[testsuite, ada] Convert ACATS to DejaGnu (PR testsuite/37703)

[Rainer Orth]

Arnaud Charlet <charlet@adacore.com> writes:

> OK, if we're talking about special switches (such as -gnato and
> -fstack-check) corresponding to *.lst files, then this is OK.
>
> Still, having -O2 handled globally by the script would be more desirable.

Agreed.  This is a shortcoming of dg-options: there should be an
alternative tag that allows to add options to the default instead of
replacing them.  I'll certainly look at that, since this has utility
beyond Ada.

	Rainer

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Rainer Orth, Center for Biotechnology, Bielefeld University