12018-02-07T00:08:38  <BlueMatt> cfields: just have to be enough time for you to hit "close"...I was using 5sec, but ofc any number works
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 452018-02-07T03:05:46  <conman> hmm 0.16.0rc2 doesn't like my testnet in a box
 462018-02-07T03:05:50  <conman> validation.cpp:4391: void CChainState::CheckBlockIndex(const Consensus::Params&): Assertion `(pindexFirstNeverProcessed != nullptr) == (pindex->nChainTx == 0)' failed.
 472018-02-07T03:06:32  <conman> works fine with 0.15.x
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 512018-02-07T03:32:40  <BlueMatt> conman: most likely not a regression.....new defaults - checkblockindex is on by default on testnet now
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 532018-02-07T03:38:35  <conman> k
 542018-02-07T03:38:45  <conman> it's regtest obviously
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 572018-02-07T03:42:57  <BlueMatt> will look into it tomorrow, please file issue
 582018-02-07T03:43:02  <BlueMatt> (if there isnt one already)
 592018-02-07T03:44:05  <BlueMatt> nvm, 311782
 602018-02-07T03:44:10  <BlueMatt> nvm, #11782
 612018-02-07T03:44:11  <gribble> https://github.com/bitcoin/bitcoin/issues/11782 | Assertion failure in validation.cpp:4203 (re: pindexFirstNeverProcessed) · Issue #11782 · bitcoin/bitcoin · GitHub
 622018-02-07T03:44:46  <BlueMatt> conman: does that match your issue? (due to an upgrade on regtest without a reindex-chainstate)
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 642018-02-07T03:44:54  <BlueMatt> its a change in network parameters on regtest
 652018-02-07T03:45:14  <BlueMatt> also, probably want to release-notes this one!
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 672018-02-07T03:48:58  <conman> looks the same
 682018-02-07T03:52:28  <conman> thanks
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 782018-02-07T04:45:50  <hanzou> I notice that getblocks (NetMsgType::GETBLOCKS) seems to be defined but never used, just GETBLOCKTXN and others.
 792018-02-07T04:49:42  <hanzou> Well Bitcoin core has code such that a client will respond to getblocks, but it never sends it.
 802018-02-07T04:49:53  <hanzou> When did clients stop sending getblocks?
 812018-02-07T04:50:36  <sipa> BIP152
 822018-02-07T04:51:04  <sipa> between compatible clients, getblocks isn't used anymore as BIP152 (compact blocks) is much more efficient
 832018-02-07T04:55:34  <sipa> getblocks is still used while synchronizing old blocks
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 852018-02-07T04:58:33  <jjjkkk> test
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 882018-02-07T05:28:15  <bitcoin-git> [bitcoin] murrayn opened pull request #12373: Build: Add build support for profiling. (master...profiling) https://github.com/bitcoin/bitcoin/pull/12373
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1032018-02-07T05:54:43  <hanzou> Thanks sipa
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1562018-02-07T09:34:53  <bitcoin-git> [bitcoin] laanwj opened pull request #12374: qt: Make sure splash screen is freed on AppInitMain fail (master...2017_02_splash_abort) https://github.com/bitcoin/bitcoin/pull/12374
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2122018-02-07T14:06:29  <bitcoin-git> [bitcoin] MarcoFalke opened pull request #12377: qt: Avoid initialization during shutdown (master...Mf1802-qtInitShutdown) https://github.com/bitcoin/bitcoin/pull/12377
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2322018-02-07T15:07:56  <rooster__> Olaa all :)
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2342018-02-07T15:09:37  <rooster__> Anyone home? :)
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2382018-02-07T15:13:10  <rooster__> Yo Rex!
2392018-02-07T15:13:17  <rooster__> Whats the word?
2402018-02-07T15:15:06  <rooster__> I am wondering if anyone can lend me a quick hand :?
2412018-02-07T15:16:08  <rooster__> I am implementing the bitcoin protocol in Android/Java. When I send a getaddr message, the peer responds with an alert message?
2422018-02-07T15:16:35  <Lauda> Try #bitcoin or #bitcoin-dev; this is the wrong channel for that.
