I guess libqpdf17 belongs into the qpdf-dependencies:
$cygcheck qpdf Found: C:\cygwin\bin\qpdf.exe C:\cygwin\bin\qpdf.exe C:\cygwin\bin\cygwin1.dll C:\WINDOWS\system32\KERNEL32.dll C:\WINDOWS\system32\ntdll.dll C:\WINDOWS\system32\KERNELBASE.dll C:\cygwin\bin\cyggcc_s-1.dll C:\cygwin\bin\cygstdc++-6.dll cygcheck: track_down: could not find cygqpdf-17.dll -Helmut -- -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple