Re: [gentoo-user] Gcc compiling, is this normal?

[Alan McKinnon]

On 12/05/2013 23:37, David Relson wrote:
>> [1]  The logic goes something like this: it's a compiler, so the code
>> > it produces must be consistently identical for identical inputs. So,
>> > the current compiler builds gcc, giving version Y built by version X.
>> > That instance of gcc in turn builds a gcc, giving version Y built by
>> > version Y.
> Haven't you left out the third compile?
>
> Let me rephrase the 3 builds.
>
> 1) gcc-X builds gcc-Y giving gcc-Y1
> 2) gcc-Y1 builds gcc-Y giving gcc-Y2
> 3) gcc-Y2 builds gcc-Y giving gcc-Y3
>
> gcc-Y1 and gcc-Y2 are likely to be different (since they were build by
> gcc-X and gcc-Y which are likely to have optimizations).
>
> gcc-Y2 and gcc-Y3 should be identical (since both were built by gcc-Y)
>
>> >

Yeah, I think you're right. Thanks for that.

Like I said, I'm fuzzy on the details after all these years. My
intention was not to be completely accurate and correct, it was more to
get the general idea across to Dale

-- 
Alan McKinnon
alan.mckinnon@×××××.com