I am trying to build the RSAP package by Piers Harding (https://github.com/piersharding/RSAP). I followed his instructions for how to build on an R > 3.x.x version. When building the library via...:
R CMD INSTALL --build --preclean --clean --no-multiarch -l C:/RSAP RSAP
... I get the error "RSAP dll not found".
I am using the 64bit version of R 3.5.1 and latest RTools. I am on Windows 10.