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 Path: eternal-september.org!reader01.eternal-september.org!reader02.eternal-september.org!news.eternal-september.org!mx02.eternal-september.org!feeder.eternal-september.org!aioe.org!.POSTED!not-for-mail From: "Dmitry A. Kazakov" Newsgroups: comp.lang.ada Subject: Re: GNAT.Serial_Communication and Streams Date: Wed, 25 Nov 2015 09:52:12 +0100 Organization: cbb software GmbH Message-ID: <176k4qaseow2w.1cckz2yfyq3m2.dlg@40tude.net> References: <1pl8set3ocirg.1v92rqtxaoq3z$.dlg@40tude.net> <69b11711-7f19-4b0f-9a5e-66b873a72cc2@googlegroups.com> Reply-To: mailbox@dmitry-kazakov.de NNTP-Posting-Host: p9a8jKAGz0rpkSSbWxF1gQ.user.speranza.aioe.org Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit X-Complaints-To: abuse@aioe.org User-Agent: 40tude_Dialog/2.0.15.1 X-Notice: Filtered by postfilter v. 0.8.2 Xref: news.eternal-september.org comp.lang.ada:28535 Date: 2015-11-25T09:52:12+01:00 List-Id: On Tue, 24 Nov 2015 22:24:48 -0800 (PST), Shark8 wrote: > On Tuesday, November 24, 2015 at 3:45:52 AM UTC-7, Dmitry A. Kazakov wrote: >> On Tue, 24 Nov 2015 10:28:20 +0000, Simon Wright wrote: >>> I wholly agree with "trust, but verify", though! >> >> You can verify given compiler for given machine. You cannot do that in >> general. > > Whyever not? Because you need a compiler to verify things it does. A portable program is a program exposing the same behavior for a set of compilers some of which may not yet exist. Same applies to the target machines. [ skipping compiler validation techniques ] You can validate compilers only against mandated behavior. Stream attribute to produce same sequences of stream elements across all Ada compilers is just not required. -- Regards, Dmitry A. Kazakov http://www.dmitry-kazakov.de