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Nixpkgs Stdenv

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22 Jun 2024
@p14:matrix.orgp14I just went through a round of 'configure phase fails with message buried in config.log', 'try to determine if compiler works', 'it seems to work', 'but actually doesn't work correctly in the stdenv', where if the stdenv had just refused to build with a clear message showing it can't build hello world main.c it would have saved a bunch of time.13:16:03
@p14:matrix.orgp14I guess from the implementation of the stdenv's builder this might not be trivial to achieve: https://github.com/NixOS/nixpkgs/blob/1eae5f88019f10beb0da370cc7d1726471ed11da/pkgs/stdenv/generic/builder.sh#L23-L24 Is it straight forward to 'drop into the stdenv we just built' at the end of that script and attempt to run the compiler?13:22:00
@artturin:matrix.orgArtturin
In reply to @p14:matrix.org

I guess from the implementation of the stdenv's builder this might not be trivial to achieve:
https://github.com/NixOS/nixpkgs/blob/1eae5f88019f10beb0da370cc7d1726471ed11da/pkgs/stdenv/generic/builder.sh#L23-L24

Is it straight forward to 'drop into the stdenv we just built' at the end of that script and attempt to run the compiler?

No, cc is added after the builder is built
13:22:46
@artturin:matrix.orgArtturinI think so do check13:23:30
@vcunat:matrix.orgvcunat

the idea was that the stdenv package itself gains a checkPhase

Oh, OK. Though an issue is that you can often break it by per-package stuff, e.g. NIX_CFLAGS_COMPILE.

14:12:36
@p14:matrix.orgp14
In reply to @vcunat:matrix.org

the idea was that the stdenv package itself gains a checkPhase

Oh, OK. Though an issue is that you can often break it by per-package stuff, e.g. NIX_CFLAGS_COMPILE.

Yeah; I realise that is also an issue. I am first considering just broken stdenv though. At least with a stdenv check you only pay for a trivial compile once for the stdenv and not for every package, which seems more bearable. A per package check might also be nice but obviously comes at a greater compute cost.
14:41:40
@p14:matrix.orgp14
In reply to @artturin:matrix.org
I think so do check
Not quite able to follow what you mean there by “after the builder”, what I see is that stdenv has a fairly trivial shell script which builds the stdenv and it has the cc passed into it. Unless I misunderstand…
14:43:17
29 Jun 2024
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4 Jul 2024
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7 Jul 2024
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9 Jul 2024
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10 Jul 2024
@rvdp:infosec.exchangeRamses 🇵🇸 Could I get a review and potential merge on this PR? At least one person ran into trouble because of the issue it's fixing (compiler flags being repeated hundreds of times)
https://github.com/NixOS/nixpkgs/pull/301634
18:25:47
@rick:matrix.ciphernetics.nlMindaviI still kinda wish it wouldn't all be bash, it's not easy on the eyes at all20:19:52
@rvdp:infosec.exchangeRamses 🇵🇸Totally agree, it wasn't fun at all to write this function, but it seems that we're stuck with bash for the foreseeable future23:04:58
11 Jul 2024
@rick:matrix.ciphernetics.nlMindaviThank you for doing that07:39:25
@rick:matrix.ciphernetics.nlMindaviI've one question and then I'd say it's good to go, but my bash isn't that great07:39:58
15 Jul 2024
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23 Jul 2024
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24 Jul 2024
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26 Jul 2024
@rosscomputerguy:matrix.orgTristan Ross joined the room.03:12:38
30 Jul 2024
@rosscomputerguy:matrix.orgTristan RossLooking into getting Zig to be able to bootstrap Nix. I have started figuring things out.04:02:04
@rosscomputerguy:matrix.orgTristan RossThe idea is to be able to use Zig to bootstrap Nix for LLVM.04:02:48
@paparodeo:matrix.orgrenowhat is the benefit of using zig than just using llvm to bootstrap itself like what is done in freebsd and darwin? 04:27:39
@paparodeo:matrix.orgreno * what is the benefit of using zig than just using llvm to bootstrap itself like what is done in freebsd and darwin? or gcc like is done on linux04:29:13
@rosscomputerguy:matrix.orgTristan Ross
In reply to @paparodeo:matrix.org
what is the benefit of using zig than just using llvm to bootstrap itself like what is done in freebsd and darwin? or gcc like is done on linux
Zig prebuilds are a static binary with Clang statically linked in so more of convenience
04:45:34
@rosscomputerguy:matrix.orgTristan RossAlso, a bootstrap archive wouldn't be necessary.04:46:19

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