[Rcpp-devel] Hello world for Rcpp modules

[Dirk Eddelbuettel]

On 12 August 2011 at 07:34, Chris DuBois wrote:
| Sorry, but that's just me being lazy with my lib directory.  When I start R
| back up in my example, you'll see it's 2.13.1.  

Well then maybe do some cleanup at your end. As I said, it works in all
regression tests and explicitly too, so I still think this is local to your
end.  See here:

edd at max:~$ cd /tmp/
edd at max:/tmp$ r -lRcpp -e'Rcpp.package.skeleton("chrisExample",module=TRUE)'

Attaching package: 'utils'

The following object(s) are masked from 'package:Rcpp':

    .DollarNames, prompt

Creating directories ...
Creating DESCRIPTION ...
Creating NAMESPACE ...
Creating Read-and-delete-me ...
Saving functions and data ...
Making help files ...
Done.
Further steps are described in './chrisExample/Read-and-delete-me'.

Adding Rcpp settings
 >> added RcppModules: yada
 >> added Depends: Rcpp
 >> added LinkingTo: Rcpp
 >> added useDynLib directive to NAMESPACE
 >> added Makevars file with Rcpp settings
 >> added Makevars.win file with Rcpp settings
 >> added example header file using Rcpp classes
 >> added example src file using Rcpp classes
 >> added example R file calling the C++ example
 >> added Rd file for rcpp_hello_world
 >> copied the example module 
edd at max:/tmp$ R CMD INSTALL chrisExample/
* installing to library ‘/usr/local/lib/R/site-library’
* installing *source* package ‘chrisExample’ ...
** libs
ccache g++-4.5 -I/usr/share/R/include   -I"/usr/local/lib/R/site-library/Rcpp/include"   -fpic  -g0 -O3 -Wall -pipe -pedantic -Wno-variadic-macros  -c rcpp_hello_world.cpp -o rcpp_hello_world.o
ccache g++-4.5 -I/usr/share/R/include   -I"/usr/local/lib/R/site-library/Rcpp/include"   -fpic  -g0 -O3 -Wall -pipe -pedantic -Wno-variadic-macros  -c rcpp_module.cpp -o rcpp_module.o
g++ -shared -o chrisExample.so rcpp_hello_world.o rcpp_module.o -L/usr/local/lib/R/site-library/Rcpp/lib -lRcpp -Wl,-rpath,/usr/local/lib/R/site-library/Rcpp/lib -L/usr/lib64/R/lib -lR
installing to /usr/local/lib/R/site-library/chrisExample/libs
** R
** preparing package for lazy loading
** help
Warning: /tmp/chrisExample/man/chrisExample-package.Rd:32: All text must be in a section
Warning: /tmp/chrisExample/man/chrisExample-package.Rd:33: All text must be in a section
*** installing help indices
** building package indices ...
** testing if installed package can be loaded

* DONE (chrisExample)
edd at max:/tmp$ r -lchrisExample -p -e'rcpp_hello_world()'
[1] "chrisExample" "Rcpp"         "methods"      "base"        
[[1]]
[1] "foo" "bar"

[[2]]
[1] 0 1

edd at max:/tmp$ 


r is from littler, -lfoo loads package foo, -p enables print and -e evaluates
the expression.

The 'ccache g++-4.5' comes from my ~/.R/Makevars.

Dirk 

-- 
Two new Rcpp master classes for R and C++ integration scheduled for 
New York (Sep 24) and San Francisco (Oct 8), more details are at
http://dirk.eddelbuettel.com/blog/2011/08/04#rcpp_classes_2011-09_and_2011-10
http://www.revolutionanalytics.com/products/training/public/rcpp-master-class.php