How to build qpdf on Windows?

Question

When running the checks for my R-package (via devtools::check()) I face the warning \'\'qpdf\' is needed for checks on size reduction of PDFs. I found

Answer 1

You basically do not need to build the file on windows. Please follow three steps below:

1. Download qpdf for windows from https://sourceforge.net/projects/qpdf/?source=typ_redirect
2. Extract files in a temp folder
3. Copy the contents of the bin folder to %SystemRoot%\System32

job done!

Sys.which(Sys.getenv("R_QPDF", "qpdf"))
                             qpdf 
"C:\\WINDOWS\\SYSTEM32\\qpdf.exe"