[Rcpp-devel] R CMD check not happy about -std=c++0x

Hello,

With a lot of hard work this weekend, we finally found a decent 
workaround, using the CXXOPTS variable as follows:

PKG_CPPFLAGS=$(shell Rscript -e "Rcpp:::CxxFlags()" )
PKG_LIBS = $(shell Rscript -e "Rcpp:::LdFlags()" )
CXXOPTS = $(shell Rscript -e "Rcpp:::Cxx0xFlags()" )

where Rcpp:::Cxx0xFlags will be available in the next version (already 
in the development version)

- Rcpp:::CxxFlags() will no longer include "-std=c++0x" because this is 
forbidden by R.
- Rcpp:::Cxx0xFlags() checks which compiler is in use, and iif this is 
GCC >= 4.3 it adds "-std=c++0x"

This makes both R CMD check and us happy.

Romain

Hi,

I'm getting a warning when I try to build my CPP package that depends on
Rcpp and uses the classic Makevars :

PKG_CXXFLAGS=`Rcpp:::CxxFlags()` -I.
PKG_LIBS=`Rcpp:::LdFlags()`


I get this warning from R CMD check :

* checking for portable compilation flags in Makevars ... WARNING
Non-portable flags in variable 'PKG_CXXFLAGS':
    -std=c++0x


Is there a workaround ? We probably would then have to update the new
skeleton generator to use it.

Romain

Romain Francois
Professional R Enthusiast
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http://romainfrancois.blog.free.fr
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