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<p>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.<br>
</p>
<div class="moz-cite-prefix">On 5/31/23 10:13, Sebastian Graf wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAAS+=P8vjEgwjuBfQWmdSz-dC-5JL19xWudBfZ6_OktRqCbrZg@mail.gmail.com">
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<div dir="ltr">
<div>Hi Lyle,</div>
<div><br>
</div>
<div>I'm sorry that you have so much trouble in getting your
first build done.</div>
<div>The Classes.hi issue sounds like something I had
experienced in the past, but I'm not having it at the moment.</div>
<div>Are you also using symlinks by any chance? Then it is very
likely that you have been bitten by <a
href="https://gitlab.haskell.org/ghc/ghc/-/issues/22451"
moz-do-not-send="true" class="moz-txt-link-freetext">https://gitlab.haskell.org/ghc/ghc/-/issues/22451</a>,
the workaround to which would be to do something like `cd
"$(readlink -f .)"` before you start your build.</div>
<div><br>
</div>
<div>Regarding your second issue using ghc.nix, a quick google
turned up <a
href="https://gitlab.haskell.org/ghc/ghc/-/issues/20429#note_379762"
moz-do-not-send="true" class="moz-txt-link-freetext">https://gitlab.haskell.org/ghc/ghc/-/issues/20429#note_379762</a>.</div>
<div>Is it possible that you didn't start from a clean build?<br>
</div>
<div>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).</div>
<div>I often simply do `git clean -fxd` to be extra sure.</div>
<div>After that, you'll have to boot, configure (including
passing $CONFIGURE_ARGS) and build again.</div>
<div>By the way, are you using ZSH? I'm using it and I have to<a
href="https://github.com/alpmestan/ghc.nix#building-ghc"
moz-do-not-send="true"> pass the CONFIGURE_ARGS in a
slightly different way</a>: `./configure
${=CONFIGURE_ARGS}`.</div>
<div><br>
</div>
<div>I also updated <a
href="https://gitlab.haskell.org/ghc/ghc/-/wikis/building/preparation/linux#nixnixos"
moz-do-not-send="true" class="moz-txt-link-freetext">https://gitlab.haskell.org/ghc/ghc/-/wikis/building/preparation/linux#nixnixos</a>
to account for new-style flakified builds+direnv, if that's a
workflow that you are familiar with.</div>
<div><br>
</div>
<div>Hope that helps,</div>
<div>Sebastian<br>
</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">Am Mi., 31. Mai 2023 um
05:14 Uhr schrieb Lyle Kopnicky <<a
href="mailto:lists@qseep.net" moz-do-not-send="true"
class="moz-txt-link-freetext">lists@qseep.net</a>>:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div>
<div dir="ltr">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.
<div><br>
</div>
<div dir="ltr">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.</div>
<div dir="ltr"><br>
</div>
<div dir="ltr">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:</div>
<div dir="ltr"><br>
</div>
<div dir="ltr">
<ul style="margin:0px" dir="ltr">
<li>Started with the advice from this wiki: <a
href="https://gitlab.haskell.org/ghc/ghc/-/wikis/building"
target="_blank" moz-do-not-send="true"
class="moz-txt-link-freetext">https://gitlab.haskell.org/ghc/ghc/-/wikis/building</a><br>
</li>
<li>Checked out the ghc source, on HEAD.<br>
</li>
<li>The rest of the steps were at <a
href="https://gitlab.haskell.org/ghc/ghc/-/wikis/building/preparation/mac-osx"
target="_blank" moz-do-not-send="true"
class="moz-txt-link-freetext">https://gitlab.haskell.org/ghc/ghc/-/wikis/building/preparation/mac-osx</a><br>
</li>
<li>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.<br>
</li>
<li><span style="font-family:ui-monospace">brew
install autoconf automake python sphinx-doc</span></li>
<ul dir="ltr">
<li>Worked fine, also added sphinx-build to the path</li>
</ul>
<li>Initially tried using ghc 9.2.7 to build - later
tried switching to 9.4.4 and eventually 9.4.5</li>
<li><font face="menlo, monospace">cabal update; cabal
install alex happy haddock</font><br>
</li>
<ul dir="ltr">
<li>This is where I ran into trouble - couldn’t
build haddock. Cabal said it couldn’t resolve the
dependencies.</li>
<li>I tried switching to ghc 9.4.4 and cabal
3.10.1.0 - same problem</li>
<li>User romes (Rodrigo) on #ghc helped with this -
was able to reproduce it and filed a ticket: <a
href="https://github.com/haskell/haddock/issues/1596"
target="_blank" moz-do-not-send="true"
class="moz-txt-link-freetext">https://github.com/haskell/haddock/issues/1596</a></li>
<li>However he pointed out that haddock was already
supplied through ghcup so I don’t need to build
it.</li>
</ul>
<li>Already had MacTex installed and I installed the
DejaVu font family.</li>
<li><font face="menlo, monospace">./boot &&
./configure</font></li>
<ul dir="ltr">
<li>Worked fine, although <code style="border:1px
solid
rgb(206,206,206);background-color:rgb(248,248,248);padding:0px
3px;border-radius:4px">./boot</code> gave me
lots of autoconf warnings like:<br>
<font face="menlo, monospace"><a
href="http://configure.ac:9" target="_blank"
moz-do-not-send="true">configure.ac:9</a>:
warning: The macro `AC_HELP_STRING' is obsolete.<br>
<a href="http://configure.ac:9" target="_blank"
moz-do-not-send="true">configure.ac:9</a>: You
should run autoupdate.</font></li>
<li>Apparently autoconf has renamed these macros to
pluralize them, and also encloses the arguments in
square brackets.</li>
</ul>
<li><font face="menlo, monospace">hadrian/build</font></li>
<ul dir="ltr">
<li>Ran into another problem: The build failed with:<br>
<font face="menlo, monospace">Error, file does not
exist and no rule available:<br>
/Users/lyle/devel/haskell/ghc/_build/stage1/libraries/ghc-prim/build/GHC/Classes.hi</font></li>
<li>Rodrigo helped me out with this. Introduced me
to other build flags like <code style="border:1px
solid
rgb(206,206,206);background-color:rgb(248,248,248);padding:0px
3px;border-radius:4px">-j —flavour-quick</code>.</li>
<li>The issue proved quite persistent, but it might
fail on different <code style="border:1px solid
rgb(206,206,206);background-color:rgb(248,248,248);padding:0px
3px;border-radius:4px">.hi</code> files.</li>
<li>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 <code style="border:1px solid
rgb(206,206,206);background-color:rgb(248,248,248);padding:0px
3px;border-radius:4px">.hi</code> file.
