[Rcpp-devel] Troubleshooting dependency issues

[Naeem Khoshnevis]

Hi Dirk,

Thank you so much for your response. Rcpp is excellent, and I am using it
(with OpenMP), and it significantly improved the package (Thank you!). I
have tried it on macOS and centos. I was trying to set up a conda
environment. There are many HPC clusters that are using old versions of R
as well as rstudio. In the past, using conda env helped me to install an
updated version of R., But I understand why you do not recommend it. I will
prepare a reproducible example and will let you know. Thank you so much.

Best regards,
Naeem

On Wed, Jul 14, 2021 at 9:55 AM Dirk Eddelbuettel <edd at debian.org> wrote:

>
> Hi Naeem,
>
> On 14 July 2021 at 09:41, Naeem Khoshnevis wrote:
> | Hi,
> |
> | I hope this email finds you well.
> | I wondered what the best approaches to troubleshooting C++ dependencies
> | issues in general and specifically in R are; specifically, those packages
> | which are using OpenMP and we want to install on macOS.
>
> Is this dependencies (plural) or a single core dependency (singular) on a
> single OS (macOS) ?  Those are different issues. (And Rcpp has no incluence
> over what Cupertino (macOS) or Auckland (macOS deployment for R does) -- we
> have to play the card we are dealt, and that have always been "issues" and
> some HOWTOs and duct tape.  On the margin, if this is your question, it may
> also be one for r-sig-mac.
>
> Also, and to make this concrete: Do you have a minimally reproducible
> issue?
>
> | So far, I am just googling the error and finding out what the problem is.
> | However, it is hard to address issues and come up with long-term
> solutions
> | without internalizing the concepts.
> | One example is creating a conda environment for each R package project
> and
> | installing llvm, clang, etc into each environment.
>
> As an R developer, I have a simple rule: Just say No to conda. Mixing and
> matching between standard / core builds (using the recommended R toolchain)
> and conda appears to mostly end in tears.
>
> | I talked to several software engineers; however, I could not find a
> | convincing answer. I think I do not know what I do not know about this
> | topic, which prevents me from asking good questions. I would be grateful
> if
> | you could let me know your thoughts about these questions.
>
> Again, a reproducible example would help.
>
> Rcpp is used by over 2300 packages on CRAN. Many use OpenMP. You can search
> at GitHub within the mirroring 'cran' organisation to see what other
> packages
> do. Given that you can also see the outcome (the package 'status' pages at
> CRAN) that is not a bad approach.
>
> Dirk
>
> | Where is a good place to start learning about this topic?
> | Is a professional C++ developer necessarily good at troubleshooting
> | problems with compilers and linkers? Or these are two different topics.
> |
> | Best regards,
> | Naeem Khoshnevis
> | _______________________________________________
> | Rcpp-devel mailing list
> | Rcpp-devel at lists.r-forge.r-project.org
> | https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/rcpp-devel
> --
> https://dirk.eddelbuettel.com | @eddelbuettel | edd at debian.org
>
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