[Rcpp-devel] Specify include path with Rcpp.plugin.maker

[Vaclav Petras]

On 18 July 2012 17:56, Dirk Eddelbuettel <edd at debian.org> wrote:
>
> On 18 July 2012 at 17:13, Vaclav Petras wrote:
> | Hello,
> |
> | how should be an include path for a plugin created by
> | Rcpp:::Rcpp.plugin.maker specified?
> |
> | I'm using a library which is not in the standard path. I'm able to
> | specify -Wl,-rpath and -L options but I don't know where -I should be
> | specified.
> |
> | As an example I used the GSL example from Rcpp-FAQ. GSL headers are in
> | standard path so everything works. But if I modify this example to use
> | gsl_rng.h instead of gsl/gsl_rng.h it is necessary to set
>
> Why?  Every GSL example uses
>
>    #include <gsl/somefile.h>
>
> and it is standard to specify it with directory/filename. Many libraries (eg
> Boost) do the same.

I used it just as an minimal working example. I'm sorry for confusion.

I need it for _truly new libraries_ and same would apply also for my
own library if i have some.

As I see I didn't include to my previous email explicit sentence
stating that I need really custom include path. So here it is.

Vaclav

>
> | -I/usr/include/gsl somewhere. Only thing which worked for me is:
> |
> |  Sys.setenv(PKG_CXXFLAGS="-I/usr/include/gsl/")
> |
> | export CXXFLAGS or PKG_CXXFLAGS in command line (and than running
> | Rscript) or using Makefile="-I/usr/include/gsl/" (plugin.maker param)
> | didn't helped. I also tried
> |  myplugin$env$PKG_CXXFLAGS <- "-I/usr/include/gsl/"
> | but I got some R errors.
> |
> | My platform is GNU/Linux, dist. Ubuntu 10.04.
>
> Many of us develop on that platform. "It just works."
>
> | Now I'm trying compile simple function only but in the future I want
> | to build some R package too, so I'm asking if there can be problem
> | with this also in this case (I didn't studied documentation for
> | building packages yet).
> |
> | I think that some parameter is missing in the interface
> | (Rcpp.plugin.maker) or that the documentation is not complete (or I'm
> | just missing something of course).
>
> Yes, I think you just confused yourself.
>
> For _truly new libraries_ and non-standard locations, you may have to use a
> combination of autoconf / configure to specify what goes into the plugin
> maker. But for something as common as the GSL, this not an issue.
>
> If I misunderstood your question and you are wondering how to generally
> modify the plugin components: you probably want to look at the code in the
> inline package, as well as for the R commands. As I recall, every variable
> set in the plugin environment gets passed on before system() is called.  So
> you could try PKG_CFLAGS etc as documented for R CMD INSTALL et al.
>
> Dirk
>
> |
> | Thanks for help,
> | Vaclav
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>
> --
> Dirk Eddelbuettel | edd at debian.org | http://dirk.eddelbuettel.com