GCC Compiling error under MinGW / MSYS

[lol37 lol37]

Hello there,
i've got a problem at the nearly end of the compilation, here is what
i get : configure: error: --enable-cxx-flags needs compiler flags as
arguments
i have configured gcc with the flag --enable-cxx-flags='-fno-
function-sections -fno-data-sections'
i'm compiling gcc 4.6.1 under MinGW with 4.5.2 version of gcc, is that
because theses flags aren't implemented ?
thanks for replys.
Sam.