Obviously it would be tedious to do this for all
the possible files it can fail on.</li>
<li>I also tried not building profiled libraries.</li>
<li>I tried, instead of using the Apple toolchain,
using llvm 12, then llvm 16. But I got different
errors from that.</li>
<li>Rodrigo was unable to reproduce the issue.</li>
</ul>
<li>So, I thought I’d try the Nix approach.</li>
<li>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’</li>
<li>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’</li>
<li>The instructions from the <a
href="https://gitlab.haskell.org/ghc/ghc/-/wikis/building/preparation/mac-osx"
target="_blank" moz-do-not-send="true">wiki</a>
didn’t work, got an error:</li>
<ul>
<li><br>
</li>
<li><font face="menlo, monospace">nix build -f
.gitlab/darwin/toolchain.nix -o toolchain.sh
--extra-experimental-features nix-command</font></li>
<li><font face="menlo, monospace">error: cannot
evaluate a function that has an argument without
a value ('system’)</font></li>
</ul>
<li><font face="ui-sans-serif, sans-serif">But folks
on #ghc recommended I use </font><code
style="border:1px solid
rgb(206,206,206);background-color:rgb(248,248,248);padding:0px
3px;border-radius:4px">ghc.nix</code> instead</li>
<ul dir="ltr">
<li>Pointed me to <a href="https://ghc.dev/"
target="_blank" moz-do-not-send="true"
class="moz-txt-link-freetext">https://ghc.dev/</a></li>
<li>That linked to these instructions: <a
href="https://github.com/alpmestan/ghc.nix#building-ghc"
target="_blank" moz-do-not-send="true"
class="moz-txt-link-freetext">https://github.com/alpmestan/ghc.nix#building-ghc</a></li>
<li>But those instructions failed with:</li>
<ul>
<li>error: nix-shell requires a single derivation<br>
</li>
</ul>
<li>User Artem said my command was wrong, instead
recommended:</li>
<ul dir="ltr">
<li><font face="menlo, monospace">nix develop <a
href="https://github.com/alpmestan/ghc.nix/archive/master.tar.gz"
target="_blank" moz-do-not-send="true"
class="moz-txt-link-freetext">https://github.com/alpmestan/ghc.nix/archive/master.tar.gz</a></font></li>
</ul>
<li>Once I added the magic experimental flags…<br>
</li>
<li>It failed, with:</li>
<ul>
<li><font face="menlo, monospace">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=</font><br>
</li>
</ul>
<li>User MangoIV helped me out with this.</li>
<li>First I tried regenerating the lock file, with <code
style="border:1px solid
rgb(206,206,206);background-color:rgb(248,248,248);padding:0px
3px;border-radius:4px">nix flake update</code>.</li>
<ul dir="ltr">
<li>Didn’t fix the problem.</li>
</ul>
<li>Then, I checked out the branch <span
style="font-family:ui-monospace;background-color:rgb(248,248,248)">update_flake_lock_action</span></li>
<ul dir="ltr">
<li>This is apparently a branch designed to fix
the problem</li>
<li>Didn’t fix the problem</li>
</ul>
<li>Then I regenerated the lock file again, with <code
style="border:1px solid
rgb(206,206,206);background-color:rgb(248,248,248);padding:0px
3px;border-radius:4px">nix flake update</code></li>
<ul dir="ltr">
<li>That worked! Well, at least that got me to a <code
style="border:1px solid
rgb(206,206,206);background-color:rgb(248,248,248);padding:0px
3px;border-radius:4px">ghc.nix</code> prompt</li>
</ul>
<li>So, I did:</li>
<ul dir="ltr">
<li><font face="menlo, monospace">./boot</font></li>
<li><font face="menlo, monospace">./configure</font></li>
<li><font face="menlo, monospace">cabal v2-update</font></li>
<li><font face="menlo, monospace">hadrian/build -j
--flavour=quick</font><br>
</li>
</ul>
<li>It chugged along for quite a while. Sadly, it
ended with this error:</li>
<ul>
<li><br>
</li>
<li><font face="menlo, monospace">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
...</font><span
style="font-family:menlo,monospace"><br>
Data.Binary.Get.runGet at position 1181:
Unknown encoding for constructor</span></li>
</ul>
<li>What also worries me is that I thought I read
somewhere that <code style="border:1px solid
rgb(206,206,206);background-color:rgb(248,248,248);padding:0px
3px;border-radius:4px">ghc.nix</code> doesn’t
work for cross-compilers, so even if it works for
the native backend, it may not work for the JS
backend.</li>
</ul>
</ul>
<div><br>
</div>
<div dir="ltr">Any help would be much appreciated!</div>
<div dir="ltr">— Lyle</div>
</div>
</div>
</div>
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