|Bill Allombert on Mon, 15 Aug 2011 00:59:21 +0200|
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|Re: MacOs X Lion compiler and PARI|
On Sat, Aug 06, 2011 at 09:15:01AM -0700, William Stein wrote: > On Fri, Aug 5, 2011 at 5:30 AM, Bill Allombert > <Bill.Allombert@math.u-bordeaux1.fr> wrote: > > Hello PARI developers, > > > > I received reports that MacOs X Lion default compiler is unable to compile PARI > > correctly. Precisely this version: > > > > GNU compiler version 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2335.15.00) > > > > So far I got two kind of issues: > > With --with-gmp, PARI build, but the resulting code is broken (see bug #1222) > > With --without-gmp, PARI fails to build (see > > <http://pari.math.u-bordeaux.fr/buildlogs/dac98dec-af1e-4e54-97ba-f001b69bf7a9>) > > > > Concerning, the first issue, I do not have access to such a system and in any > > case I cannot fix Apple compiler, so I would appreciate if one of you Mac OS X > > users would report the problem to Apple. > To encourage porting efforts to Lion, I setup a computer with the > latest OS and XCode 4.1 on it. Thanks a lot, this has allowed to confirm that the problem is a compiler issue that cause the file 'src/kernel/none/gcdll.c' (included in mp.c) to be miscompiled with -O1 and up. The symptom is that bezout(7,2) return [0, 1, 2] instead of [1, -3, 1]. > By the way, Mike Hansen was able to build the PARI that is in Sage > (along with its dependency MPIR) on this machine and it works: Did you use the default compiler ? Did you use the default optimization level ? Cheers, Bill.