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From: Simon Wright <simon@pushface.org>
Newsgroups: comp.lang.ada
Subject: Re: When to use Bounded_String?
Date: Fri, 29 Dec 2017 09:11:14 +0000
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Date: 2017-12-29T09:11:14+00:00
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Mehdi Saada <00120260a@gmail.com> writes:

> GNAT is now the de-facto only fully-ceritified Ada 2012 compiler

GNAT implements a lot of Ada 2012, but definitely not all of the
optional parts; for instance, in both GNAT GPL 2017 and FSF GCC <= 8
Ada.Directories.Hierarchical_File_Names is
unimplemented. (Ada.Directories.Name_Case_Equivalence is also missing,
which I think is a mistake[1]).

Even the fully-supported versions available only to AdaCore customers
will have bugs/features, which may be OS-dependent; out of the box,
Linux & macOS systems have problems around ceiling locking (don't know
about Windows).

I don't know what form of certification is available/provided to AdaCore
customers, but it's likely to say something like "conforms to the ARM
with the following exceptions: <list of issues>".

None of this is intended as a criticism of AdaCore, who do an amazing
job!

[1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80869