Errors on installing DPsurv

[guhjy]

devtools::install_github("alexpiche/dpsurv")
Downloading GitHub repo alexpiche/dpsurv@master
from URL https://api.github.com/repos/alexpiche/dpsurv/zipball/master
Installing DPsurv
"C:/PROGRA1/MICROS4/MRO-33~1.2/bin/x64/R" --no-site-file
--no-environ --no-save --no-restore --quiet CMD INSTALL
...

• installing source package 'DPsurv' ...
  ** libs
  C:\Rtools\mingw_64\bin\nm.exe: DP.o: File format not recognized
  C:\Rtools\mingw_64\bin\nm.exe: RcppExports.o: File format not recognized
  c:/Rtools/mingw_64/bin/g++ -m64 -shared -s -static-libgcc -o DPsurv.dll tmp.def DP.o RcppExports.o -LC:/swarm/workspace/External-R-3.3.2/vendor/extsoft/lib/x64 -LC:/swarm/workspace/External-R-3.3.2/vendor/extsoft/lib -LC:/PROGRA1/MICROS4/MRO-33~1.2/bin/x64 -lR
  DP.o: file not recognized: File format not recognized
  collect2.exe: error: ld returned 1 exit status
  no DLL was created
  ERROR: compilation failed for package 'DPsurv'
• removing 'F:/Dropbox/Stat/R/Library/DPsurv'
  Error: Command failed (1)