2432018-02-07T15:17:28  <rooster__> Thanks lauda, ill post on there :0
2442018-02-07T15:17:30  <rooster__> :)
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2622018-02-07T15:52:43  <sdaftuar> hanzou: sipa: getblocks is what we used to do before headers-first sync.  it's been replaced by getheaders, since 0.10 i think
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2662018-02-07T16:03:42  <bitcoin-git> [bitcoin] jnewbery opened pull request #12379: [WIP] Better stderr testing in functional tests (master...test_full_stderr2) https://github.com/bitcoin/bitcoin/pull/12379
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3042018-02-07T18:36:05  <bitcoin-git> [bitcoin] MarcoFalke opened pull request #12380: 0.16: Check in current release notes draft (0.16...Mf1802-docRel16) https://github.com/bitcoin/bitcoin/pull/12380
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3462018-02-07T21:18:09  <bitcoin-git> [bitcoin] MarcoFalke pushed 2 new commits to master: https://github.com/bitcoin/bitcoin/compare/1462bde767a1...0277173b1def
3472018-02-07T21:18:10  <bitcoin-git> bitcoin/master 9ad6746 practicalswift: Use static_cast instead of C-style casts for non-fundamental types...
3482018-02-07T21:18:10  <bitcoin-git> bitcoin/master 0277173 MarcoFalke: Merge #10498: Use static_cast instead of C-style casts for non-fundamental types...
3492018-02-07T21:18:22  <bitcoin-git> [bitcoin] MarcoFalke closed pull request #10498: Use static_cast instead of C-style casts for non-fundamental types (master...static_cast) https://github.com/bitcoin/bitcoin/pull/10498
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3762018-02-07T22:41:35  <cfields> dongcarl: what's the issue with gitian and newer LXC ?
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3782018-02-07T22:42:46  <dongcarl> cfields: I'm just writing up something right now actually haha.
3792018-02-07T22:42:59  <cfields> dongcarl: ah, ok
3802018-02-07T22:43:05  <dongcarl> cfields: in a nutshell at the very least the config file has to be changed
3812018-02-07T22:43:29  <dongcarl> cfields: I'm also getting a tty error for all lxc-execute commands
3822018-02-07T22:43:36  <cfields> dongcarl: isn't the config written on-the-fly ?
3832018-02-07T22:43:59  <dongcarl> yes, but they changed the key names in 2.1
3842018-02-07T22:44:20  <dongcarl> kallewoof actually ran into the tty errors back in December
3852018-02-07T22:44:33  *** Emcy_ has joined #bitcoin-core-dev
3862018-02-07T22:44:43  <dongcarl> and through GitHub digging it seems like an upstream glib thing, but that could be wrong
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3882018-02-07T22:46:05  <dongcarl> these issues are with LXC 2.1.1 right now, but I'm guessing non-rolling distros will move over to 2.1 soon
3892018-02-07T22:46:17  <cfields> dongcarl: I assume you tried passing "-t" to ssh ?
3902018-02-07T22:46:38  <dongcarl> cfields: I'm using LXC so there's no ssh, just lxc-execute
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3922018-02-07T22:47:19  <dongcarl> look in libexec/on-target:53
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3942018-02-07T22:47:48  <cfields> ah, right
3952018-02-07T22:48:10  *** Roben has quit IRC
3962018-02-07T22:48:23  <dongcarl> I'm looking through and it seems like some of the stuff hasn't been touched for quite a while
3972018-02-07T22:48:32  <dongcarl> and most "touching" have been just workarounds
3982018-02-07T22:48:37  <dongcarl> correct me if I'm wrong
3992018-02-07T22:49:02  <cfields> gitian, you mean?
4002018-02-07T22:49:09  <dongcarl> cfields: yes
4012018-02-07T22:50:51  <cfields> dongcarl: sounds about right, i haven't looked lately though
4022018-02-07T22:51:07  <dongcarl> cfields: gimme a bit, gunna dump a writeup in a sec
4032018-02-07T22:51:08  <cfields> dongcarl: does passing -c to sh/bash help at all?
