How to compile old GCC version using new GCC version?

[Jiang Alan]

We have a project(modification gcc to support some feature) based on
GCC 3.0.2. I recently installed Redhat 8.0 which using GCC 3.2 as its
default compiler.


   When I compiled our project source code (a modification of GCC
3.0.2) on Redhat 8.0, I got some error about the c++ library GCC 3.0.2
using. It is all right using GCC 2.96.

   How can I use GCC 3.2 to compile our project?


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