Question

I understand that the fastest and the most lightweight binary at windows generate only msvc compiler

Express edition of msvc is free
http://www.microsoft.com/express/windows/

but how to use cl.exe instead of g++.exe?

is it possible in common by using GNU make variables produce makefiles which will works with cl.exe and g++?

for example
http://msdn.microsoft.com/en-us/library/19z1t1wy(v=VS.80).aspx

export CC = path/to/cl.exe
export COMPILE_WITHOUT_LINKING = /c
export OBJECT_FILE = /Fo

or is conception of cl and g++ very different?

Answer 1

Of course you can. cl.exe is just another command line tool. However, the two compilers differ in more advanced usage, so it might be difficult to use cl.exe as a drop-in replacement for g++.