4042018-02-07T22:51:10  <cfields> ok
4052018-02-07T22:51:10  *** Randolf has joined #bitcoin-core-dev
4062018-02-07T22:52:25  <dongcarl> cfields: sipa recommended that I talk to you about this. I've been looking into making
4072018-02-07T22:52:28  <dongcarl> gitian more robust over the last few days and was wondering what you and others would t
4082018-02-07T22:52:31  <dongcarl> hink of these possible changes. I refer to the container actually building the Bitcoin
4092018-02-07T22:52:34  <dongcarl> binary as the "build container" and the host/container running the aforementioned conta
4102018-02-07T22:52:37  <dongcarl> iner the "container host."
4112018-02-07T22:52:40  * dongcarl shakes head at tmux
4122018-02-07T22:53:07  <dongcarl> 1. Using vagrant to spin up a "container host" with a provisioner to spin up a "build container." This is similar to what is done for zcash (https://github.com/zcash/zcash-gitian). This solution has the advantage of not breaking existing builds and being easy to implement, but wastes cycles for containerization/virtualization.
4132018-02-07T22:53:12  <dongcarl> 2. Replacing gitian's direct interfacing with LXC and KVM with vagrant. As in, let vagrant handle communicating with its provider (LXC, KVM, VirtualBox, VMWare, etc.), and gitian will interface with vagrant. This solution has the advantage of wasting less cycles, but it might break existing builds, and a slight annoyance is relying on third party repos to code up the integration between vagrant
4142018-02-07T22:53:18  <dongcarl> and the provider of choice, but looking through the ones people would use (e.g. vagrant-lxc) it seems like they're well maintained.
4152018-02-07T22:53:21  <dongcarl> 3. Same as #2 but have libvirt instead of vagrant.
4162018-02-07T22:53:24  <dongcarl> sorry about that folks
4172018-02-07T22:53:24  <gribble> https://github.com/bitcoin/bitcoin/issues/2 | Long-term, safe, store-of-value · Issue #2 · bitcoin/bitcoin · GitHub
4182018-02-07T22:55:29  *** Chris_Stewart_5 has quit IRC
4192018-02-07T22:55:38  <cfields> dongcarl: it's worth mentioning up front that there are some other build changes in the works that simplify what gitian is responsible for
4202018-02-07T22:57:04  <cfields> regardless, #2 sounds reasonable to me
4212018-02-07T22:57:07  <gribble> https://github.com/bitcoin/bitcoin/issues/2 | Long-term, safe, store-of-value · Issue #2 · bitcoin/bitcoin · GitHub
4222018-02-07T22:57:58  <sipa> from what i hear, it sounds like we may end up relying on a pre-built image somehow
4232018-02-07T22:58:45  <cfields> dongcarl: I'm working on a process that builds deterministic toolchain and rootfs for us to use. In theory, gitian isn't even necessary. But in practice, we'll need a very thin wrapper that just runs a script and gathers the results
4242018-02-07T22:59:03  <sipa> cfields: how far along are you with that?
4252018-02-07T22:59:09  <cfields> sipa: pre-built image?
4262018-02-07T22:59:12  <sipa> i was assuming that may not happen overnight
4272018-02-07T23:00:15  <cfields> sipa: I was on a roll for a while, but then got stuck working on static pie for gcc. I think I could have it up and going relatively quickly if it's holding up progress.
4282018-02-07T23:00:40  <sipa> hmmm, static pie </homer>
4292018-02-07T23:00:49  <cfields> haha
4302018-02-07T23:01:19  <dongcarl> cfields: so sort of like what coreboot does?
4312018-02-07T23:01:42  <sipa> cfields: am i right that this would mean we can build deterministic binaries just from depends make, without any vm?
4322018-02-07T23:01:44  <cfields> I only mentioned the toolchain stuff because Mark mentioned reworking gitian a while back, and his plans would've conflicted
4332018-02-07T23:02:15  <cfields> sipa: correct. The only variables are the running kernel and filesystem
4342018-02-07T23:02:20  <cfields> dongcarl: I'm not familiar
4352018-02-07T23:02:33  <sipa> cfields: what do you mean by variables?
4362018-02-07T23:02:45  <cfields> sipa: sorry, sources of non-determinism
4372018-02-07T23:02:56  <sipa> hmm, how so?
