Install error on Windows Vista

[toto]

Hello,

I'm trying to install Tahoe on Windows Vista but when I execute "C:\Python27\python setup.py build" I get this error :
Setting up environment to run scripts for the current user...

Already done: associate the filetype .pyscript with Python.File for the current user.

Already done: add .pyscript to the user environment variable PATHEXT.

Already done: add .pyw to the user environment variable PATHEXT.

# C:\Python27\lib\distutils\cygwinccompiler.pyc matches C:\Python27\lib\distutils\cygwinccompiler.py

import distutils.cygwinccompiler # precompiled from C:\Python27\lib\distutils\cygwinccompiler.pyc

# C:\Python27\lib\distutils\unixccompiler.pyc matches C:\Python27\lib\distutils\unixccompiler.py

import distutils.unixccompiler # precompiled from C:\Python27\lib\distutils\unixccompiler.pyc

cc1plus.exe: erreur: unrecognized command line option '-mno-cygwin'

error: Setup script exited with error: command 'gcc' failed with exit status 1
I've installed Python 2.7, mingw-get-inst-20120426, Cygwin last version and done all that is described here :

​https://tahoe-lafs.org/trac/tahoe-lafs/wiki/AdvancedInstall#point9.4[[BR]]

Mingw version :

C:\tahoe-lafs>gcc -v

Utilisation des specs internes.

COLLECT_GCC=gcc

COLLECT_LTO_WRAPPER=c:/mingw/bin/../libexec/gcc/mingw32/4.6.2/lto-wrapper.exe[[BR]]

Target: mingw32

Configuré avec: ../gcc-4.6.2/configure --enable-languages=c,c ++,ada,fortran,objc,obj-c++ --disable-sjlj-exceptions --with-dwarf2 --enable-shared --ena ble-libgomp --disable-win32-registry --enable-libstdcxx-debug --enable-version-specific-runtime-libs --build=mingw32 --prefix=/mingw

Modèle de thread: win32

gcc version 4.6.2 (GCC)

Thank you for your help