[R-pkg-devel] Solaris x68 and C++17

[Florian Rupprecht]

Thank you for the quick response and the information.

For some reason the Solaris results have now disappeared completely from
the check results page. (Now there are some additional issues I have to
look into.)

I will wait for the rest of the checks to complete and might write a
similar shell script to yours if it's needed. Thanks for the code snippets.

Glad you liked it!

Florian

 Tue, Jan 19, 2021, 18:26 Dirk Eddelbuettel <edd using debian.org> wrote:

>
> On 19 January 2021 at 17:45, Florian Rupprecht wrote:
> | Hello,
> |
> | the CRAN checks show an error for my newly released package 'httpgd' with
> | 'r-patched-solaris-x86':
> |
> | Error: C++17 standard requested but CXX17 is not defined
> |
> | It seems like 'rcppsimdjson' had the same problem (
> | https://github.com/eddelbuettel/rcppsimdjson/issues/7) and worked
> around it
> | by disabling some functionality with compiler flags.
>
> Clarification: An earlier release required C++17. Later releases relaxed
> that. We only need C++11 these days. (And I just noticed that I should
> updated Makevars.win accordingly but it really isn't a constraint with
> Rtools4).
>
> The test is still in configure though, and it appears that Solaris is still
> having the same issue.  Here is what I did (where configure is once again a
> shell script):
>
>    CXX17=`${R_HOME}/bin/R CMD config --all | awk '{print $1}' | grep
> "^CXX17$"`
>
>    [...]
>
>
>    if test "x${CXX17}" = "x"; then
>        echo "** this is not a system on which RcppSimdJson can be built"
>        echo "** setting C++11 as a fallback"
>        sed -e 's/@CXXSTD@/CXX11/' src/Makevars.in > src/Makevars
>    else
>
> | I don't really know what the error means for the CRAN package. Will it be
> | removed if it is not fixed? The R extension documentation states that
> C++17
> | is supported since R 3.4.0, and I do have R >= 4.0.0 as well as C++17
> | specified in the DESCRIPTION file.
> | Or is there some way to indicate that Solaris is not supported? (I doubt
> I
> | will ever have users running it.)
>
> Fair question. I don't know the answer. As package authors we have no
> sanctioned way to opt out.  FWIW I think the most 'aggressive' my packages
> are in terms of C++ standard is currently C++14 (as e.g. RcppGeiger, which
> isn't even on CRAN).
>
> httpgd is a cool package by the way, I gave plotting to the webbrowser a
> quick spin this morning.
>
> Dirk
>
>
> --
> https://dirk.eddelbuettel.com | @eddelbuettel | edd using debian.org
>

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