Install:

mingw

boost

cmake

git

Assuming boost is in c:\program files\boost\boost_1_61_0 and mingw is in c:\mingw

start cmd.exe

> cd c:\program files\boost\boost_1_61_0

> set PATH=c:\mingw\bin

> bootstrap gcc

> .\b2 --build-dir=c:\boost-mingw toolset=gcc link=static runtime-link=static variant=release --with-system --with-thread

leave cmd window open

start git bash

> cd /c

> git clone http://github.com/slic3r/slic3r

> cd slic3r

> git checkout cppsvg

close git bash when done

make sure c:\mingw\bin is part of the Path system variable, add it otherwise

start cmake gui

source code: c:\slic3r\src

build directory: c:\slic3r\build

click configure, select "mingw makefiles" from list, select "default native compilers", click finish

click generate

close cmake gui

alternatively, do it from command line:

cmake ..\src -G "MinGW Makefiles" -DBOOST_ROOT="c:\program files\boost\boost_1_61_0"

(in case cmake can't find the libs, -DBoost_DEBUG=1 and -DBoost_COMPILER=-mgw46 are useful)

go back to cmd window

> cd c:\slic3r\build

> mingw32-make.exe

might be mingw64 on 64-bit setup, I'm not sure

The resulting slic3r.exe is the target executable, it has no dependencies except windows system libraries (kernel32 and msvcrt)