[Rcpp-devel] PKG_CPPFLAGS and PKG_LIBS not being picked for compilation

[Dirk Eddelbuettel]

Hi Chaomei,

On 23 April 2014 at 14:57, Chaomei Lo wrote:
| I am testing the TRNG (Random number generation) using Rcpp, but it seems like
| the PKG_CPPFLAGS and PKG_LIBS not being picked for compilation and creating
| shared library.  I invoked the R shell right above the “trng”.
 
I would recommend to use a package instead.  

Then you can set whatever you need in src/Makevars. 

sourceCpp() was not designed for this.  If you insist, you can write yourself
your own plugin (see eg the Rcpp FAQ) but you may still want a package to
provide the plugin.

I suspect you are getting bitten here in as much as the environment
variables being set to R and affect one subshell which calls 'R CMD ...' but
not into the commands being spawned by R. 

In a nutshell, this method is not documented to work, so just don't do it...

Dirk

| 
| > getwd()
| 
| [1] "/people/mei/trng-4.15"
| 
| > library(Rcpp)
| 
| > Sys.setenv(“PKG_CPPFLAGS”=”-I.”)
| 
| > Sys.setenv(“PKG_CXXFLAGS”=”-fopenmp”)
| 
| > Sys.setenv(“PKG_LIBS”=”-L/people/mei/trng-4.15/conf_prefix/lib -ltrng4″)
| 
| > sourceCpp(“prunif.cpp”)
| 
| prunif.cpp:4:26: fatal error: trng/yarn2.hpp: No such file or directory
| 
| compilation terminated.
| 
| make: *** [prunif.o] Error 1
| 
| g++ -I/people/mei/softwarelib/R-3.0.2/include -DNDEBUG -I. -I/usr/local/include
| -I”/people/mei/softwarelib/R-3.0.2/library/Rcpp/include” -fopenmp -fpic -g -O2
| -c prunif.cpp -o prunif.o
| 
| Error in sourceCpp(“prunif.cpp”) :
| 
| Error 1 occurred building shared library.
| 
|  
| 
| 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