Date: Fri, 3 Jan 2014 20:29:34 +0100 From: Baptiste Daroussin <bapt@FreeBSD.org> To: Tijl Coosemans <tijl@FreeBSD.org> Cc: Dimitry Andric <dim@FreeBSD.org>, Torbjorn Granlund <tg@gmplib.org>, FreeBSD Mailing List <freebsd-ports@freebsd.org> Subject: Re: Advice about /usr/ports/math/gmp Message-ID: <20140103192933.GB19702@ithaqua.etoilebsd.net> In-Reply-To: <20140103202306.0fd26803@kalimero.tijl.coosemans.org> References: <86d2k9uhw1.fsf@shell.gmplib.org> <9D1C0F6F-0683-430D-AB96-3E29693B3163@FreeBSD.org> <20140103183748.GA19702@ithaqua.etoilebsd.net> <20140103202306.0fd26803@kalimero.tijl.coosemans.org>
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--i0/AhcQY5QxfSsSZ Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Fri, Jan 03, 2014 at 08:23:06PM +0100, Tijl Coosemans wrote: > On Fri, 3 Jan 2014 19:37:48 +0100 Baptiste Daroussin wrote: > > On Fri, Jan 03, 2014 at 07:27:29PM +0100, Dimitry Andric wrote: > >> On 03 Jan 2014, at 17:53, Torbjorn Granlund <tg@gmplib.org> wrote: > >>> We are about to release GMP 5.2. > >>>=20 > >>> We have been forced to add three FreeBSD-related items to the releases > >>> notes: > >>>=20 > >>> * This release will not work on FreeBSD/amd64 7.x, 8.x or 9 series > >>> before 9.3 with a Haswell CPU or any other CPU which supports the > >>> BMI2 instructions. The reason is that the FreeBSD m4 command is n= ot > >>> correctly implemented. (Workaround: Use an older GMP release, or > >>> install GNU m4 from /usr/ports and tell GMP to use it.) > >>>=20 > >>> * This release will not work on FreeBSD/amd64 before version 10 using > >>> the 32-bit ABI. The reason is broken limits.h and broken dynamic > >>> linking. (Workaround: Use an older GMP release if using the 32-bit > >>> ABI on these FreeBSD releases is important.) > >>>=20 > >>> * This release will not work on FreeBSD/amd64 10.0 using the 32-bit > >>> ABI. The reason is bugs in the compiler 'clang'. (Workaround: > >>> Compiling gcc from /usr/ports might work, except that gcc depends = on > >>> GMP; we have not been able to test that workaround since > >>> FreeBSD/i386 10.0 does not work for us under KVM or Xen.) > >>>=20 > >>> The first item is a show-stopper. It would be possible to implement a > >>> workaround in GMP. We choose not to do that since (1) we adviced the > >>> FreeBSD project two years ago the m4 bug, and FreeBSD chose to make 4 > >>> releases without fixing m4, and (2) the fix is ugly, and (3) our use = of > >>> m4 which triggers the bug is actually part of a workaround for a brok= en > >>> assembler (to much complexity to maintain workarounds for workarounds= ). > >>>=20 > >>> The second item should not affect /usr/ports builds since they would = use > >>> the default 64-bit ABI on amd64 machines. > >>>=20 > >>> The third item is a show-stopper until clang is fixed. We have not b= een > >>> able to isolate this problem due to lack of time and due to a deeply > >>> malfunctioning filesystem of FreeBSD/i386 under KVM and Xen+NetBSD. = We > >>> don't have any more information about these bugs. > >>>=20 > >>>=20 > >>> We do not plan to implement workarounds for the above bugs for GMP 5.= 2.x > >>> for any x. I would advice that you stick with GMP 5.1.3. > >>=20 > >> Uhm, if you provide approximately zero information about these supposed > >> "bugs", how do you expect anyone to help fixing them? > >=20 > > In particular concerning m4, I'd like to hear what is buggy and how, ou= r m4 do > > respect the m4 specs: > > http://pubs.opengroup.org/onlinepubs/9699919799/utilities/m4.html plus = it has > > support for some (all?) of the gnu extension via the -g option. > >=20 > > If anything is buggy I would like to hear about it and fix. >=20 > The first item is http://www.freebsd.org/cgi/query-pr.cgi?pr=3D166994 Oh great I see, I forgot to mfc it. Thanks for having merge it. > The second item is about compiling with -m32. We only fully implemented > that in FreeBSD 10. > The third item I don't know anything about. regards, Bapt --i0/AhcQY5QxfSsSZ Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.15 (FreeBSD) iEYEARECAAYFAlLHD50ACgkQ8kTtMUmk6EzY9wCgk/JgrmaVgLg7p8WQBN/4cyUs zMcAn0CoDzZOsU6TH1GDR7E3wBvJl1QJ =sA6e -----END PGP SIGNATURE----- --i0/AhcQY5QxfSsSZ--
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