Trouble building GHC
Bryan Richter
bryan at haskell.foundation
Sun Jun 4 07:10:11 UTC 2023
> I’m just hoping that someone can update the README at
https://github.com/alpmestan/ghc.nix.
That "someone" could be you! :O In fact, you are probably the most
qualified to do so!
On Sat, 3 Jun 2023, 22.17 Lyle Kopnicky, <lists at qseep.net> wrote:
> Thanks for the explanation. I’m just hoping that someone can update the
> README at https://github.com/alpmestan/ghc.nix. It still says to run
>
> nix-shell ~/ghc.nix/shell.nix --run './boot && ./configure $CONFIGURE_ARGS && make -j4'
>
>
> Thanks for your help!
> Lyle
>
> On May 31, 2023 at 2:41:28 AM, Sebastian Graf <sgraf1337 at gmail.com> wrote:
>
>> > I've had no issues with the configure step by running the configure_ghc
>> shell function that the flake provides.
>>
>> For reference, this is the relevant ghc.nix issue:
>> https://github.com/alpmestan/ghc.nix/issues/111
>> It seems that the `configure_ghc` used to be a shell function in
>> https://github.com/alpmestan/ghc.nix/blob/b200a76a4f28d6434e4678827a0373002e641b12/default.nix#L156
>> .
>> Nowadays, it became a standalone bash script (great work, Magnus!), which
>> explains why it works for you:
>> https://github.com/alpmestan/ghc.nix/blob/f34c21877257fc37bbcf8962dc006024bfd0f946/ghc.nix#L138
>>
>> You can't do `./configure $CONFIGURE_ARGS` in zsh directly, though.
>>
>> Am Mi., 31. Mai 2023 um 09:49 Uhr schrieb Georgi Lyubenov <
>> godzbanebane at gmail.com>:
>>
>>> Just chiming in to mention that I'm on zsh, and I've had no issues with
>>> the configure step by running the configure_ghc shell function that the
>>> flake provides.
>>> On 5/31/23 10:13, Sebastian Graf wrote:
>>>
>>> Hi Lyle,
>>>
>>> I'm sorry that you have so much trouble in getting your first build done.
>>> The Classes.hi issue sounds like something I had experienced in the
>>> past, but I'm not having it at the moment.
>>> Are you also using symlinks by any chance? Then it is very likely that
>>> you have been bitten by
>>> https://gitlab.haskell.org/ghc/ghc/-/issues/22451, the workaround to
>>> which would be to do something like `cd "$(readlink -f .)"` before you
>>> start your build.
>>>
>>> Regarding your second issue using ghc.nix, a quick google turned up
>>> https://gitlab.haskell.org/ghc/ghc/-/issues/20429#note_379762.
>>> Is it possible that you didn't start from a clean build?
>>> E.g., at the least you should `rm -rf _build` (note that `hadrian/cabal
>>> clean` sadly is insufficient IIRC for reasons I don't recall).
>>> I often simply do `git clean -fxd` to be extra sure.
>>> After that, you'll have to boot, configure (including passing
>>> $CONFIGURE_ARGS) and build again.
>>> By the way, are you using ZSH? I'm using it and I have to pass the
>>> CONFIGURE_ARGS in a slightly different way
>>> <https://github.com/alpmestan/ghc.nix#building-ghc>: `./configure
>>> ${=CONFIGURE_ARGS}`.
>>>
>>> I also updated
>>> https://gitlab.haskell.org/ghc/ghc/-/wikis/building/preparation/linux#nixnixos
>>> to account for new-style flakified builds+direnv, if that's a workflow that
>>> you are familiar with.
>>>
>>> Hope that helps,
>>> Sebastian
>>>
>>> Am Mi., 31. Mai 2023 um 05:14 Uhr schrieb Lyle Kopnicky <lists at qseep.net
>>> >:
>>>
>>>> Hi folks, I’m new here. I’ll be attending the GHC Contributors’
>>>> Workshop next week, and in preparation, I’m trying to build GHC, both the
>>>> native code backend and the JS backend. So far, I’ve only tried to build it
>>>> with the native code backend, but I haven’t been able to get it to work.
>>>> I’ve gotten help from some friendly folks on the #ghc channel on Matrix,
>>>> and made some progress, but I’m still stuck.
>>>>
>>>> Is there anyone here who could be a point person for helping me get it
>>>> to build? BTW I’m located on the west coast of the US (until next week when
>>>> I’ll be in Switzerland), so time lag may be a factor.
>>>>
>>>> I’m using a Mac with aarch64 and macOS 13.3. Here are some of the
>>>> things I’ve tried, and issues I’ve run into:
>>>>
>>>>
>>>> - Started with the advice from this wiki:
>>>> https://gitlab.haskell.org/ghc/ghc/-/wikis/building
>>>> - Checked out the ghc source, on HEAD.
>>>> - The rest of the steps were at
>>>> https://gitlab.haskell.org/ghc/ghc/-/wikis/building/preparation/mac-osx
>>>> - Already had Apple’s command line tools, but when I tried to do
>>>> operations using them, I got an error saying I needed the full Xcode, so I
>>>> installed that.
>>>> - brew install autoconf automake python sphinx-doc
>>>> - Worked fine, also added sphinx-build to the path
>>>> - Initially tried using ghc 9.2.7 to build - later tried switching
>>>> to 9.4.4 and eventually 9.4.5
>>>> - cabal update; cabal install alex happy haddock
>>>> - This is where I ran into trouble - couldn’t build haddock. Cabal
>>>> said it couldn’t resolve the dependencies.
