ccache and autotools

[Jean-Eric Cuendet]

Hi,
I have a C++ project with a lot of source files (~4000).
I'd like to use ccache to speed recompilation of the project.
I can't since ccache doesn't support -MT flag to gcc
What does EXACTLY this flags?
Is it possible to tell autoconf/automake to not use -MT when generating the Makefiles?
Thanks
-jec