[Rcpp-devel] g++ flags

[Kevin Ushey]

Hi Gabor,

Looks like it was a bug on our end -- R-exts specifies that USE_CXX1X
should be set to any value; we try to set it to nothing (ie, define it
but leave it empty) but apparently that is not accepted.

I just pushed a bug fix to GitHub and it works on my Windows VM; can
you give it another shot?

Thanks,
Kevin

On Tue, May 6, 2014 at 9:09 PM, Gabor Grothendieck
<ggrothendieck at gmail.com> wrote:
> On Windows with R 3.1 I installed the latest Rcpp from github and did
> the following but the compliation gave an error which was was due to
> the C++11 constructs.  If I rerun it but uncomment the Sys.setenv line
> then it works. What do I do to get the cpp11 attribute to work?
>
> library(Rcpp)
> # Sys.setenv("PKG_CXXFLAGS"="-std=c++0x")
> cat('
> // [[Rcpp::plugins("cpp11")]]
> // [[Rcpp::export]]
> int useCpp11() {
>     auto x = 10;
>     return x;
> }
> ', file = "testauto.cpp")
> sourceCpp("testauto.cpp")
>
> On Wed, Apr 30, 2014 at 11:12 AM, Dirk Eddelbuettel <edd at debian.org> wrote:
>>
>> On 30 April 2014 at 10:05, Dirk Eddelbuettel wrote:
>> |
>> | On 30 April 2014 at 10:41, JJ Allaire wrote:
>> | | I think that might be overkill (or something that we can do later if users ask
>> | | for it).
>> |
>> | It is a one-liner, and it just sits there to be used, like OpenMP plugin.
>> |
>> | So in that sense it doesn't hurt, and it may yet help those for which both R
>> | < 3.1.0 and Windows are true.
>>
>> Actually, as Gabor points out, where 'R < 3.1.0' and 'g++ < 4.7' which may
>> also be a bunch of servers running older RHEL or Ubuntu LTS.
>>
>> Dirk
>>
>> --
>> Dirk Eddelbuettel | edd at debian.org | http://dirk.eddelbuettel.com
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>
>
>
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