>>>> - I tried switching to ghc 9.4.4 and cabal 3.10.1.0 - same
>>>> problem
>>>> - User romes (Rodrigo) on #ghc helped with this - was able to
>>>> reproduce it and filed a ticket:
>>>> https://github.com/haskell/haddock/issues/1596
>>>> - However he pointed out that haddock was already supplied
>>>> through ghcup so I don’t need to build it.
>>>> - Already had MacTex installed and I installed the DejaVu font
>>>> family.
>>>> - ./boot && ./configure
>>>> - Worked fine, although ./boot gave me lots of autoconf warnings
>>>> like:
>>>> configure.ac:9: warning: The macro `AC_HELP_STRING' is obsolete.
>>>> configure.ac:9: You should run autoupdate.
>>>> - Apparently autoconf has renamed these macros to pluralize
>>>> them, and also encloses the arguments in square brackets.
>>>> - hadrian/build
>>>> - Ran into another problem: The build failed with:
>>>> Error, file does not exist and no rule available:
>>>>
>>>> /Users/lyle/devel/haskell/ghc/_build/stage1/libraries/ghc-prim/build/GHC/Classes.hi
>>>> - Rodrigo helped me out with this. Introduced me to other build
>>>> flags like -j —flavour-quick.
>>>> - The issue proved quite persistent, but it might fail on
>>>> different .hi files.
>>>> - It turns out if you ask Hadrian to build that specific file,
>>>> it works. So somehow it can find a rule! Then you can proceed to rebuild
>>>> and it will fail on a different .hi file. Obviously it would be
>>>> tedious to do this for all the possible files it can fail on.
>>>> - I also tried not building profiled libraries.
>>>> - I tried, instead of using the Apple toolchain, using llvm 12,
>>>> then llvm 16. But I got different errors from that.
>>>> - Rodrigo was unable to reproduce the issue.
>>>> - So, I thought I’d try the Nix approach.
>>>> - First I had to repair my nix installation, because apparently
>>>> updating macOS overwrites /etc/zshrc, overwriting the bit that sources
>>>> '/nix/var/nix/profiles/default/etc/profile.d/nix-daemon.sh’
>>>> - Nix reminded me when I ran commands that I needed to add the
>>>> flag '--extra-experimental-features nix-command’ and
>>>> sometimes '--extra-experimental-features flakes’
>>>> - The instructions from the wiki
>>>> <https://gitlab.haskell.org/ghc/ghc/-/wikis/building/preparation/mac-osx>
>>>> didn’t work, got an error:
>>>> -
>>>> - nix build -f .gitlab/darwin/toolchain.nix -o toolchain.sh
>>>> --extra-experimental-features nix-command
>>>> - error: cannot evaluate a function that has an argument without
>>>> a value ('system’)
>>>> - But folks on #ghc recommended I use ghc.nix instead
>>>> - Pointed me to https://ghc.dev/
>>>> - That linked to these instructions:
>>>> https://github.com/alpmestan/ghc.nix#building-ghc
>>>> - But those instructions failed with:
>>>> - error: nix-shell requires a single derivation
>>>> - User Artem said my command was wrong, instead recommended:
>>>> - nix develop
>>>> https://github.com/alpmestan/ghc.nix/archive/master.tar.gz
>>>> - Once I added the magic experimental flags…
>>>> - It failed, with:
>>>> - error: NAR hash mismatch in input
>>>> 'github:commercialhaskell/all-cabal-hashes/02bb1361217e690d83af9cc132b1d2bf2096763c'
>>>> (/nix/store/zbav3qqbyz7mn7rh4iwybs0ni01ppdbj-source), expected
>>>> 'sha256-HdAnlSc4U8ftnZrBZr2CewsPQs03V9K2gkTVHKG8IfA=', got
>>>> 'sha256-86BgvJ+ebMxTp+nPxo659hsNJbhE6CYJWiIbQXX+sBM=
>>>> - User MangoIV helped me out with this.
>>>> - First I tried regenerating the lock file, with nix flake update
>>>> .
>>>> - Didn’t fix the problem.
>>>> - Then, I checked out the branch update_flake_lock_action
>>>> - This is apparently a branch designed to fix the problem
>>>> - Didn’t fix the problem
>>>> - Then I regenerated the lock file again, with nix flake update
>>>> - That worked! Well, at least that got me to a ghc.nix prompt
>>>> - So, I did:
>>>> - ./boot
>>>> - ./configure
>>>> - cabal v2-update
>>>> - hadrian/build -j --flavour=quick
>>>> - It chugged along for quite a while. Sadly, it ended with
>>>> this error:
>>>> -
>>>> - Linking
>>>> /Users/lyle/Sync/devel/haskell/ghc/hadrian/dist-newstyle/build/aarch64-osx/ghc-9.2.4/hadrian-0.1.0.0/x/hadrian/build/hadrian/hadrian
>>>> ...
>>>> Data.Binary.Get.runGet at position 1181: Unknown encoding for
>>>> constructor
>>>> - What also worries me is that I thought I read somewhere that
>>>> ghc.nix doesn’t work for cross-compilers, so even if it works
>>>> for the native backend, it may not work for the JS backend.
>>>>
>>>>
>>>> Any help would be much appreciated!
>>>> — Lyle
>>>> _______________________________________________
>>>> ghc-devs mailing list
>>>> ghc-devs at haskell.org
>>>> http://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs
>>>>
>>>
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