compiling GCC 4.2.1 tarball using GCC 3.2.3

[Muthiah Annamalai]

Hello there,
I am trying to compile GCC 4.2.1 using GCC 3.2.3. Even after massaging
some of the Makefiles, and warning flags etc, I run into certain symbols
like SIZEOF_REAL which arent converted from the #defines.

For the GNU/Linux 2.4.21 machine, I was able to install GCC 3.4.6, on
a local path.

I want to know what is the min version of GCC I want to install, to compile
GCC 4.x. My goal is not to have GCC cvs, precisely, but to use GCC 4.x.

Please advise.

Thanks,
Muthiah