X-Recipient: archive-cygwin@delorie.com X-SWARE-Spam-Status: No, hits=-0.4 required=5.0 tests=AWL,BAYES_20,RCVD_IN_DNSWL_NONE,T_RP_MATCHES_RCVD X-Spam-Check-By: sourceware.org Message-ID: <85C4645B18FA4D37852D725436AB741B@desktop2> From: "Sisyphus" To: "marco atzeri" , Cc: "N. C." References: <20110409160524.GA29135@ednor.casa.cgf.cx> In-Reply-To: Subject: Re: newlib and long-double question Date: Sun, 10 Apr 2011 20:25:01 +1000 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original Content-Transfer-Encoding: 7bit X-IsSubscribed: yes Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@cygwin.com Mail-Followup-To: cygwin@cygwin.com Delivered-To: mailing list cygwin@cygwin.com ----- Original Message ----- From: "marco atzeri" >> On a Linux system that I have access to, I see that those functions >> are in /lib/libm.* but cygwin's /lib/libm.* still seems to lack them. >> Is there any work around or alternate version ofthis lib that actually >> has these functions. I honestly do not mean to be rude, but how >> difficult is it to impliment these functions which seem so common in >> most unix-like systems? > > It is not overcomplicated to implement it, but it takes time and > someone to do it. > When I implemented all the complex functions (cabs, ccos..) I spent one > month > to make it right. A more capable guy will take less surely, but as > mention I see little > benefit moving from 64 to 80 bits so I was not interested to implement it. > I sense an opportunity here to plug (to the op) the Math::MPFR perl module - for which the gmp and mpfr C libraries are required. I guess one could also use Math::BigFloat, but I assume the op has already considered (and rejected) that option - the performance hit incurred by its use has always discouraged me. Perhaps he has also already considered and rejected Math::MPFR, but it seems to me to be by far the best option for achieving added precision with floating point numbers - at least until such time as building perl with -Duselongdouble has been facilitated. Cheers, Rob -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple