How to select version in /opt/intel/oneapi/setvars.sh

[caplanr]

Hi,

I have two versions of the oneapi-hpc toolkits installed on my machine (the latest one and an older one for compatibility issues).

Is there a way to specify which version to load into my environment when I source `/opt/intel/oneapi/setvars.sh`?

Thanks

 -  Ron

[Steve_Lionel]

You would need to select the desired one from its installation folder.

[caplanr]

How?

I usually just source the script with:
`. /opt/intel/oneapi/setvars.sh`

How do I select the one I want?  

Is there optional arguments to the script?

 - Ron

[MarcGrodent · Accepted solution]

Yo can you the "--config=file" option to specify the compiler you want to use.

For instance, let's say there are two versions of the compiler installed on your machine:

    - /opt/intel/oneapi/compiler/2024.0

    - /opt/intel/oneapi/compiler/2025.3.2

By default, running "setvars.sh" will select the latest version installed (2025.3.2).

Now, you can create a configuration file, say ~/config_intel_compiler

In this file, add the following line:

  compiler=2024.0

Finally, run the script with the following command:

  source /opt/intel/oneapi/setvars.sh --config="~/config_intel_compiler"

And finally check your current compiler version:

  which ifx

You should see that the old version is active.

[MarcGrodent]

In addition to my reply, you can force setvars to re-run if the Intel environment has already been configured. For instance:

  source /opt/intel/oneapi/setvars.sh --force --config="$HOME/config_intel_compiler"

Then check with:

   which ifx

or

   ifx --version

[caplanr]

Hi,

Thanks for the help, but I can't seem to get it to work.

I have:

# ls /opt/intel/oneapi/compiler/ -la
total 16
drwxr-xr-x 4 root root 4096 Feb 5 11:46 .
drwxr-xr-x 27 root root 4096 Jan 29 15:31 ..
drwxr-xr-x 10 root root 4096 Nov 7 14:07 2025.2
drwxr-xr-x 10 root root 4096 Feb 5 11:45 2025.3
lrwxrwxrwx 1 root root 6 Feb 5 11:46 latest -> 2025.3

So I have both 2025.3 and 2025.2

I made a config file that looks like:

$ cat ~/config_intel_compiler_2502
compiler=2025.2

I then source with:

$ . /opt/intel/oneapi/setvars.sh --config="~/config_intel_compiler_2502"

But I am still on the newest compiler:

$ ifx -v
ifx version 2025.3.2

Am I missing something?

 - Ron

[MarcGrodent]

This is strange, it works perfectly on my Ubuntu machine.

Is "setvars.sh" executed automatically when you log in (by means of a similar command in file ~/.bashrc for instance)? If this is the case, your command with the "--config" option is skipped. Can you try forcing the execution of the bash script?

$ . /opt/intel/oneapi/setvars.sh --force --config="~/config_intel_compiler_2502"

[caplanr]

Hi,

It works now.

I have a system "load" script and I had copied it to my home dir but forgot to use "./" when sourcing the local one.

Thanks! 

Problem solved!