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=-0.3 required=5.0 tests=BAYES_00, REPLYTO_WITHOUT_TO_CC autolearn=no 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!news.glorb.com!newsgate.cistron.nl!transit.news.xs4all.nl!xs4all!post.news.xs4all.nl!not-for-mail Message-Id: <461a279f$0$79139$e4fe514c@news.xs4all.nl> From: Rob Veenker Subject: Re: GNAT verses A# for soft-realtime system Newsgroups: comp.lang.ada Reply-To: veenker@xs4all.nl Date: Mon, 09 Apr 2007 13:46:39 +0200 References: <4uudnaJ7BJK8g4XbnZ2dnUVZ_t-mnZ2d@comcast.com> <2IWRh.39480$_c5.25338@attbi_s22> User-Agent: KNode/0.9.2 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7Bit NNTP-Posting-Host: 85.223.48.159 X-Trace: 1176119199 news.xs4all.nl 79139 veenker/[::ffff:85.223.48.159]:5944 X-Complaints-To: abuse@xs4all.nl Xref: g2news1.google.com comp.lang.ada:14842 Date: 2007-04-09T13:46:39+02:00 List-Id: Chip and Allie Orange wrote: > > "Jeffrey R. Carter" wrote in message > news:2IWRh.39480$_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 You may want to take a look at http://www.adacore.com/wp-content/files/attachments/adacore_news_1106_web.pdf regards, Rob Veenker