Date: Fri, 2 Nov 2012 06:07:04 -0700 From: Steve Kargl <sgk@troutmask.apl.washington.edu> To: David Chisnall <theraven@freebsd.org> Cc: Greg 'groggy' Lehey <grog@freebsd.org>, Erich Dollansky <erichfreebsdlist@ovitrap.com>, freebsd-current@freebsd.org Subject: Re: FORTRAN vs. Fortran (was: November 5th is Clang-Day) Message-ID: <20121102130704.GA79087@troutmask.apl.washington.edu> In-Reply-To: <0555D6CB-5DB0-4C48-9D4D-8393978CBB1E@FreeBSD.org> References: <20121102032945.GF65074@lor.one-eyed-alien.net> <20121102045917.GA77204@troutmask.apl.washington.edu> <20121102122103.4afc93e5@X220.ovitrap.com> <20121102060818.GB48921@eureka.lemis.com> <CAOgwaMtgUUBeHzd5U6m03Dts5gYmjuCssV%2B2Bm_112yrX5BgyA@mail.gmail.com> <0555D6CB-5DB0-4C48-9D4D-8393978CBB1E@FreeBSD.org>
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On Fri, Nov 02, 2012 at 08:25:58AM +0000, David Chisnall wrote: > On 2 Nov 2012, at 08:18, Mehmet Erol Sanliturk wrote: > > > Very many years ago , when 2010 was a very distant future , I do not > > remember the name of the writer , who wrote approximately : > > > > "In 2010 , there will be Fortran , but a Fortran which may be different ." > > I remember a talk in the mid '90s by someone from Sun's HPC team > where he said 'I don't know what the syntax or semantics of the > language we will be using for HPC in 20 years time will be, but > I do know one thing about it: it will be called Fortran' > > Although the response to GCC's recent decision to drop support > for Fortran 77 showed that that language will probably be called Fortran 77... > GCC did not drop Fortran 77. When GCC moved from the 3.x series to the 4.x series, it introduced the use of gimple and tree-ssa. No one ported g77 to use gimple and tree-ssa, so g77 was replaced by a completely new frontend, which is called gfortran and started life as a Fortran 95 compiler. One admirable objective of J3, the Fortran standardization committee, is that it strives for backwards compatibility to previous standards. So, if you have a valid Fortran 77 code, it will in all likelihood be a validate Fortran 2008 program. Fortran 95 deleted 10 features from the language; however, every compiler that I've used still supports those features. In regards to HPC and Fortran, Fortran 2008 introduced this wonderful feature called co-arrays. One can read about gfortran's progress with its implementation of co-arrays at http://gcc.gnu.org/wiki/Coarray -- Steve
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