Cannot compile 7zip under MSVC2012 - c++

Question

I cannot compile 7zip under MSVC2012.
When i type:
C:\7zsrc> nmake NEW_COMPILER=1 MY_STATIC_LINK=1 Build.mak
I get this:
Microsoft (R) Program Maintenance Utility Version 11.00.50727.1
Copyright (C) Microsoft Corporation. All rights reserved.
link -nologo -OPT:REF -OPT:ICF /LARGEADDRESSAWARE -out:O\ oleaut32.li
b ole32.lib user32.lib advapi32.lib shell32.lib
LINK : fatal error LNK1104: cannot open file 'O\'
NMAKE : fatal error U1077: '"C:\Program Files (x86)\Microsoft Visual Studio 11.0
\VC\BIN\link.EXE"' : return code '0x450'
Stop.
What should i do to compile it? i tried checking in google but i didn't found anything related to this problem...
Also, here's Build.mak from 7zip souce package:
LIBS = $(LIBS) oleaut32.lib ole32.lib
!IFDEF CPU
!IFNDEF NO_BUFFEROVERFLOWU
LIBS = $(LIBS) bufferoverflowU.lib
!ENDIF
!ENDIF
!IFNDEF O
!IFDEF CPU
O=$(CPU)
!ELSE
O=O
!ENDIF
!ENDIF
!IF "$(CPU)" == "AMD64"
MY_ML = ml64 -Dx64
!ELSEIF "$(CPU)" == "ARM"
MY_ML = armasm
!ELSE
MY_ML = ml
!ENDIF
!IFDEF UNDER_CE
RFLAGS = $(RFLAGS) -dUNDER_CE
!IFDEF MY_CONSOLE
LFLAGS = $(LFLAGS) /ENTRY:mainACRTStartup
!ENDIF
!ELSE
!IFNDEF NEW_COMPILER
LFLAGS = $(LFLAGS)
!ENDIF
CFLAGS = $(CFLAGS) -Gr
LIBS = $(LIBS) user32.lib advapi32.lib shell32.lib
!ENDIF
!IF "$(CPU)" == "ARM"
COMPL_ASM = $(MY_ML) $** $O/$(*B).obj
!ELSE
COMPL_ASM = $(MY_ML) -c -Fo$O/ $**
!ENDIF
CFLAGS = $(CFLAGS) -nologo -c -Fo$O/ -WX -EHsc -Gy -GR-
!IFDEF MY_STATIC_LINK
!IFNDEF MY_SINGLE_THREAD
CFLAGS = $(CFLAGS) -MT
!ENDIF
!ELSE
CFLAGS = $(CFLAGS) -MD
!ENDIF
!IFDEF NEW_COMPILER
CFLAGS = $(CFLAGS) -W4 -GS- -Zc:forScope
!ELSE
CFLAGS = $(CFLAGS) -W3
!ENDIF
CFLAGS_O1 = $(CFLAGS) -O1
CFLAGS_O2 = $(CFLAGS) -O2
LFLAGS = $(LFLAGS) -nologo -OPT:REF -OPT:ICF
!IFNDEF UNDER_CE
LFLAGS = $(LFLAGS) /LARGEADDRESSAWARE
!ENDIF
!IFDEF DEF_FILE
LFLAGS = $(LFLAGS) -DLL -DEF:$(DEF_FILE)
!ENDIF
PROGPATH = $O\$(PROG)
COMPL_O1 = $(CC) $(CFLAGS_O1) $**
COMPL_O2 = $(CC) $(CFLAGS_O2) $**
COMPL_PCH = $(CC) $(CFLAGS_O1) -Yc"StdAfx.h" -Fp$O/a.pch $**
COMPL = $(CC) $(CFLAGS_O1) -Yu"StdAfx.h" -Fp$O/a.pch $**
all: $(PROGPATH)
clean:
-del /Q $(PROGPATH) $O\*.exe $O\*.dll $O\*.obj $O\*.lib $O\*.exp $O\*.res $O\*.pch
$O:
if not exist "$O" mkdir "$O"
$(PROGPATH): $O $(OBJS) $(DEF_FILE)
link $(LFLAGS) -out:$(PROGPATH) $(OBJS) $(LIBS)
!IFNDEF NO_DEFAULT_RES
$O\resource.res: $(*B).rc
rc $(RFLAGS) -fo$# $**
!ENDIF
$O\StdAfx.obj: $(*B).cpp
$(COMPL_PCH)

Answer 1

Brian Wilson's guide shows how to do this. The guide is for VS2010, but it worked fine for me in VS2012.
The main steps:
Set up the environment variables using "c:\Program Files (x86)\Microsoft Visual Studio 11.0\Common7\Tools\vsvars32.bat"
Edit C:\7zsrc\CPP\Build.mak to remove "-OPT:NOWIN98" from line 34
Run C:\7zsrc\CPP\7zip\nmake NEW_COMPILER=1 MY_STATIC_LINK=1
Note the third step targets the makefile in the 7zip subdirectory instead of the Build.mak that you are targeting.
A number of executable are created. You may be interested in C:\7zsrc\CPP\7zip\UI\Client7z\O\7z.exe

Answer 2

You must compile some "makefile" instead.