From -4485609731029006787 X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: f78e5,ea96cc047f6a22cc X-Google-Attributes: gidf78e5,public X-Google-ArrivalTime: 2001-08-10 16:04:01 PST Path: archiver1.google.com!newsfeed.google.com!newsfeed.stanford.edu!news-spur1.maxwell.syr.edu!news.maxwell.syr.edu!colt.net!dispose.news.demon.net!news.demon.co.uk!demon!mail2news.demon.co.uk!not-for-mail From: comeau@panix.com (Greg Comeau) Newsgroups: comp.std.c++ Subject: Re: extern "C" -- what is the intent? Date: Fri, 10 Aug 2001 23:03:39 GMT Organization: Comeau Computing; http://www.comeaucomputing.com Approved: Fergus Henderson , moderator of comp.std.c++ Message-ID: <9l1mej$3mf$1@panix3.panix.com> References: <090820010209154805%BobbySchmidt@mac.com> <3B733FA0.EFE7F4D5@wizard.net> Reply-To: comeau@comeaucomputing.com X-Trace: mail2news.demon.co.uk 997484625 mail2news:10767 mail2news mail2news.demon.co.uk X-Complaints-To: abuse@demon.net X-Mail2News-Path: news.demon.net!mulga.cs.mu.oz.au X-Authentication-Warning: mulga.cs.mu.OZ.AU: fjh set sender to devnull@stump.algebra.com using -f X-Robomod: STUMP, ichudov@algebra.com (Igor Chudov) Lines: 32 Xref: archiver1.google.com comp.std.c++:6935 In article , Francis Glassborow wrote: >In article <3B733FA0.EFE7F4D5@wizard.net>, James Russell Kuyper Jr. > writes >>It works the other way too; a >>name of a function or object defined in C++ can be used from C code, if >>the C++ definition declares it with C language linkage. > >And (and this is very important) the C compiler has a compaitble calling >sequence (most C compilers use the same one, but I do know ones that do >not, for example TopSpeed C - one of the very first compilers to get >full validation in the UK as ISO compliant) used name mangling to ensure >type safe linkage (and I believe this is allowed, just not required in >C) I think there's two statements being made there. The first is whether name mangling is required in C. I think that the answer, clearly, is no (although it's allowed, it's not a requirement). The other is whether type safe linkage is required in C. Certainly some form is. -- Greg Comeau Countdown to "export": December 1, 2001 Comeau C/C++ ONLINE ==> http://www.comeaucomputing.com/tryitout Tasty C99/C++ Combo: Dinkumware libs + Comeau Compilers == WOW!!! --- [ comp.std.c++ is moderated. To submit articles, try just posting with ] [ your news-reader. If that fails, use mailto:std-c++@ncar.ucar.edu ] [ --- Please see the FAQ before posting. --- ] [ FAQ: http://www.research.att.com/~austern/csc/faq.html ]