4382018-02-07T23:03:04  <sipa> how does the filesystem matter?
4392018-02-07T23:03:12  <sipa> order it lists files etc?
4402018-02-07T23:03:15  <cfields> yup
4412018-02-07T23:03:32  <cfields> I'm hoping to just slowly patch those things upstream as they arise
4422018-02-07T23:04:15  <dongcarl> so we'll end up needing some sort of container to normalize that anyways? I'm trying to decide whether or not I should spend time on solution no. 2 right now...
4432018-02-07T23:04:18  <sipa> well that sounds like a major improvement over what we have
4442018-02-07T23:04:20  <cfields> gcc/binutils is in good shape these days. busybox is the one I'm unsure about
4452018-02-07T23:05:03  <sipa> it would also let us pin a particular gcc version more easily, without depending on what's available in a particular build env
4462018-02-07T23:05:06  <cfields> dongcarl: realistically yes, I think
4472018-02-07T23:05:56  <arubi> cfields, you've seen landley's mkroot right?
4482018-02-07T23:06:28  <cfields> sipa: yes, very much so. Our own config as well. the stupid mingw-w64 thread issue is a good example of how we're at the mercy of Ubuntu atm
4492018-02-07T23:07:25  <sipa> cfields: do you have any idea about realistic timelines on the self-built compiler environment stuff?
4502018-02-07T23:07:58  <cfields> sipa: just for using locally or for actually building releases?
4512018-02-07T23:08:14  <dongcarl> actually building?
4522018-02-07T23:08:27  <dongcarl> does sound cool
4532018-02-07T23:08:39  <sipa> cfields: i'd say something in between, as in "actually usable for building releases if we wanted to"
4542018-02-07T23:08:50  <sipa> even if we don't immediately decide to switch to it
4552018-02-07T23:09:01  <cfields> sipa: .17 seems reasonable...
4562018-02-07T23:09:45  <dongcarl> cfields: do you have a repo up somewhere where I can also take a look and contribute?
4572018-02-07T23:09:53  <cfields> sipa: I think the biggest issue is that I'm targetting gcc 8.1, which hasn't even been released yet. And I'm sure we want to wait for some hardening
4582018-02-07T23:10:46  <cfields> dongcarl: not atm, but I can push something up in a week or two
4592018-02-07T23:11:20  <dongcarl> cfields: that would be fantastic, I'd love to help get it across the line in whatever way I can
4602018-02-07T23:11:55  <cfields> dongcarl: great :)
4612018-02-07T23:12:42  <cfields> dongcarl: thinking about it a bit, an abstraction around lxc/kvm/vbox/whatever is kinda just re-introducing the same non-determinism we're looking to avoid.
4622018-02-07T23:13:16  <dongcarl> cfields: how so?
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4652018-02-07T23:15:58  <cfields> dongcarl: presumably they'd all have different methods for creating the target image, meaning that each may have (for ex) a separate filesystem
4662018-02-07T23:16:11  <cfields> s/separate/differing/
4672018-02-07T23:16:24  <dongcarl> cfields: well, actually, for vagrant they share the same image!
4682018-02-07T23:17:33  <sipa> cfields: gcc... 8?
4692018-02-07T23:17:59  *** mirese has quit IRC
4702018-02-07T23:18:01  <dongcarl> cfields: e.g. https://app.vagrantup.com/debian/boxes/jessie64/versions/8.7.0
4712018-02-07T23:18:02  <cfields> dongcarl: sure, but they'll still virtualize things differently. lxc may hit a real disk for files, for ex
4722018-02-07T23:18:07  <sipa> what in particular is in 8.1 that makes it attractive?
4732018-02-07T23:18:11  <cfields> sipa: I'm upstreaming fixes
4742018-02-07T23:18:24  <sipa> gotcha
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4762018-02-07T23:18:39  <dongcarl> cfields: makes sense
4772018-02-07T23:18:52  <cfields> sipa: in particular, deterministic cross-libc bootstrap and static pie
4782018-02-07T23:19:14  <cfields> dongcarl: I'm not saying it can't work. Obviously it works now, because gitian can use kvm or lxc...
4792018-02-07T23:19:15  <sipa> but gcc 8 isn't even out yet?
