From mboxrd@z Thu Jan  1 00:00:00 1970
X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me
X-Spam-Level: 
X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00
	autolearn=unavailable autolearn_force=no version=3.4.4
Path: 
 eternal-september.org!reader01.eternal-september.org!feeder.eternal-september.org!aioe.org!.POSTED.PqIsDhab3Wyo9RPYjTDwrQ.user.gioia.aioe.org!not-for-mail
From: russ lyttle <lyttlec@removegmail.com>
Newsgroups: comp.lang.ada
Subject: Re: Why couldn't an operating system be written in ada
Date: Wed, 27 Feb 2019 09:06:15 -0500
Organization: Aioe.org NNTP Server
Message-ID: <q565gn$1m7n$1@gioia.aioe.org>
References: <4s8rud$9j3@tribune>
 <792fba1b-7a54-4d00-ae85-e6bd0737f001@googlegroups.com>
 <gdkcmuF7b4gU1@mid.individual.net> <q530vs$14jp$1@gioia.aioe.org>
 <q54i9q$idj$1@gioia.aioe.org> <q55h7q$m3j$1@gioia.aioe.org>
NNTP-Posting-Host: PqIsDhab3Wyo9RPYjTDwrQ.user.gioia.aioe.org
Mime-Version: 1.0
Content-Type: text/plain; charset=utf-8; format=flowed
Content-Transfer-Encoding: 7bit
X-Complaints-To: abuse@aioe.org
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101
 Thunderbird/60.5.1
X-Notice: Filtered by postfilter v. 0.9.2
Content-Language: en-US
Xref: reader01.eternal-september.org comp.lang.ada:55696
Date: 2019-02-27T09:06:15-05:00
List-Id: <comp.lang.ada>

On 2/27/19 3:20 AM, Dmitry A. Kazakov wrote:
> On 2019-02-27 00:32, lyttlec wrote:
> 
>> Often overlooked is that any "C-esque" POSIX compliant OS turns the
>> computer into a VAX. C was written to be easily translated into VAX
>> machine code and POSIX signals are all the original interrupts on a VAX.
>> If you have a CISC computer running VMS, C is your language.
> 
> What? In VMS you could call any OS primitive from *any* language without 
> POSIX garbage. DEC Ada worked perfectly well doing OS calls even if you 
> had no DEC C installed. Why would you ever use C if you had DEC Ada?
> 
> POSIX was nothing but one of many successful UNIX's moves to eliminate 
> more advanced OSes and crush OS market.
> 
> BTW, nobody sane would ever use POSIX layer on VMS. VMS API were 
> infinitely more advanced and comfortable to use in every possible 
> aspect. The same can be said about Windows. However bad Windows API 
> might be, POSIX Windows API is far worse and inferior. Even under Linux 
> POSIX is the last resort when nothing else helps.
> 
Thus my desire for an OS and Ada not dependent on any POSIX layer. Still 
digging, but it looks to me like gnat depends on a POSIX layer.
Is that true?