H:\zlib\zlib-1.2.7\contrib\masmx64
bld_ml64.bat
Zlib
cd srclib\zlib nmake -f win32\Makefile.msc AS=ml64 LOC="-DASMV -DASMINF -I." OBJA="inffasx64.obj gvmat64.obj inffas8664.obj"
AS=ml64 tells nmake to use ml64 (Macro Assembler x64) as our assembler, -DASMV and -DASMINF are both defines in inffas8664.c which I'm not sure what they actually do.