[R-pkg-devel] MacOS CMAKE_OSX_ARCHITECTURES

[Florian Schwendinger]

Dear package developers,

I currently try to debug a few issues which occur on MacOS
r-release-macos-arm64 and r-oldrel-macos-arm64.

To the setting I wrote an interface to mixed integer linear optimization
solver highs. Thereby I use the configure script + a bash file called
from configure to build a static library to which I link afterwards.

For MacOS M1 this was a little bit tricky since I needed to add the
CMAKE_OSX_ARCHITECTURES flag to get it to work (I have no direct access to MacOS M1).
What I currently doing for MacOS-M1 is
${CMAKE_EXE} \
-DCMAKE_INSTALL_PREFIX=${R_HIGHS_LIB_DIR} \
-DCMAKE_OSX_ARCHITECTURES="x86_64;arm64" ..

As far as I understand from the cmake release page
https://cmake.org/cmake/help/latest/release/3.19.html#id13
which states
"The precompiled macOS binary provided on cmake.org is now a universal
binary with x86_64 and arm64 architectures."
for this to work I need at least cmake version "3.19.2"?
Is this correct?
Is there a better way / another option?


I used for MacOS-M1 the minimum cmake version "3.20" since
this is the version I could test with a testing service.
Now seeing the error messages on
"r-release-macos-arm64" and "r-oldrel-macos-arm64"
I see these two setups use cmake "3.19.4" which means
I should have stuck to "3.19.2" if my assumption above is
correct. Is it possible to see beforehand what the highest
possible cmake version for CRAN is?

Best regards,
Florian