libkml installation with mingw32 - error

I am trying to install libkml with mingw32 (msys). I get this error during make.

time_util.cc:43:35: error: use of C++11 long long integer constant [-Werror=long-long] #define DELTA_EPOCH_IN_MICROSECS 11644473600000000ULL ^ time_util.cc:58:18: note: in expansion of macro 'DELTA_EPOCH_IN_MICROSECS' file_time64 -= DELTA_EPOCH_IN_MICROSECS; ^ cc1plus.exe: all warnings being treated as errors What is the possible issue? I googled and found something on the flag -Wno-long-long but wasn't able to use it successfully.