--- configure.ac.orig 2017-02-04 11:40:14.506284882 -0500 +++ configure.ac 2017-02-04 11:40:24.483325182 -0500 @@ -55,6 +55,12 @@ # Checks for libraries. AC_SEARCH_LIBS([recvfrom],[socket]) +case $host_os in + *mingw*|*msys*) + AC_CHECK_LIB([ws2_32],[main]) + ;; +esac + # Checks for library functions. AC_CHECK_LIB([bsd], [arc4random_buf]) AC_CHECK_FUNCS([srand48 lrand48 arc4random_buf])