Are there any working instructions about how to build and test dmd on Windows?

[rumbu]

I know that there are contributing guides but I fail to 
successfully follow any of them:

https://wiki.dlang.org/Starting_as_a_Contributor

1. Bash install script will not run under Windows. Using git bash 
will result in error (Command error: undefined switch '-C')
2. Digger it's not compiling
3. Tried to make my own powershell script to mimic the setup.sh 
behavior. I'm stuck at compilation part (below)

https://wiki.dlang.org/Building_under_Windows

1. After several retries, I managed to compile DMD with make 
-fwin32.mak. In fact I'm not sure which is the intended makefile 
(the one in \dmd or the one in \dmd\src?)
2. make -fwin64.mak fails:

make -fwin32.mak C=dmd\backend TK=dmd\tk ROOT=dmd\root 
MAKE="make" HOST_DC="dmd" MODEL=64 CC="vcbuild\msvc-dmc" 
LIB="vcbuild\msvc-lib" 
OBJ_MSVC="..\generated\windows\release\64/strtold.obj 
..\generated\windows\release\64\longdouble.obj 
..\generated\windows\release\64\ldfpu.obj" "OPT=" "DEBUG=-D -g 
-DUNITTEST" "DDEBUG=-debug -g -unittest" "DOPT=" 
"LFLAGS=-L/ma/co/la" ..\generated\windows\release\64\dmd.exe
vcbuild\msvc-dmc -c 
-o..\generated\windows\release\64\newdelete.obj -Idmd\root   -D 
-g -DUNITTEST -cpp -DTARGET_WINDOS=1 -DDM_TARGET_CPU_X86=1 
dmd\root\newdelete.c
"\Program Files (x86)\Microsoft Visual Studio 
10.0\VC\bin\amd64\cl.exe" /nologo /Ivcbuild /Idmd\root 
/FIwarnings.h /c /Fo..\generated\windows\release\64\newdelete.obj 
/Idmd\root /DDEBUG /Zi -DUNITTEST /TP ^"-DTARGET_WINDOS=1^" 
^"-DDM_TARGET_CPU_X86=1^" dmd\root\newdelete.c

std.process.ProcessException at std\process.d(753): Failed to spawn 
new process (The system cannot find the file specified.)
----------------
0x004136E8
0x0040D98A
0x00402CDB
0x00412D67
0x00412CE9
0x00412B84
0x0040D5D7
0x758A8654 in BaseThreadInitThunk
0x77B84A77 in RtlGetAppContainerNamedObjectPath
0x77B84A47 in RtlGetAppContainerNamedObjectPath

--- errorlevel 1

--- errorlevel 1

--- errorlevel 1


https://wiki.dlang.org/DMD_development

1. Downloaded GNU Make. How do I install it? What binaries are 
needed?
2. Installed Linux Subsystem (Debian). What next? Why do I need 
this?
3. All the make commands failed to execute. I suppose because 
make.exe is expected to be part of the GNU package. Failed to 
find such file in the GNU Make distribution.