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Subject: Re: Return unconstrained types in ZFP
From: rrr.eee.27@gmail.com
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Date: 2012-12-02T10:27:57-08:00
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On Sunday, December 2, 2012 3:38:22 AM UTC+1, Rego, P. wrote:
> Dear fellows,=20
>=20
> I am trying to implement, for an ATmega2560 (Arduino Mega) micro-controll=
er using ZFP in GNAT-AVR, an USART unconstrained Get string like


Returning unconstrained objects from functions requires the so-called secon=
dary stack in GNAT.  If you want to use it you need the files s-secsta.ad(s=
|b) and s-stoele.ad(s|b).  (Then you cannot call your run time system a "ze=
ro footprint" system anymore as the footprint is > 0)

BTW, AVR-Ada already provides the secondary stack for those who want to use=
 this Ada feature without looking at the generated Asm.  The ATmega2560 is =
relatively big, you probably dont have to care.  Unconstrained arrays are n=
ice syntax sugar.  If you are short on RAM or flash (I always am) you don't=
 want to use that feature, however.

HTH
    Rolf