4802018-02-07T23:19:34  <cfields> dongcarl: I was just making the point that it's kinda a lateral move in that sense
4812018-02-07T23:19:53  <cfields> sipa: heh, thank gcc's inane versioning scheme
4822018-02-07T23:20:09  <cfields> sipa: 8.0 is beta, 8.1 is final.
4832018-02-07T23:20:10  <dongcarl> cfields: right, and if we can finish this in .17, doesn't make sense to spend time on moving to that
4842018-02-07T23:20:12  <sipa> i see
4852018-02-07T23:20:22  <dongcarl> that = vagrant and no. 2
4862018-02-07T23:20:45  <cfields> dongcarl: right
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4882018-02-07T23:21:20  * dongcarl is excited for cfield's code to be pushed up
4892018-02-07T23:22:16  <cfields> dongcarl: basically, we're defining a reference system. We really can't get around that. So I'm apprehensive about attempts to abstract away the reference.
4902018-02-07T23:22:35  <cfields> Again, I realize that's what gitian does now.
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4922018-02-07T23:23:27  <dongcarl> You're absolutely right. I think for my own building needs I'll just make my own version of no. 1 for now. Basically what's in the guides for virtualbox but with vagrant. Super easy to setup.
4932018-02-07T23:27:06  <cfields> sounds good
4942018-02-07T23:28:09  <cfields> dongcarl: what I'd be curious to see would be the thinnest possible wrapper on top of some vm. Just setup the cache, run the script, report the results
4952018-02-07T23:28:55  *** quer has quit IRC
4962018-02-07T23:29:02  <dongcarl> cfields: check out the linked zcash README
4972018-02-07T23:29:06  *** larafale has quit IRC
4982018-02-07T23:29:11  <dongcarl> https://github.com/zcash/zcash-gitian
4992018-02-07T23:29:19  <dongcarl> uber-simple
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5022018-02-07T23:29:54  <dongcarl> (not a big fan of the number of build dependencies tho)
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5042018-02-07T23:30:54  <cfields> well ours will have no dependencies, so that's easy
5052018-02-07T23:31:25  <dongcarl> woot woot
5062018-02-07T23:31:59  <cfields> hmm
5072018-02-07T23:32:52  <cfields> I guess using vagrant with some static config is no different from rolling our own, in terms of determinism
5082018-02-07T23:33:31  <gmaxwell> gitian abstracting away the reference mostly is just introducing significant insecurity and pretending we don't need to worry about it.
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5102018-02-07T23:34:57  <dongcarl> cfields: true, but vagrant references boxes by name, not hashes, and those boxes can be maliciously built.
5112018-02-07T23:35:29  <dongcarl> cfields: what'd be nice is a script that builds the vagrant box (like gitian does with debootstrap) then launches it with a static config
5122018-02-07T23:35:35  <dongcarl> gmaxwell: Agreed.
5132018-02-07T23:36:22  <dongcarl> cfields: btw what did you mean by "rolling our own"?
5142018-02-07T23:36:26  <cfields> dongcarl: can we not just use a generic ubuntu-minimal image ?
5152018-02-07T23:37:27  <dongcarl> cfields: from ubuntu or from vagrant boxes? Vagrant has its own repository of pre-built boxes that are referred to by name that everyone uses.
5162018-02-07T23:37:34  <cfields> (I've never used vagrant, though I assume it's not hugely different from the other similar vm builders/launchers)
5172018-02-07T23:38:26  <dongcarl> so the "vagrant boxes" are supposed to just immediately spin up with no install process
5182018-02-07T23:38:45  <cfields> gmaxwell: the insecurity being "trusting ubuntu", you mean?
5192018-02-07T23:39:39  <cfields> dongcarl: by "rolling our own", I meant writing something like gitian
5202018-02-07T23:40:20  <cfields> dongcarl: I see. Looks like I need to read up.
5212018-02-07T23:40:39  <gmaxwell> cfields: right, and their ongoing updates.  For users that already run ubuntu arguably there is not much increase in surface over what they already face, but that doesn't apply to people who run other things than ubuntu.
5222018-02-07T23:41:17  <cfields> gmaxwell: sure, completely agree. Just wanted clarification.
