gcc trunk - build issue

[M R Swami Reddy]

Hello,

I am building the gcc tools using the gcc trunk sources and my configuration is:
=
/gcc/trunk/configure --build=i686-pc-linux-gnu --host=i686-pc-mingw32 
--prefix=/release  --target=crx-elf --disable-nls --enable-languages=c,c++ 
--disable-libssp --with-mpfr=/scratch/mpfr-2.3.1/rel --with-gmp=/gmp/gmp-4.2.3/rel
===
But the above configuration itself failed with below error:
===
#ifdef __cplusplus
extern "C" void std::exit (int) throw (); using std::exit;
configure: exit 1
====

I have the i686-pc-mingw32 tools in PATH as:
===
> i686-pc-mingw32-gcc -v
  Thread model: win32
  gcc version 3.4.5 (mingw special)

Can any one suggest the reason for failure?

Thanks
Sawmi