Issue 683: change tests to macos 15

[jkotan]

It resolves #683 by changing tests to macos 15

[ggoneiESS]

It's good you are on top of this! If we are not going to keep previous OSes, then I have edited the README to reflect this.

[ggoneiESS]

Looking at .github/workflows I think it might make more sense to just drop the apple-clang version from the name and instead update that file, rather than continuously updating the cmake-build and adding new profiles. We also should remove the apple-clang12 since it's not used anywhere.

If we instead keep the version like apple-clang15 then we should also keep the corresponding cmake profiles rather than rewriting.

I'd be happy to approve either version with those changes (adjusting the README appropriately)

[jkotan]

Looking at .github/workflows I think it might make more sense to just drop the apple-clang version from the name and instead update that file, rather than continuously updating the cmake-build and adding new profiles. We also should remove the apple-clang12 since it's not used anywhere.

If we instead keep the version like apple-clang15 then we should also keep the corresponding cmake profiles rather than rewriting.

I'd be happy to approve either version with those changes (adjusting the README appropriately)

Hello @ggoneiESS ,
I've just removed apple-clang12. I'm not sure if I understand correctly what is cmake profile. We currently use conan with its profile where clang version is defined.

[jkotan]

shall we use clang17 ?

[ggoneiESS]

It's just the build instructions given so compilation can be done against a given OS environment easily through Conan. In theory we could just add new ones and never remove the old ones...but of course that means supporting old systems for much longer.

For the other question: I would stick with clang-15 since that still works with apple-15 and it's the highest version available to Ubuntu 22.04 without messing about with package managers: https://documentation.ubuntu.com/ubuntu-for-developers/reference/availability/llvm/

[jkotan]

It's just the build instructions given so compilation can be done against a given OS environment easily through Conan. In theory we could just add new ones and never remove the old ones...but of course that means supporting old systems for much longer.

The conan profile to my understanding allows us so select particular compiler which is used and installed or use e.g. two different once by creating matrix. So you would like to remove a selection of compiler which is used on macos?

[ggoneiESS]

I think it's more making a choice between either:

• keep all options in the cmake-build.yml, and add new ones as needed (e.g. the new macos 15 build instructions)
• keep only the latest one or two options in cmake-build.yml for Apple, Microsoft, Linux builds, but clean up the conan/profiles folder (=> here we remove apple-clang12)

The latter choice makes life easier in the long run