> It seems even gcc3.2 and 3.3 must not be ABI compatible.

Oh really, and I was hoping, that starting with gcc3, C++ would be ABI
compatible (of course only as long as the API remains the same) :-(

> Hard, to call this freedom of choice ;)  Shurely the most relyable way
> >from user side is to get specs about interfaces.

I guess it's a very similar situation as with Windows GDI printers. The
manufacturers attempt to make the instrument as dumb as possible and to do
the more complicated computations in software on the host, since this makes
the devices cheaper.

While e.g. a Xrite DTP41 delivers ready-to-use measurements over the
(documented) V.24 interface, I suspect that the Spectrocam has rather only a
low-level interface to fire the flash tube, an interface to the instrument's
ADC, to the EEPROM, but probably not too much more. And everything else
(calibration stuff, deconvolution, etc.) is presumably done in the SDK
library.

With this approach, the interface to the instrument's hardware basically
degrades to an "internal interface" and only the manufacturer's
hardware+software together provide the full functionality of the instrument.
Similar to GDI printers, the manufacturers appearently rather don't like to
document and publish such "internal" interfaces.

Regards,
Gerhard

-- 
NEU : GMX Internet.FreeDSL
Ab sofort DSL-Tarif ohne Grundgeb�hr: http://www.gmx.net/dsl



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