Date: Fri, 3 Jan 2014 19:27:29 +0100 From: Dimitry Andric <dim@FreeBSD.org> To: Torbjorn Granlund <tg@gmplib.org> Cc: FreeBSD Mailing List <freebsd-ports@freebsd.org> Subject: Re: Advice about /usr/ports/math/gmp Message-ID: <9D1C0F6F-0683-430D-AB96-3E29693B3163@FreeBSD.org> In-Reply-To: <86d2k9uhw1.fsf@shell.gmplib.org> References: <86d2k9uhw1.fsf@shell.gmplib.org>
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--Apple-Mail=_B1954B60-B2CC-4E3B-A719-15342053E2AD Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=us-ascii On 03 Jan 2014, at 17:53, Torbjorn Granlund <tg@gmplib.org> wrote: > We are about to release GMP 5.2. > > We have been forced to add three FreeBSD-related items to the releases > notes: > > * 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 not > correctly implemented. (Workaround: Use an older GMP release, or > install GNU m4 from /usr/ports and tell GMP to use it.) > > * 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.) > > * 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.) > > 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 broken > assembler (to much complexity to maintain workarounds for workarounds). > > The second item should not affect /usr/ports builds since they would use > the default 64-bit ABI on amd64 machines. > > The third item is a show-stopper until clang is fixed. We have not been > 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. > > > 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. Uhm, if you provide approximately zero information about these supposed "bugs", how do you expect anyone to help fixing them? -Dimitry --Apple-Mail=_B1954B60-B2CC-4E3B-A719-15342053E2AD Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename=signature.asc Content-Type: application/pgp-signature; name=signature.asc Content-Description: Message signed with OpenPGP using GPGMail -----BEGIN PGP SIGNATURE----- Version: GnuPG/MacGPG2 v2.0.22 (Darwin) iEYEARECAAYFAlLHARYACgkQsF6jCi4glqMwBACgzPlVwq/yMt9R7Wq1oePshHsN gukAn27UR96+snZb+5vViUJHHT8d3yp4 =qzpu -----END PGP SIGNATURE----- --Apple-Mail=_B1954B60-B2CC-4E3B-A719-15342053E2AD--
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