windows10 -- with secp256k1  ,the error as follow , how to fix it , thanks

C:/MinGW/mingw32/bin/../lib/gcc/i686-w64-mingw32/4.9.2/../../../../i686-w64-mingw32/bin/ld.exe: cannot find -lsecp256k1
collect2.exe: error: ld returned 1 exit status
Makefile.Release:408: recipe for target 'release\BitcoinFinal-qt.exe' failed
mingw32-make: *** [release\BitcoinFinal-qt.exe] Error 1

this github link

https://github.com/kampungcoin/BitcoinFinal