update fedora

[jeroen]

Fedora 22 is super old and deprecated. 24 is stable now.

[gaborcsardi]

Good point, thanks!

Hmmm. I am not sure about latest, though. Ideally we would use the same version as CRAN, i.e. https://cran.r-project.org/web/checks/check_flavors.html
But then I won't notice when they update and end up with an older version, like now.... so yes, we can go with latest.

I'll push a new Docker build for the builders and make sure it works. And I'll also need to update the metadata for the platforms. We really should have this in a central DB.....

[gaborcsardi]

It will take a bit longer, sorry. I'll try to add it soon. But maybe the builds will just work by themselves.

[jeroen]

No rush, just noticed it when check a pkg and thought it should be fixed.

[gaborcsardi]

I am having a hard time installing clang 3.9.0 on Fedora 24. Do you know a place where it is available? I don't really want to build it....

[jeroen]

Why not just use stock clang 3.8.0 ?

[gaborcsardi]

BEcause CRAN has 3.9.0, so that would be optimal....

[gaborcsardi]

Looks like I can easily have clang 3.9.0 on Fedora 23 or clang 3.8.0 on Fedora 24. Hmmmm.

[jeroen]

CRAN has custom builds of everything, but I think it's fine to stick with stock compilers here. clang 3.9.0 will probably soon be available on Fedora 25...

[gaborcsardi]

OK, let me try a bit harder before I give up....

[jeroen]

OK, but don't waste too much valuable time on trying to keep up with whatever cran comes up with :) I think if we can build with stock R/compilers on current Fedora/Debian/CentOS, that covers like 98% of the use cases.

[jeroen]

But if you really want, note that more important than clang/gcc is which c++ lib is used. Clang can either use gnu libstdc++ (default on fedora) or libcxx (part of llvm) which is a huge difference.

If you use libcxx note that this can result in linking problems to system c++ libraries that were compiled with gcc (libv8, libmagick++, etc).

We had a long discussion about it with Kurt and JJ and it's very complex. See also:

https://bugzilla.redhat.com/show_bug.cgi?id=1332306
https://bugzilla.redhat.com/show_bug.cgi?id=1332307

[gaborcsardi]

I see. Thanks!

I am not sure what CRAN is using, actually: http://www.stats.ox.ac.uk/pub/bdr/Rconfig/r-devel-linux-x86_64-fedora-clang

What is libc++ here?

[jeroen]

libc++ means llvm's libcxx. That means you need to recompile every C++ library on the system with libc++ (which BDR does).

[jeroen]

I'm fowarding you an email from Kurt which I think is still current.

[gaborcsardi]

OMG. OK, I guess I won't do this.

[gaborcsardi]

OK, finally this is deployed. I had to fix the locales, which are apparently messed up in the fedora:latest docker image.