[Rcpp-devel] Specifying additional include path in Rcpp package

[Rainer M Krug]

Hi

I am sure thsi has been answered or is in the manuals, but I just can't
find it - I probably made a stupid mistake.

But I don't manage to specify additional include paths in a package using Rcpp.

in my grassRLink.h file I have:

,----
| #ifndef _grassRLink_grassRLink_H
| #define _grassRLink_grassRLink_H
| 
| #include <Rcpp.h>
| 
| #include <stdio.h>
| #include <stdlib.h>
| 
| #include <grass/gis.h>
| #include <grass/raster.h>
| #include <grass/glocale.h>
| 
| using namespace Rcpp;
| 
| RcppExport SEXP readRast(String name, String mapset, int row, int col) ;
| #endif
`----

and to find the files grass/gis.h, grass/raster.h and grass/glocale.h I
have the following in y Makevars  

,----
| #!/bin/bash
| ## Use the R_HOME indirection to support installations of multiple R version
| PKG_LIBS = `$(R_HOME)/bin/Rscript -e "Rcpp:::LdFlags()"`
| PKG_LIBS = $PKG_LIBS:/Applications/GRASS/GRASS-7.0.app/Contents/MacOS/include/
| 
| ## some commentsAs an alternative, one can also add this code in a file 'configure'
`----

with the idea that the include path is added. But when I use load_all(.)
to laod the package, I get the following error:

,----
| > load_all(".", recompile=TRUE)
| Loading grassRLink
| Re-compiling grassRLink
| '/Library/Frameworks/R.framework/Resources/bin/R' --vanilla CMD INSTALL  \
|   '/Users/rainerkrug/Documents/Projects/grassRLink'  \
|   --library='/var/folders/50/wcr5bjwn75q595n6x82gxj280000gn/T//RtmpgWwh9v'  \
|   --no-R --no-data --no-help --no-demo --no-inst --no-docs --no-exec  \
|   --no-multiarch --no-test-load --preclean 
| 
| * installing *source* package 'grassRLink' ...
| ** libs
| llvm-g++-4.2 -arch x86_64 -I/Library/Frameworks/R.framework/Resources/include -DNDEBUG  -I/usr/local/include -I"/Users/rainerkrug/Library/R/3.0/library/Rcpp/include"  -UNDEBUG -Wall -pedantic -g -O0 -fPIC  -mtune=core2 -g -O2  -c RcppExports.cpp -o RcppExports.o
| llvm-g++-4.2 -arch x86_64 -I/Library/Frameworks/R.framework/Resources/include -DNDEBUG  -I/usr/local/include -I"/Users/rainerkrug/Library/R/3.0/library/Rcpp/include"  -UNDEBUG -Wall -pedantic -g -O0 -fPIC  -mtune=core2 -g -O2  -c grassRLink.cpp -o grassRLink.o
| In file included from grassRLink.cpp:2:
| grassRLink.h:10:23: error: grass/gis.h: No such file or directory
| grassRLink.h:11:26: error: grass/raster.h: No such file or directory
| grassRLink.h:12:27: error: grass/glocale.h: No such file or directory
| grassRLink.cpp: In function 'Rcpp::NumericVector readRast(Rcpp::String, Rcpp::String, int, int)':
| grassRLink.cpp:7: error: new declaration 'Rcpp::NumericVector readRast(Rcpp::String, Rcpp::String, int, int)'
| grassRLink.h:28: error: ambiguates old declaration 'SEXPREC* readRast(Rcpp::String, Rcpp::String, int, int)'
| grassRLink.cpp:9: error: 'RASTER_MAP_TYPE' was not declared in this scope
| grassRLink.cpp:9: error: expected `;' before 'data_type'
| grassRLink.cpp:16: error: 'G_gisinit' was not declared in this scope
| grassRLink.cpp:19: error: 'Rast_open_old' was not declared in this scope
| grassRLink.cpp:22: error: 'data_type' was not declared in this scope
| grassRLink.cpp:22: error: 'Rast_map_type' was not declared in this scope
| grassRLink.cpp:25: error: 'Rast_allocate_buf' was not declared in this scope
| grassRLink.cpp:28: error: 'Rast_window_rows' was not declared in this scope
| grassRLink.cpp:29: error: 'Rast_window_cols' was not declared in this scope
| grassRLink.cpp:34: error: 'Rast_get_row' was not declared in this scope
| grassRLink.cpp:40: error: 'CELL_TYPE' was not declared in this scope
| grassRLink.cpp:42: error: 'FCELL_TYPE' was not declared in this scope
| grassRLink.cpp:44: error: 'DCELL_TYPE' was not declared in this scope
| grassRLink.cpp:12: warning: unused variable 'nrow'
| grassRLink.cpp:12: warning: unused variable 'ncol'
| grassRLink.cpp:49: warning: no return statement in function returning non-void
| make: *** [grassRLink.o] Error 1
| ERROR: compilation failed for package 'grassRLink'
| * removing '/private/var/folders/50/wcr5bjwn75q595n6x82gxj280000gn/T/RtmpgWwh9v/grassRLink'
| * restoring previous '/private/var/folders/50/wcr5bjwn75q595n6x82gxj280000gn/T/RtmpgWwh9v/grassRLink'
| Error: Command failed (1)
| > 
`----

telling me that the additional header files are not found, even though
the path seems to be added:

,----
| -I/Library/Frameworks/R.framework/Resources/include 
`----

It is probably my limited C / C++ expertise, but wat is going on here?

I am working on OS X Mountain Lion, gcc is installed via homebrew, and I
can compile other packages without problems.

You can find the package at github:

https://github.com/rkrug/grassRLink

Any suggestions?

Thanks,

Rainer

-- 
Rainer M. Krug

email: RMKrug<at>gmail<dot>com
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