[Rcpp-devel] Question about using Rcpp to integrate C++ code with Boost Graph Library

[Kevin Ushey]

Hi Won-min,

1) There shouldn't be a space between -L and the directory containing your
boost libraries. Also, ensure that the libboost_graph.a file is available
in that directory as well -- is there a chance that you have
'libboost_graph-mt.a', the multi-threaded flavor, instead?

2) You don't want to wrap the whole expression in parentheses. The Rcpp
library location is found by calling Rscript and checking Rcpp:::LdFlags()
through a shell on Windows.

It's better to have the directory containing your boost libraries somewhere
in your PATH, so that you simply need to put '-lboost_graph' in the
PKG_LIBS variable. So, try:

PKG_LIBS = $(shell ${R_HOME}/bin/Rscript.exe -e "Rcpp:::LdFlags()")
-L"C:/Users/Won/Documents/Boost/boost_1_51/lib" -lboost_graph

or, perhaps better,

PKG_LIBS = $(shell ${R_HOME}/bin/Rscript.exe -e "Rcpp:::LdFlags()")
-lboost_graph

with the library found somewhere in your PATH.

-Kevin

On Sun, Jan 20, 2013 at 8:31 PM, Song, Won-min <won-min.song at mssm.edu>wrote:

> Hi Dirk,
>
> Thanks alot for your reply. Nevertheless, it doesn't seem I don't have
> `Rcmd COMPILE' running in my R.
> I do have other functions such as Rcmd INSTALL, build etc, but couldn't
> find 'COMPILE' from the Rcmd options in the help display.
>
> After you pointed out that I should have used -L/-I options in PKG_LIBS, I
> tried the following in Makevars.win file:
>
> PKG_LIBS = $(shell ${R_HOME}/bin/Rscript.exe -e "Rcpp:::LdFlags()" -L
> "C:/Users/Won/Documents/Boost/boost_1_51/lib" -lboost_graph)
>
> and it still doesn't recognize boost library.
>
> As I am rather a beginner in R, it is likely that there is something
> missing. Could you or anyone direct me to right direction?
>
> Thanks,
>
> Won
> ________________________________________
> From: Dirk Eddelbuettel [edd at debian.org]
> Sent: Saturday, January 19, 2013 9:29 AM
> To: Song, Won-min
> Cc: rcpp-devel at lists.r-forge.r-project.org
> Subject: Re: [Rcpp-devel] Question about using Rcpp to integrate C++ code
> with Boost Graph Library
>
> Hi,
>
> On 19 January 2013 at 08:14, Song, Won-min wrote:
> |
> | Hi,
> | I am a new beginner in using Rcpp with C++.
> | I have a piece of C++ code with Rcpp and boost graph library, and am
> trying to
> | make a package with helps from Rcpp.package.skeleton() command.
> |
> | When I try to install the package with Rcmd INSTALL pkgname (I'm running
> on
> | windows machine), it seems that it is not recognizing the boost library
> by
> | displaying error messages that it is not recognizing the header files
> from
> | boost. I used the following Makevars.win file in the src directory:
> |
> | PKG_LIBS = $(shell ${R_HOME}/bin/Rscript.exe -e "Rcpp:::LdFlags()")
> | PKG_CPPFLAGS = -L "C:/Users/Won/Documents/Boost/boost_1_51/lib"
> -lboost_graph
> |
> | C:/Users/Won/Documents/Boost/boost_1_51/lib is the directory where the
> .dll
> | files live.
> | Would you be able to point me in the right direction? Is there something
> I've
> | done wrong in Makevars.win file?
>
> You added the _linker_ arguments to the _header_ flag. That is wrong: -L/-l
> belong to PKG_LIBS.
>
> Try in the src/ directory to decompose the steps into
>
>     R CMD COMPILE mylib.dll *.cpp
>
> and
>
>     R CMD SHLIB mylib.dll
>
> (or some other name for mylib) to see that you can a) compile (does g++
> find
> headers) and b) link (does g++ find the dll).
>
> Dirk
>
> |
> | Any comments would be greatly appreciated.
> |
> | Thanks,
> |
> | ----------------------------------------------------------------------
> | _______________________________________________
> | Rcpp-devel mailing list
> | Rcpp-devel at lists.r-forge.r-project.org
> | https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/rcpp-devel
> --
> Dirk Eddelbuettel | edd at debian.org | http://dirk.eddelbuettel.com
> _______________________________________________
> Rcpp-devel mailing list
> Rcpp-devel at lists.r-forge.r-project.org
> https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/rcpp-devel
>
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