[Rcpp-devel] Compiler errors with RcppGSL

[Dirk Eddelbuettel]

On 12 November 2014 at 18:08, Devin Heer wrote:
| Thanks for your quick reply!
| 
| Indeed, the file you described within RcppGSL\examples\RcppGSLExample\src looks
| as follows:
| 
| ## This assumes that the LIB_GSL variable points to working GSL libraries
| PKG_CPPFLAGS=-I$(LIB_GSL)/include
| PKG_LIBS=-L$(LIB_GSL)/lib -lgsl -lgslcblas
| 
| 
| I can now simply replace LIB_GSL by the path where my GSL folder is located?

Sure. The better way, though, is to the set the environment variable to the
value of the directory. That way the portable code remains valid, and next
you time you upgrade/build it still works.

See any of the many fine tutorials on the web on how to set an environment
variable. 
 
| And when I define a new function (outside RcppGSLExample), which Makevars.win
| file is then queried? (since there is also a makevars.win file in RcppGSL\
| skeleton; I should update this as well?)

Always the one in the src/ directory of the package you are building.

Dirk
 
| Thanks
| 
| On Wed, Nov 12, 2014 at 3:32 PM, Dirk Eddelbuettel <edd at debian.org> wrote:
| 
| 
|     Hi Devin,
|    
|     On 12 November 2014 at 15:13, Devin Heer wrote:
|     | Thus, I would really like to get the RcppGSL package up and running. I
|     have
|     | downloaded the GSL library and saved it in the same folder where the
|     header
|     | file Rcpp.h is located (I assume this is the default place RcppGSL is
|     looking
|     | for header- and source files). 
| 
|     Nope. See below.
|    
|     | For test purposes, I try to compile the following (copied from
|     r-bloggers):
| 
|     [...]
| 
|     | c:/rbuildtools/3.1/gcc-4.6.3/bin/../lib/gcc/i686-w64-mingw32/4.6.3/../..
|     /../../
|     | i686-w64-mingw32/bin/ld.exe: cannot find -lgsl
|       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
| 
|     You need to communicate to your systeh where GSL is.
| 
|     Linux and OS X do that by querying the gsl-config script.
| 
|     Windows does that by querying the environment variable LIB_GSL, see src/
|     Makevars.win
|     and this comment:
| 
|        ## This assumes that the LIB_GSL variable points to working GSL
|     libraries
| 
|     The RcppGSL package comes with its test package examples/RcppGSLExample --
|     I
|     would recommend trying to build that first.
|    
|     Dirk
| 
|     --
|     http://dirk.eddelbuettel.com | @eddelbuettel | edd at debian.org
| 
| 

-- 
http://dirk.eddelbuettel.com | @eddelbuettel | edd at debian.org