[Rcpp-devel] Solved: Rcpp11 and Travis CI

It sounds like you just need to declare that your package depends on
C++11 in the standard way:

- Add 'SystemRequirements: C++11' to your DESCRIPTION file,
- Create files at 'src/Makevars[.win]', and make sure you have CXX_STD = CXX11

This is documented in more detail in R-exts: see
<https://cran.r-project.org/doc/manuals/r-release/R-exts.html#Using-C_002b_002b11-code>

Thanks,
Kevin

On Wed, Mar 16, 2016 at 11:25 AM, Richel Bilderbeek
<<richel at richelbilderbeek.nl>> wrote:

I am working on a minimal example of using Rcpp11 and Travis CI, which I
keep at this GiHub:
<https://github.com/richelbilderbeek/travis_qmake_gcc_cpp11_rcpp> . It has one
function that is labeled 'noexcept', thus C++11.

I can compile and run the C++11 code from a Qt Creator project file (called
'domagic.pro'),
I can successfully create the 'domagic' package that uses an R function to
call the C++11 function.

Because Travis CI does not automate multiple languages yet, I want it to
check the R package automatically. I got this working for C++98 (at this
GitHub: <https://github.com/richelbilderbeek/travis_qmake_gcc_cpp98_rcpp> ).

For C++11 there is one extra step: one has to run the following line in
RStudio (a tip from Dirk Edelbuettel):
Sys.setenv("PKG_CXXFLAGS"="-std=c++11")
When I then run 'devtools::check()' on the package, everything works without
notes/warnings/errors.

But how to let Travis CI do the same? I tried to add it to the .travis.yml,
but this was more guessing than first reading how to do so. Also adding
'Rcpp11' to the package DESCRIPTION, adding [[Rcpp11::export]] or [[export]]
to the C++11 function documentation are ideas that I have tried in multiple
random ways.

Can it be done? Are there suggestions?

Thanks in advance, Richel Bilderbeek