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Re: 3.4.3 unable to compile 2.95.3


Edward Peschko <esp5@pge.com> wrote:

> I just noticed that gcc-3.4.3 is not particularly good at compiling
> old versions of gcc (I tried 2.95.3, and 3.3.5)


There might be good reasons. For instance, 2.95.3 could contain invalid C code
which was not diagnosed in older versions; or it could contain code which
triggers undefined behaviour (say, broken with respect to aliasing issues), but
the old optimizers were not able to exploit this. Or it could rely on old GNU
extensions that were since removed.

Giovanni Bajo


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