[R-SIG-Mac] Installing gfortran

[Patrick Schratz]

FWIW blog posts which explain such things usually have a (good) reason - they aim to help people getting started when the official documentation is either unclear, hard to find or incomplete.
It’s on the readers themselves to decide whether such blog posts are trustworthy or useful.

I have personally profited so often from blog posts of others already and therefore find the general advice to not consult such resources quite shortsighted.
Of course the official documentation should always be the first point to have a look at - and in this case the required information would have been there.

Apologies for going partly off-topic but I think this point is important.

Cheers
Patrick

On 23 Apr 2022, at 2:13, Simon Urbanek wrote:

> For posterity - please always consult
>
> https://mac.r-project.org/tools/ (linked from CRAN)
>
> The old locations like libs* are no longer updated and have been deprecated in favor of /tools and /bin which are maintained for all builds. Similarly, I would strongly discourage following any advice from blogs as they tend to be outdated, wrong or both.
>
> Cheers
> Simon
>
>
>> On Apr 23, 2022, at 10:48 AM, Göran Broström <goran.brostrom using umu.se> wrote:
>>
>> Hi Patrick,
>>
>> Den 2022-04-22 kl. 22:54, skrev Patrick Schratz:
>>> Hi Göran
>>> |curl -O https://mac.r-project.org/libs-arm64/gfortran-f51f1da0-darwin20.0-arm64.tar.gz sudo tar fvxz gfortran-f51f1da0-darwin20.0-arm64.tar.gz -C / |
>>> should do it.
>>
>> It did. Thanks!
>>
>> Göran
>>
>>> See also https://pat-s.me/transitioning-from-x86-to-arm64-on-macos-experiences-of-an-r-user/#gfortran <https://pat-s.me/transitioning-from-x86-to-arm64-on-macos-experiences-of-an-r-user/#gfortran> or https://cynkra.com/blog/2021-03-16-gfortran-macos/ <https://cynkra.com/blog/2021-03-16-gfortran-macos/> for more information.
>>> Cheers
>>> Patrick
>>> On 22 Apr 2022, at 22:01, Göran Broström wrote:
>>>    Trying gfortran-f51f1da0-darwin20.0-arm64.tar.gz from
>>> https://mac.r-project.org/libs-arm64/
>>>    <https://mac.r-project.org/libs-arm64/> (following instructions),
>>>    download and unpack,
>>>    but no sight of gfortran in /opt/R/arm64/bin
>>>    so the building of my package fails.
>>>    clang -arch arm64
>>>    -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG
>>>    -I/opt/R/arm64/include -fPIC -falign-functions=64 -Wall -g -O2 -c
>>>    c2f.c -o c2f.o
>>>    /opt/R/arm64/bin/gfortran -mtune=native -fno-optimize-sibling-calls
>>>    -fPIC -Wall -g -O2 -c chek.f -o chek.o
>>>    make: /opt/R/arm64/bin/gfortran: No such file or directory
>>>    make: *** [chek.o] Error 1
>>>    Of course, there is a warning on that web page (so why the link to
>>>    it?) saying that
>>>    IMPORTANT: All binaries are moving to a unified repository under
>>>    /bin/darwin<ver>/<arch> with manifest file to simplify automated
>>>    installataion. Go to /bin/darwin20/arm64 for latest Big Sur arm64
>>>    binaries. The following is only kept for legacy access.
>>>    but there I cannot identify (by name) any file that could contain a
>>>    fortran compiler.
>>>    To summarize: I need help.
>>>    Thanks, Göran
>>>    _______________________________________________
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>>>
>>
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