Index 22 is missing which causes issues on windows with opmizations defined after this line. Chaging to   ```  OPTFLAG(SSE2     ,22, "sse2",       "SSE2 instructions on x86")  OPTFLAG(GSHAREDVT,23, "gsharedvt",\t"Generic sharing for valuetypes")  OPTFLAG (GSHARED, 24, "gshared", "Generic Sharing")  OPTFLAG(SIMD\t ,25, "simd",\t    "Simd intrinsics")  ...  ```  works.