5232018-02-07T23:41:26  <gmaxwell> AFAIK we don't have any reason to think ubuntu's build process is particularly secure either,  e.g. could be internet connected hosts that a hundred people have remote shell access on.
5242018-02-07T23:41:55  <gmaxwell> And certantly whatever it is, it runs a lot of effectively unreviewed potentially malicious code.
5252018-02-07T23:42:07  <dongcarl> cfields: yeah if we end up needing something to control the two variables you mentioned earlier, vagrant would probably work well with a fixed provider, static config, and building our own boxes instead of fetching from the repo.
5262018-02-07T23:42:40  <dongcarl> gmaxwell: :-/
5272018-02-07T23:43:16  <gmaxwell> if or once we get to the point where our build process builds the same binaries when run from different systems at least we'll be able to crosscheck against something else, even if the standard build enviroment remains an ubuntu vm.
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5292018-02-07T23:44:55  <dongcarl> gmaxwell: "where our build process builds the same binaries when run from different systems" <- as in when cfields finishes the work on unVM'd deterministic builds?
5302018-02-07T23:45:19  <gmaxwell> right.
5312018-02-07T23:46:02  <gmaxwell> I think it's likely though that the standard process for that will still have people use a standard vm image... just because it'll be a baseline system that we know works.
5322018-02-07T23:46:05  * dongcarl looks forward to the day when determinist builds work on FreeBSD
5332018-02-07T23:47:13  <dongcarl> gmaxwell: yeah, we were talking about that earlier, kernel and filesystem are the two variables that are most easily controlled by VMs I guess.
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5352018-02-07T23:50:07  <cfields> gmaxwell: yes. So far I have a minimal rootfs that's capable of building bitcoin. It's basically just busybox/make/toolchain. Dealing with kernels is just too far out of scope, though. Ideally, we'd just boot some minimal image in a vm, chroot, and make
5362018-02-07T23:50:37  <gmaxwell> cfields: are you finding that the kernel and whatnot breaks determinism
5372018-02-07T23:50:38  <cfields> (that minimal rootfs build is deterministic and would first be built in gitian itself)
5382018-02-07T23:51:32  <cfields> gmaxwell: no, I was just enumerating the issues at play. Almost all issues we've had have come from filesystem.
5392018-02-07T23:51:43  <gmaxwell> ah good.
5402018-02-07T23:53:23  <cfields> dongcarl: I should think that fbsd deterministic builds would come pretty close to working as-is
5412018-02-07T23:54:10  <dongcarl> cfields: with virtualbox you mean?
5422018-02-07T23:54:38  <cfields> dongcarl: cross build from linux with gitian
5432018-02-07T23:55:09  <dongcarl> cfields: Oh. I mean, DOING deterministic builds from FreeBSD haha
5442018-02-07T23:55:39  <cfields> oh. why? :)
5452018-02-07T23:56:25  <dongcarl> cfields: Because... I'm a sadist who loves making things work on *BSD.
5462018-02-07T23:56:44  <gmaxwell> (1) because some people run it, and (2) hey, distinct build enviroment is better for crosschecking determinism.
5472018-02-07T23:56:58  <gmaxwell> But it's okay if people have to suffer to make it work.
5482018-02-07T23:57:08  <dongcarl> let's pretend I thought of (2) there
5492018-02-07T23:57:30  <dongcarl> next stop: plan 9 deterministic builds
5502018-02-07T23:57:36  <dongcarl> then: seL4
5512018-02-07T23:57:48  <gmaxwell> nah, build on AT&T unix on SIMH pdp11. :P
5522018-02-07T23:58:17  <dongcarl> <3
5532018-02-07T23:58:28  <cfields> sure, no complaints if someone wants to try
5542018-02-07T23:59:16  <cfields> I plan to attempt the same for osx, but just because I want to see where the differences end up coming from
5552018-02-07T23:59:29  *** Victorsueca has quit IRC
5562018-02-07T23:59:33  <sipa> OS/2, please.
5572018-02-07T23:59:42  <gmaxwell> it would be kinda interesting if the project there were at least two distinct project recommended base VMs, and people were told to use one based on hashing their name.