>Could you explain some of the techinical difficulties involved in
>porting such a complex product between various versions of Unix?
>
>Since Rational's reference platform is Solaris (AFAIK), what makes it
>so difficult to port from Solaris to <insert Unix variant here>.
>
>What, in your opinion, would be the difficulty in porting such a
>product to Linux, and do you know if Rational is getting a demand
>from their customers to do so?
>
>Side note: I find it interesting that they're getting enough demand
> for Tru64, but not Linux?!
Just guessing here, based on ancient memories:
I suspect that the challenge did not really
come from the OS aspect of the porting effort,
but rather from the change in CPU architecture,
changing simultaneously to a new instruction
set and also from 32bits to 64bits.
IIRC, you can direct Purify to commit certain
unnatural (ie. very CPU-specific and object file
specific) acts in its efforts to instrument your
program (hint: source code not always necessary)
and that part of the portation would involve
rather more than a simple recompilation...
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