[R-SIG-Mac] Corrupt R installation

[Jeff Newmiller]

Also, symlinking an X.Y R version package library to any other major-minor version is never supported (even if it sometimes works). Re-install your packages when the minor version Y increments.

On June 8, 2021 5:07:28 PM PDT, Simon Urbanek <simon.urbanek using R-project.org> wrote:
>
>You seem to have entirely non-standard setup that you're on your own
>and I assume you're not using CRAN R since you involve homebrew (which
>explains the chaos) so presumably you re-compiled R yourself and all
>packages, but I'd like to point out that if all you are after is OpenMP
>support then you don't need any of that fragile mess as explained at
>https://mac.r-project.org/openmp/
>
>Cheers,
>Simon
>
>
>> On 9/06/2021, at 8:46 AM, moleps islon <moleps2 using gmail.com> wrote:
>> 
>> Copied from SO (
>>
>https://stackoverflow.com/questions/67892321/major-r-installation-corruption)
>> and sent here instead at the suggestion of  Dirk Eddelbuettel
>> <https://stackoverflow.com/users/143305/dirk-eddelbuettel>
>> 
>> I have no idea why, but my R installation (Mac OS X - Big Sur)
>> automatically updates causing havoc with my libraries each time. My
>Mac is
>> under administration from the university and their software center,
>but
>> they claim it is not their fault - but I still suspect them for
>causing all
>> the trouble.
>> 
>> Anyhow - after that last update to 4.1.0 the packages were again all
>lost.
>> I tried a dirty hack just symlinking to the old version and updating
>(I
>> know-- very stupid, but I didnt have time for a major update of all
>the
>> packages), but after this my R-installation has been totally chaos
>for the
>> past week. I´ve reinstalled everything multiple times (brew, llvm,
>gcc,
>> CLI, X-code -- you name it) and I´ve finally managed to get
>data.table
>> working again with openMP support using the instructions at SO
>>
><https://stackoverflow.com/questions/65251887/clang-7-error-linker-command-failed-with-exit-code-1-for-macos-big-sur/65334247#65334247>
>> (
>>
>https://stackoverflow.com/questions/65251887/clang-7-error-linker-command-failed-with-exit-code-1-for-macos-big-sur/65334247#65334247
>> ).
>> 
>> However I still get the following error message when installing
>data.table
>> from source:
>> 
>> dylib (/usr/local/opt/llvm/lib/libunwind.dylib) was built for newer
>macOS
>> version (11.0) than being linked (10.16)
>> Does it matter? Any idea how I can fix it?
>> 
>> 	[[alternative HTML version deleted]]
>> 
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>
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-- 
Sent from my phone. Please excuse my brevity.