From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from lists.gentoo.org (pigeon.gentoo.org [208.92.234.80]) by finch.gentoo.org (Postfix) with ESMTP id BFB49138825 for ; Fri, 7 Nov 2014 19:57:51 +0000 (UTC) Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id 17A31E0896; Fri, 7 Nov 2014 19:57:47 +0000 (UTC) Received: from smtp.gentoo.org (smtp.gentoo.org [140.211.166.183]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by pigeon.gentoo.org (Postfix) with ESMTPS id 03210E083B for ; Fri, 7 Nov 2014 19:57:45 +0000 (UTC) Received: from [192.168.1.20] (net-93-159-159-142.connected.pl [93.159.159.142]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: jauhien) by smtp.gentoo.org (Postfix) with ESMTPSA id A5BBA3402B4 for ; Fri, 7 Nov 2014 19:57:43 +0000 (UTC) Message-ID: <545D2435.9040309@gentoo.org> Date: Fri, 07 Nov 2014 20:57:41 +0100 From: Jauhien Piatlicki User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.2.0 Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-dev@lists.gentoo.org Reply-to: gentoo-dev@lists.gentoo.org MIME-Version: 1.0 To: gentoo-dev@lists.gentoo.org Subject: Re: [gentoo-dev] Portage dependency solving algorithm References: <970447233.123246.1415278148751.JavaMail.yahoo@jws10951.mail.sg3.yahoo.com> <545B76DA.30000@gentoo.org> <20141106134301.3bd86ad9@googlemail.com> <545C940F.1030206@gentoo.org> <20141107180723.2acdb8e7@googlemail.com> <545D0B38.4070105@gentoo.org> <20141107183011.20f12812@googlemail.com> <20141107192101.01262936@googlemail.com> In-Reply-To: <20141107192101.01262936@googlemail.com> Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="uuOoVv3au05wTRW4c12Oa198m6QLG0rJW" X-Archives-Salt: 533a0cda-09b7-43d2-a19d-2b5fb5609f98 X-Archives-Hash: eadeccfb6f5b0f073845802b50759d6f This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --uuOoVv3au05wTRW4c12Oa198m6QLG0rJW Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable On 11/07/2014 08:21 PM, Ciaran McCreesh wrote: > The main issue, though, is that getting a "good" resolution out of > crappy data is extremely difficult. There's the Babbage quote: >=20 > | On two occasions I have been asked, =E2=80=94 "Pray, Mr. Babbage, if = you put > | into the machine wrong figures, will the right answers come out?" In > | one case a member of the Upper, and in the other a member of the > | Lower, House put this question. I am not able rightly to apprehend > | the kind of confusion of ideas that could provoke such a question. >=20 > Yet this is *exactly* what a dependency resolver has to do for Gentoo, > and it's why dependency resolvers are so complicated. >=20 > (For comparison, Paludis on Exherbo will run an order of magnitude > faster for the same set of installed packages, simply because on > Exherbo the input is correct.) >=20 What;s wrong with input? PMS itself or how do maintainers write ebuilds? Could you explain? --uuOoVv3au05wTRW4c12Oa198m6QLG0rJW Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQIcBAEBAgAGBQJUXSQ1AAoJELvuk32y76HUzLQP/03g+r4mNwiQaNLU2VGtYdkC WzBqu7kNrARF3te1p8uKy3SPq0uZcp4dSBlcz3wJjAKJ9bdSsGcg9acYhEVobLNB tF7iJ6gkoyleKrY8dlxCwl/4Gy4Aet9mL5MlD0PmrEtDjZGhs6gWHtlZr6vL1t4I KHsOYQTSPvDLpYhY5RxUxJznfvZQsfPEialOdUXX2tmzwl22piEe98gA/KIxFoPo Q3GAkMqmk+09/cDNhBGzRsPNRkNqWXO8/3sCPBKnRquyiebBUJ5H8PT6VV7kxufC +h6wI6FBukhrgFwf7PSuLPQi56TCqvj/z7+lD0EmjxyWBcLDKOLnxaPvX7q/ywwC 8cvdR/CUdnQ5k82qSF6EwWGvhgAVzt2K0wgGmGerpk3dzeGIYejzXa9pU9v0zYSd DZyZWBWBUKTv85X3IKbR0dC0/5/IeWQj09PYp11mKbsLvAx3DgI7WFzcKcJepRSU OZuajqtNlGqJGR8mAbQO7C5kQivqD09nRRqNMexn4IJtXB31LOwqTIy95ySMK0FO iiutp4no/D0Drz6W4y5UKdoi93tPf0HFr+oRR6PKy+6zgB/PDO31dW4ZOXTu0CLB EgTSZPEig7x/R54hreTIVX9HHI+nCFEB2ixH0D1gap/EWeks6Ejgxj7JuTB0fiZX UoHKxxG1RLo5wBprwRTR =txAQ -----END PGP SIGNATURE----- --uuOoVv3au05wTRW4c12Oa198m6QLG0rJW--