[Rcpp-devel] loading failed

[Kevin Ushey]

You need to link to GSL as well. RcppGSL provides the appropriate flags
within `RcppGSL::LdFlags()`. See what RcppGSL does itself in its configure
scripts:
https://github.com/eddelbuettel/rcppgsl/blob/2849b8dd777c8057e524c2141dfeaa8e28840350/inst/skeleton/configure.win
.

Kevin


On Tue, May 5, 2015 at 2:08 PM, Fabio Tordini <tordini at di.unito.it> wrote:

> Ok, I found the 'scrm' Rcpp package: here the file scrmr.cpp provides an
> interface for calling the scrm C++ application from R. following their
> solution, I modified my Makevars file, adding:
>
> OBJECTS.PnuChart = ngraph.o RcppExports.o
> OBJECTS.PnuChart = PnuChart/Finder.o
> OBJECTS = $(OBJECTS.PnuChart)
>
> Now the linker finds the object files and knows where functions "are". so,
> previous error is solved.
>
> but loading still fails with the following message:
>
>  /home/fabio/R/x86_64-pc-linux-gnu-library/3.0/NgrapH/libs/NgrapH.so:
> undefined symbol: gsl_vector_alloc
> Error: loading failed
>
> In fact, I do use gsl, that's why I added RcppGSL in the DESCRIPTION file
> at 'LinkingTo'. Also, I use the attribute
> '// [[Rcpp::depends(RcppGSL)]]' in those headers where GSL functions are
> used, and included <RcppGSL.h>. I do not export those functions because
> they're not called directly from R.
>
> still, I get the loading failed error.
>
>
> Fabio
>
>
>
>
>
> On 05/05/2015 10:15 PM, Dirk Eddelbuettel wrote:
>
>>
>> On 5 May 2015 at 16:28, Fabio Tordini wrote:
>> | Here is the actual (simple) code:
>> |
>> |       Finder *f = new Finder();
>> |       f->parseFiles(str_g, str_f, str_s);
>>
>> So where is Finder implemented?
>>
>> The computer tells you that you want to use it, but don't supply it.
>>
>> Dirk
>>
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