undefined references when using Rcpp - r

Question

I am trying to build an R package that is a wrapper around a C library (and which uses gsl) in Windows. I can transition to Linux, if necessary
For better or worse, I put the make commands for the C library in Makevars.in.
I used Rstudio's Rcpp skeleton feature to create the package. I have installed Rtools 3.3 and using R 3.3.1
and I included Rcpp and RcppGSL in LinkingTo field of DESCRIPTION. I am still getting undefined reference errors for the make command
$(CXX) $(CXXFLAGS) $(OBJECTS) ../inst/libgraphm.a $(PKG_LIBS)
A few of the error are as follows
c:/Rtools/mingw_64/bin/g++ -shared -s -static-libgcc -o RGraphM.dll tmp.def graphmatch_rcpp.o RcppExports.o -L../inst -lgraphm -LC:/tools/gsl/lib/x64 -lgsl -lgslcblas -Ld:/Compiler/gcc-4.9.3/local330/lib/x64 -Ld:/Compiler/gcc-4.9.3/local330/lib -LC:/PROGRA~1/R/R-33~1.1/bin/x64 -lR
#cd graphm && /usr/bin/make
c:/Rtools/mingw_64/bin/g++ -O2 -Wall -mtune=core2 graphmatch_rcpp.o RcppExports.o ../inst/libgraphm.a -L../inst -lgraphm -LC:/tools/gsl/lib/x64 -lgsl -lgslcblas
graphmatch_rcpp.o: In function `PreserveStorage':
C:/Users/sadali/Documents/R/win-library/3.3/Rcpp/include/Rcpp/storage/PreserveStorage.h:10: undefined reference to `__imp_R_NilValue'
graphmatch_rcpp.o: In function `Vector':
C:/Users/sadali/Documents/R/win-library/3.3/Rcpp/include/Rcpp/vector/Vector.h:58: undefined reference to `Rf_allocVector'
graphmatch_rcpp.o: In function `Rcpp_ReplaceObject':
The answer to this similar (in my eyes) question seems to be inapplicable
Undefined reference errors when including Rcpp.h
as I am using LinkingTo and trying to create an R package
Edit: as the first answer suggested, I have tried building RcppZiggurat with the following Makevars.win :
PKG_CPPFLAGS = -I. -I../inst/include -IC:/tools/gsl/include
## Use the R_HOME indirection to support installations of multiple R version
PKG_LIBS = $(LDFLAGS) -L../inst -L$(LIB_GSL)/lib/x64 $(shell "${R_HOME}/bin${R_ARCH_BIN}/Rscript.exe" -e "RcppGSL:::LdFlags()")
I am getting these errors.
ziggurat.o:ziggurat.cpp:(.text+0x86): undefined reference to `gsl_rng_free'
ziggurat.o:ziggurat.cpp:(.text+0xa6): undefined reference to `gsl_rng_free'
ziggurat.o:ziggurat.cpp:(.text+0xc6): undefined reference to `gsl_rng_free'
ziggurat.o:ziggurat.cpp:(.text+0x1254): undefined reference to `gsl_rng_set'

Answer 1

I was able to get the windows build running successfully using this template for Makevars.win
https://github.com/adalisan/RGraphM/blob/master/src/Makevars.win.gen
and this script creates the Makevars.win
https://github.com/adalisan/RGraphM/blob/master/configure.win
Once the pre-built gsl windows libraries have been put in the directory defined by env. var LIB_GSL, both the compilation and linking steps worked.
One small issue is that the zip file for the pre-built libraries downloaded here include there are two subdirectories for two sub-architectures (i386 and x64)
You should make sure that you link against the right version and that -L"$(LIB_GSL)\lib\$(ARCH)" argument in the linker calls evaluates to the right directory for the sub-arch.
Thanks to the creators of Rcpp and RcppGSL for making the packaging of gsl-based code easier.

Answer 2

You have a misunderstanding of how this works:
The LinkingTo: field of DESCRIPTION does not linking, despite its name. It only helps for header files. Which is why your package compiled but did not link.
You need linker instructions. As has been said before, the mvabund and RcppZiggurat packages both link to the GSL using a tool from RcppGSL.
RcppZiggurat in particular may be a good example to follow as it is small. There is also an entire example package included in RcppGSL -- which we use as reference as well as in unit testing.