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From: Simon Wright <simon@pushface.org>
Newsgroups: comp.lang.ada
Subject: Re: How to get Ada to =?utf-8?Q?=E2=80=9Ccross?= the =?utf-8?Q?ch?=
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Date: Sun, 06 May 2018 11:16:12 +0100
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Xref: reader02.eternal-september.org comp.lang.ada:52036
Date: 2018-05-06T11:16:12+01:00
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Niklas Holsti <niklas.holsti@tidorum.invalid> writes:

> On 18-05-06 11:02 , Simon Wright wrote:
>> Dennis Lee Bieber <wlfraed@ix.netcom.com> writes:
>>
>>> 	And for the avionics I have been exposed to -- you do not use
>>> constructs that require the secondary stack... Same reason -- size
>>> not known until run-time.
>>
>> Just for interest, I just rebuilt AdaCore's Certyflie with the
>> restriction No_Secondary_Stack; no problems.
>
> Just from curiosity: did you check that the linked program did not
> include any secondary-stack functions? I've found that some versions
> of GNAT Pro for the SPARC/LEON do not fully obey the
> No_Secondary_Stack restriction in the gnat.adc file.

The map file only shows that s-secsta was linked because of
s-tarest. Maybe the map only shows the first reason for linking. I see
that although the main crazyflie application doesn't use the secondary
stack, the support library does; and sure enough, it's string
catenation, in one place, in the logging subsystem. Could have been
avoided by careful assignment to slices of a fixed string.