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,FREEMAIL_FROM autolearn=ham autolearn_force=no version=3.4.4 X-Google-Thread: 103376,f2aa0ddde84d1b0a X-Google-Attributes: gid103376,public X-Google-Language: ENGLISH,ASCII-7-bit Path: g2news1.google.com!news2.google.com!border1.nntp.dca.giganews.com!nntp.giganews.com!local01.nntp.dca.giganews.com!nntp.comcast.com!news.comcast.com.POSTED!not-for-mail NNTP-Posting-Date: Sun, 08 Apr 2007 10:14:08 -0500 From: "Chip and Allie Orange" Newsgroups: comp.lang.ada References: <4uudnaJ7BJK8g4XbnZ2dnUVZ_t-mnZ2d@comcast.com> <2IWRh.39480$_c5.25338@attbi_s22> Subject: Re: GNAT verses A# for soft-realtime system Date: Sun, 8 Apr 2007 11:11:28 -0400 X-Priority: 3 X-MSMail-Priority: Normal X-Newsreader: Microsoft Outlook Express 6.00.2900.3028 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3028 X-RFC2646: Format=Flowed; Response Message-ID: NNTP-Posting-Host: 68.35.222.233 X-Trace: sv3-q9MYR0cey371jPf/oIYbu1HYKRxhJ9zR1dSYRDYps/d+aYzzSoOVn0AqZdBmcH3MMltmR5CMqZfq/0f!Icieklyd5+BMq2iM6jg6W9UuxGBnjLw+Je9wbve3akKrfJt7Wqilj+GPeJsxDEuLRvuqo+YDwxIj!vxf45/QORVxAtZ6m6e+4oBX/6xBq7g== X-Complaints-To: abuse@comcast.net X-DMCA-Complaints-To: dmca@comcast.net X-Abuse-and-DMCA-Info: Please be sure to forward a copy of ALL headers X-Abuse-and-DMCA-Info: Otherwise we will be unable to process your complaint properly X-Postfilter: 1.3.34 Xref: g2news1.google.com comp.lang.ada:14836 Date: 2007-04-08T11:11:28-04:00 List-Id: "Jeffrey R. Carter" wrote in message news:2IWRh.39480$_c5.25338@attbi_s22... > Chip and Allie Orange wrote: >> >> I can purchase a Windows-based PC robot for $5k, and I'd like to learn to >> program it to do autonomous functions (including realtime image >> analysis). >> >> I have a choice of GNAT or A# for my programming environment. > > A# is a version of GNAT that targets .net. > > If you're willing to pay $5k for your robot, you might be willing to pay > 10% or less of that for a supported compiler. AdaCore doesn't provide > anything in that price range, but both Aonix and RR SW do. > > Whether you go with a supported compiler, or with a free version of GNAT > (including A#), you have a couple of decisions to make. One is which > version of Ada you want to use. Only GNAT GPL implements most of the most > recent version; A# and the commercial compilers implement Ada 95. > > The other is the target platform you want to use. Apparently you have a > Windows target but could also use .net on top of that. Using .net would > constrain you to A#. > > These are not decisions we can make for you. GNAT GPL has some errors in > the new features, but if you're interested in learning the new version of > Ada, that might be the way you want to go. If you'd rather have support > and Ada 95 is acceptable, a commercial compiler would probably be your > choice. If you'd like to use existing .net SW, A# would be the way to go. > Thanks Jeff. I am constrained by an NDA from saying why .net offers me some advantages, but it does. You've helped answer one of my questions, in that I now understand A# is Ada95, while GNAT/GPL is Ada2005. I was interested in Ada2005, as long as I'm bothering to throw my time and money into this. My question was also, does .net have something about it that makes it a poor environment for soft real-time systems? Especially, does it produce code that's noticeably slow, or that garbage collects in some way that would make it less than desirable for real-time systems with very limited CPU resources? Do the additional features of 2005 target real-time systems? Finally, are the products from compiler vendors (Aionix and RR) that much better than GNAT/GPL? Thanks again. Chip