Date: Sun, 14 Nov 2010 22:13:34 +0100 From: =?utf-8?B?U3DDtnJsZWlu?= <uqs@spoerlein.net> To: Erik Cederstrand <erik@cederstrand.dk> Cc: Giorgos Keramidas <keramida@ceid.upatras.gr>, FreeBSD Hackers <hackers@freebsd.org>, Dimitry Andric <dim@freebsd.org> Subject: Re: Deterministic builds? Message-ID: <20101114211334.GG64243@acme.spoerlein.net> In-Reply-To: <1B779A27-D8AD-4479-AC43-7F5557B720D4@cederstrand.dk> References: <20101011084733.GM2392@deviant.kiev.zoral.com.ua> <95F3B27C-42E6-4267-9965-AC3219310C35@cederstrand.dk> <20101021175748.GD19295@acme.spoerlein.net> <C297DE8F-0842-41C2-A930-A15AA0F3B3BB@cederstrand.dk> <20101022100134.GL19295@acme.spoerlein.net> <8B6E3E35-68AF-42ED-98CF-E2A4448DAA11@cederstrand.dk> <xeia1v6q2t1h.fsf@kobe.laptop> <0CF7C325-E7D9-4C51-8E60-9A0243D2FFFE@cederstrand.dk> <4CE04750.8060802@FreeBSD.org> <1B779A27-D8AD-4479-AC43-7F5557B720D4@cederstrand.dk>
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[-- Attachment #1 --] On Sun, 14.11.2010 at 21:57:25 +0100, Erik Cederstrand wrote: > > Den 14/11/2010 kl. 21.32 skrev Dimitry Andric: > > > On 2010-11-14 21:22, Erik Cederstrand wrote: > >> I'm curious as to why this might be useful? Would the mtime of the > >> file not be be sufficient? I can only think of debugging purposes, but > >> apart from the timestamp, two kernels with the same rev. would be > >> bitwise identical, > > > > This does not have to be the case. For example, if you have have local > > modifications, or use different settings in make.conf or src.conf. > > In this case the timestamp + rev. is not sufficient to reproduce the kernel anyway. You'd need to store externally the non-standard contents of conf files, local diffs etc. on all your non-standard builds. You could do all sorts of fun stuff, even fool the rev. number or timestamp if you wanted. > > I'm just saying that for the standard user on a standard GENERIC kernel (and world for that matter) - the revision number should be sufficient for e.g. filing a PR. If you need the timestamp, there's the mtime. It might not be very easy, going from revision to timestamp. It is still very useful to know the rough timeframe when a kernel was built, as that might give you the "age" of the source tree. This is of course not a very good mapping, and the reason we have both the revision number in there, but also something a human understands. If this timestamp must be fixed, my vote would be on using the timestamp of the svn revision the build was using as a source. But it should be made clear, that this is then no longer the built timestamp, but the source repo timestamp. Uli [-- Attachment #2 --] 0 *H 01 0 + 0 *H u0000 *H 0y10U Root CA1 0 U http://www.cacert.org1"0 UCA Cert Signing Authority1!0 *H support@cacert.org0 100508212650Z 120507212650Z0<10UUlrich Sprlein1 0 *H uqs@spoerlein.net0"0 *H 0 hM V\piKx_ܼ&+_:W &?J39i2 E=H*1g~Q_ygo<;M6E5źQTGE&*qQˈ)6zϰNs+ Z{)}2Y|=p?)] Lҿ*ހܫųFH~*7e\bP`4mcLсކ -bb? 00 U 0 0V `HB IGTo get your own certificate for FREE head over to http://www.CAcert.org0@U %907++ +7 +7 `HB02+&0$0"+0http://ocsp.cacert.org0 U 0uqs@spoerlein.net0 *H )x.:ͬ >L 0>:ڄ>^,ZI LI'P wѳ_ S1Lu2:a@A=> z `-Eݾ@fET?e jVLȋ(t`mq`g#hEV"ɣ_Oޯb饊 .=L IG_! ~ N4ʹ! 5@VڪcVD5 t?% V9ÅPV<0,t| wXtT/Yg $o BV^ %J)b @\]Rl(}|5Br)+Jf5@ڸ0A.$ k+uR6IS !Iͯ[QiZB~ - H"b?(֧~܌f)EO{PDG?Zsp&JMAFZ2,ץ~fvmaw vߤ0=0% 0 *H 0y10U Root CA1 0 U http://www.cacert.org1"0 UCA Cert Signing Authority1!0 *H support@cacert.org0 030330122949Z 330329122949Z0y10U Root CA1 0 U http://www.cacert.org1"0 UCA Cert Signing Authority1!0 *H support@cacert.org0"0 *H 0 "F}6(P3@K;f?1k6|Nw6A Fs`n~XdͰE cg ҿ>L5]l!ޞ ٺf27rXɎ^> l[df*zKSy{/ a+~MVڒDA X`efD˔B~ ehQ Wkzr%[ 2H.0B%k?:SHҶ4 zX+[8]fɘמtq r`o34v>$z oE8GAJ. Yתғ}h.KX/ꕧTۋQ"þ,x ӊ/?Qe!eE |ALO)!3 u Qw i" Ṕ1{8h[+~_rLK Wʑ u!7c g>FOp gYͺbA )d)B"xC QKZZqs 00 U 2Ұ:90U #02Ұ:9ѡ}{0y10U Root CA1 0 U http://www.cacert.org1"0 UCA Cert Signing Authority1!0 *H support@cacert.org 0U 002U +0)0'%#!https://www.cacert.org/revoke.crl00 `HB#!https://www.cacert.org/revoke.crl04 `HB'%http://www.cacert.org/index.php?id=100V `HB IGTo get your own certificate for FREE head over to http://www.cacert.org0 *H (\5 ojhX>ÐZ`CpbgX 06;Htq>+h4b@F;S(fSM];`yi;eƁ\MU 7paj|.T>O!܂EMs<evj7$ NmQďʖmC0e';{CCcCh"{Z>7;N˛͚۲p-JذoEH3<2*T#Gdzq c~/ܟ+H%B>Wiw4 Kʠ ƌ27hs_QIS6 Ly:u pg/y= s og/ ${H5)@`ᖆPzY؏! ς;kV#lH<N/ So.t:c¦D l$pG.Բ d$ ܡ5ԼU.}UZ֓v%sLC1\0X00y10U Root CA1 0 U http://www.cacert.org1"0 UCA Cert Signing Authority1!0 *H support@cacert.org0 + 0 *H 1 *H 0 *H 1 101114211334Z0# *H 1Þ1qr*>ɯ70R *H 1E0C0 *H 0*H 0 *H @0+0 *H (0 *H sGgtPsE̚LX& NW_eƤ (QٌaLc"8:.<1z|&x%/R98D HP Kdɉ/V ܓ 0Ml,ZוlM덽'_>K^;"[ [{~8Ά<+{oύ?Pc Z "ǍjgzQT6r" " {iqdN]i D5 "L]+CŚlVXG FС%
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