Is it possible to install gcc13 ?

[pstickar]

Hello,

Motivation: My system works correctly with gcc14. But I want to play around with SYCL (https://link.springer.com/book/10.1007/978-1-4842-9691-2) using Intel software (https://www.intel.com/content/www/us/en/developer/tools/oneapi/dpc-compiler.html#gs.kbdt89). However, the most basic examples do not compile. Checking differences, it looks like gcc14 is the problem. It looks like gcc13 would be fine.

Hence my question. Is it possible to install gcc13 side by side with gcc14? I understand that all include files and libraries would be duplicated.

Thanks in advance!

Regards,
Pablo

[NeddySeagoon]

pstickar,

gcc:11 to gcc:14 are all stable in ::gentoo

emerge sys-devel/gcc:13 will install gcc in slot 13, which is what you want. Add --oneshot to avoid it being added to your world file.
Now use gcc-config to select gcc:13
_________________
Regards,

NeddySeagoon

Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail.

[pstickar]

Thank you, that worked.
I could not bring SYCL to work, though.

[logrusx]

GCC 14 introduced stricter language standards and enabled them by default. There are switches to turn the old behavior on. Maybe if you start searching for the errors you would learn something in addition.

Otherwise nothing stops you from having multiple gcc versions installed next to each other. You just need to explicitly invoke the desired version. But don't change the system wide default version, I don't think that's a good idea.

Best Regards,
Georgi

[sam_]

Do consider starting a (new?) thread about your SYCL issues.

[GDH-gentoo]

Why don't you show us (perhaps change the thread's title or start a new one?) the smallest example program that doesn't build and tell us how you are trying to build it, and how does it fail?

GCC can't accept SYCL programs directly, you need special tools to build them. Like Intel's oneAPI DPC++/C++ compiler from your link. Which might or might not call GCC behind the scenes; I'm not familiar with these tools.
_________________

[pstickar]

I summarized my attempts with SYCL in a new thread (https://forums.gentoo.org/viewtopic-p-8854599.html#8854599).
Thank you for the encouragement to post it.
_________________
p.