I am trying to build bjam.exe from trunk on windows with mingw/gcc, i am using gcc-4.7.2.

set path=c:\Mingw\bin;%PATH%
bootstrap.bat mingw

Building Boost.Build engine
builtins.c: In function 'builtin_readlink':
builtins.c:1879:39: erreur: 'FSCTL_GET_REPARSE_POINT' undeclared (first use in t
his function)
builtins.c:1879:39: note: each undeclared identifier is reported only once for e
ach function it appears in

Failed to build Boost.Build engine.
Please consult bootstrap.log for furter diagnostics.
It was ok in 1.54 and this seems to be related to symlinks.
Is this a bug or should i upgrade my gcc ?