cannot compute suffix of object files

[booleandomain]

Hello,

I'm trying to compile gcc-4.4.

I configured it as follows: --build=x86_64-pc-linux-gnu 
--host=x86_64-pc-linux-gnu --target=x86_64-pc-linux-gnu --enable-languages=c

Configuring works fine. Making doesn't. It stops with the following 
error message:

[...]
configure: error: cannot compute suffix of object files: cannot compile
See 'config.log' for more details.
make[1] *** [configure-target-libgcc] Error 1
[...]

In config.log I found these error messages:

[...]
conftest.c:12:19: error: ppl_c.h: no such file or directory
[...]
conftest.c:12:25: error: cloog/cloog.h: no such file or directory
[...]

I tried to reconfigure gcc with --without-ppl --without-cloog but make 
fails again with the very same error.

What could i do?

Thanks.