Date: Sun, 14 Dec 2025 11:39:16 +1300
From: Simon Urbanek<[email protected]>
On 14/12/2025, at 11:24 AM, Jeroen Ooms<[email protected]> wrote:
On Fri, Dec 12, 2025 at 3:20 AM Simon Urbanek
<[email protected]> wrote:
The goal is to remove the existing big-sur-arm64 R-devel binaries in favor of
the sonoma-arm64 R-devel build. Since we are still far away from the R-devel
release, all this is considered experimental and may change in the future
(possibly Fortran upgrade is in the cards), but given that this is not a minor
change, I want to give others the opportunity to test the new setup and comment
as appropriate.
Thanks. Some quick observations:
The x86_64 build of r-devel onhttps://mac.r-project.org/ is almost 2 months old?
Should be fixed now.
On arm64, using the latest R-devel-arm64.pkg on a machine with macOS 15 and
Xcode_16.2, I get the following error for all packages with compiled C code:
error: invalid value 'gnu23' in '-std=gnu23'
note: use 'c2x' for 'Working Draft for ISO C2x' standard
note: use 'gnu2x' for 'Working Draft for ISO C2x with GNU extensions' standard
That is expected, you'll need at least Xcode 16.3 since 16.2 is LLVM 17 while
16.3 is LLVM 19 which, as has been discussed at length, was a big breaking
jump. As noted, what is actually used is Xcode 26.x so that would be
recommended (albeit not required).
It does raise an interesting point, though: macOS 15 is not an issue since you
can install all the way to Xcode 26.3 without problems, but macOS 14 (which is
our designed target) only runs Xcode 16.2. However, the whole point of moving
the target forward was that we upgrade from Xcode 16.2 since that's what we
used for the Big Sur build, so sticking with it would defeat the whole purpose.
So, would anyone be unhappy if we simply declared macOS 14 as the run-time
target, but development needs macOS 15 for the compiler support? It's not
ideal, but the only other way would be to deliberately disable C23 support -
it's doable, though.
I am still running macOS 14 with Xcode 16.2, so I will be unhappy for the time
it takes to upgrade - not only macOS but also whatever I have installed under
/usr/local. I delayed so long because Xcode 16.3 broke so much ...
But I really ought to start testing with the newer toolchains, so I will just
upgrade and be done with it.
Mikael
Cheers,
Simon
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