Scribbles for rgdal
svn checkout svn://scm.r-forge.r-project.org/svnroot/rgdal/trunk etc. TODO
Current process is cross-compiler based on Linux, managed by CRAN. There are notes from the first success but the details are now private(?) to CRAN.
Bivand in the past used MSYS, and OSGeo4W, Sumner used Visual Studio - see inst/README.windows