6.8 on Windows

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Gets Around
I try to compile with MinGW as usually.

gfortran  -c  -fno-tree-dominator-opts  -m32 -march=pentium4 -mtune=pentium4 -O2  -ffast-math -Wuninitialized -fno-aggressive-loop-optimizations -fno-tree-dominator-opts  -O2 -ffast-math -Wuninitialized -I. -I/home/Layruoru/MPICH2/include -I/home/Layruoru/nwchem-6.8/src/include -I/home/Layruoru/nwchem-6.8/src/tools/install/include -DLINUX -DGFORTRAN -DGCC46 -DCHKUNDFLW -DGCC4 -DPARALLEL_DIAG  -DMPI -DMPI4  Dne_omp.F

       USE omp_lib
Fatal Error: Can't open module file 'omp_lib.mod' for reading at (1): No such file or directory
compilation terminated.
make[4]: *** [/home/Layruoru/nwchem-6.8/lib/LINUX/libnwpwlib.a(Dne_omp.o)] Error 1
make[3]: *** [optimized] Error 2
make[2]: *** [subdirs] Error 1
make[1]: *** [subdirs] Error 1
make: *** [libraries] Error 1

What is Dne_omp?
What to do?