent version of gcc, and devtoolset is being kept up-to-date, so maybe you want devtoolset-N where N={4,5,6,7...}, check yum for the latest available on your system). Updated the cmds below for N=7.
There is a package for gcc-7.2.1 for devtoolset-7 as an example. First you need to enable the Software Collections, then it's available in devtoolset-7:
sudo yum install centos-release-scl
sudo yum install devtoolset-7-gcc*
scl enable devtoolset-7 bash
which gcc
gcc --version
Update: Installing latest version of gcc 9: (gcc 9.3.0) - released March 12, 2020:
Same method can be applied to gcc 10 (gcc 10.1.0) - released May 7, 2020
Download file: gcc-9.3.0.tar.gz or gcc-10.1.0.tar.gz
Compile and install:
//required libraries: (some may already have been installed)
dnf install libmpc-devel mpfr-devel gmp-devel
//if dnf install libmpc-devel is not working try:
dnf --enablerepo=PowerTools install libmpc-devel
//install zlib
dnf install zlib-devel*
./configure --with-system-zlib --disable-multilib --enable-languages=c,c++
make -j 8 <== this may take around an hour or more to finish
(depending on your cpu speed)
make install
Tested under CentOS 7.8.2003 for gcc 9.3 and gcc 10.1
Tested under CentOS 8.1.1911 for gcc 10.1 (may take more time to compile)
Results: gcc/g++ 9.3.0/10.1.0
Installing gcc 7.4 (gcc 7.4.0) - released December 6, 2018:
Download file: https://ftp.gnu.org/gnu/gcc/gcc-7.4.0/gcc-7.4.0.tar.gz
Compile and install:
//required libraries:
yum install libmpc-devel mpfr-devel gmp-devel
./configure --with-system-zlib --disable-multilib --enable-languages=c,c++
make -j 8 <== this may take around 50 minutes or less to finish with 8 threads
(depending on your cpu speed)
make install
Result:
Notes:
1. This Stack Overflow answer will help to see how to verify the downloaded source file.
2. Use the option --prefix to install gcc to another directory other than the default one. The toplevel installation directory defaults to /usr/local. Read about gcc installation options
Tru Huynh of centos.org 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.
cd /etc/yum.repos.d
wget http://people.centos.org/tru/devtools-1.1/devtools-1.1.repo
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
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++
Here is how to get devtoolset-2 (including gcc 4.8.1)
This was taken from http://people.centos.org/tru/devtools-2/readme
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 devtoolset-2-gcc-c++
Known issues:
- unsigned packages
- CentOS-6 devtoolset-2 needs devtoolset-2-ide which contains the whole Eclipse stack, but does not build yet
- CentOS-6 all the maven related file are not built either
Main changes from devtools-1.1:
/opt/centosis no longer used/opt/rhis now used as upstream (as SL version)