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How do I change the default gcc compiler in Centos?
Here is the recipe:
- check your if you shell is bash, if not set it to bash: $ echo $SHELL. /bin/tcsh.
- Switch to bash: $ bash.
- Add new version of GCC to the front of the PATH:
- Check the PATH: bash-4.1$ echo $PATH.
- Check version of GCC used (It picks up the first GCC from the PATH): bash-4.1$ gcc –version.
Does Linux have gcc by default?
“Linux” doesn’t have gcc installed in advance. gcc is part of certain installation configurations of certain distributions. But if you don’t need those then your installation should work without gcc .
How to switch to default gcc after switched to a?
I want to install several gcc with different versions in centos. The default version of gcc in centos 6 is 4.9.3. So I use devtoolset install a higher version of gcc. Then I switch to the higher version of gcc by executing “source /opt/rh/devtoolset-5/enable”.
How to change the default gcc compiler in Ubuntu?
With that, llvm-config (version 3.7) appears with its plain name in your PATH. No need to muck around with symlinks, nor to call the llvm-config-3.7 that got installed in /usr/bin. Also, check for a package named llvm-defaults (or gcc-defaults), which might offer other way to do this (I didn’t use it).
How to install as many versions of GCC as you need?
You can install as many versions of gcc either by installing devtoolset-# via yum or by compiling then from source. The first way is the easiest. Make sure that you are installing the devtoolset packages via the scl repo.
Why are there ABI changes between GCC versions?
There are ABI changes between gcc versions. Compiling something with one version (eg the entire operating system) and then compiling something else with another version, can cause conflict. For example, kernel modules should always be compiled with the same version of gcc used to compile the kernel.