From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 3693 invoked by alias); 9 Apr 2011 21:10:35 -0000 Received: (qmail 3685 invoked by uid 22791); 9 Apr 2011 21:10:34 -0000 X-SWARE-Spam-Status: No, hits=-2.6 required=5.0 tests=BAYES_00,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FROM,RCVD_IN_DNSWL_LOW,TW_CG,T_TO_NO_BRKTS_FREEMAIL X-Spam-Check-By: sourceware.org Received: from mail-gw0-f43.google.com (HELO mail-gw0-f43.google.com) (74.125.83.43) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Sat, 09 Apr 2011 21:10:27 +0000 Received: by gwj21 with SMTP id 21so1973823gwj.2 for ; Sat, 09 Apr 2011 14:10:27 -0700 (PDT) MIME-Version: 1.0 Received: by 10.147.106.13 with SMTP id i13mr3312852yam.12.1302383425571; Sat, 09 Apr 2011 14:10:25 -0700 (PDT) Received: by 10.147.171.4 with HTTP; Sat, 9 Apr 2011 14:10:25 -0700 (PDT) In-Reply-To: References: <20110409160524.GA29135@ednor.casa.cgf.cx> Date: Sun, 10 Apr 2011 10:25:00 -0000 Message-ID: Subject: Re: newlib and long-double question From: "N. C." To: cygwin@cygwin.com Content-Type: text/plain; charset=ISO-8859-1 X-IsSubscribed: yes Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@cygwin.com Mail-Followup-To: cygwin@cygwin.com X-SW-Source: 2011-04/txt/msg00132.txt.bz2 On 4/9/11, marco atzeri wrote: > On Sat, Apr 9, 2011 at 6:05 PM, Christopher Faylor wrote: >> On Sat, Apr 09, 2011 at 08:20:13AM -0700, Necro Cow wrote: >>>Hello. >>> >>>I have recently discovered that the cygwin version I am using (1.7.7) >>>doesn't support many long-double function, like sqrtl, modfl, frexpl, >>>etc. >>> >>>I have been reading on newlib's website, sourceware.org/newlib, that >>>as of version 1.18.0, such long-double functions are now supported. >>>(http://sourceware.org/ml/newlib/2009/msg01135.html) > > further the newlib announce says: > * long double math routines added for platforms where LDBL == DBL > > so in reality you gain no additional performance on the double. > >>> >>>What I can't seem to find out is, what version of newlib is in the >>>newest release of cygwin, and if it has this better support for >>>long-double functions. >> >> Cygwin uses whatever is in the newlib tree as of its release date. That >> means that since Cygwin 1.7.7-1 was released in August 2010* it would >> incorporate any newlib changes from 2009. That doesn't mean that we would >> export every single thing that newlib provides, however. If functionality >> is missing that means that no one has taken the time to get it working in >> the Cygwin DLL. >> >> cgf >> >> *http://sourceware.org/ml/cygwin-announce/2010-08/msg00035.html >> > > on 1.7.8 most of the missing "double" function were added > http://sourceware.org/ml/cygwin-announce/2011-03/msg00000.html > > I thought to implement also the long double but as doubles are 64 bit > and long doubles are just 80 bits on windows, I found the effort not worth. > > Marco I have fully updated my cygwin tp 1.7.9(0.237/5/3) and I still get this error when I try to build Perl (5.12.3 in this case but same with other versions) with uselongdouble enabled in the Configure script, which fails with: *** You requested the use of long doubles but you do not seem to have *** the following mathematical functions needed for long double support: *** sqrtl modfl frexpl *** Please rerun Configure without -Duselongdouble and/or -Dusemorebits. *** Cannot continue, aborting. 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? Or did nothing not get updated when I updated cygwin? Thanks, M. C -- 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