Stream: beginners

Topic: m1 mac problems

James Carlson (Jan 22 2022 at 19:04):

Hi, I am trying to install the roc toolchain on an M1 mac. Got the error below:

(base) ➜  roc git:(trunk) cargo run test
 .....

error: failed to run custom build command for `roc_builtins v0.1.0 (/Users/jxxcarlson/dev/roc/roc/compiler/builtins)`

Caused by:
  process didn't exit successfully: `/Users/jxxcarlson/dev/roc/roc/target/debug/build/roc_builtins-5b244d1fce26b1b1/build-script-build` (exit status: 101)
  --- stdout
  cargo:rerun-if-changed=build.rs
  Compiling host ir to: /Users/jxxcarlson/dev/roc/roc/compiler/builtins/bitcode/builtins-host.ll

  --- stderr
  thread 'main' panicked at 'zig failed: ./build.zig:58:24: error: expected type 'std.build.EmitOption', found 'bool'
      obj.emit_llvm_ir = true;
                         ^
  /opt/homebrew/Cellar/zig/0.9.0/lib/zig/std/build.zig:1595:28: note: std.build.EmitOption declared here
      pub const EmitOption = union(enum) {
                             ^
  ', compiler/builtins/build.rs:157:17
  note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
warning: build failed, waiting for other jobs to finish...
error: build failed

Lucas Rosa (Jan 22 2022 at 19:19):

you probably have the wrong version of zig @James Carlson

Lucas Rosa (Jan 22 2022 at 19:19):

you need 0.8.* and that looks like an error from 0.9

David Dunn (Sep 13 2022 at 06:24):

hey folks :wave: I just pulled the latest release (roc_nightly-macos_apple_silicon-2022-09-12-8fbd09b) when following the guide for apple silicon, and got an error about a missing dylib: dyld[55226]: Library not loaded: '/opt/homebrew/opt/llvm/lib/libc++abi.1.dylib'. This sounded like llvm was missing, and indeed after brew install llvm the hello world example in the nightly release ran fine.

Is there a particular llvm version that Roc is using? From the Earthfile & Nix files I'd guess 13, but the llvm brew package is 14 and that worked (at least for hello world).

Brian Carroll (Sep 13 2022 at 06:40):

We're currently on LLVM 13. The changes in LLVM 14 are not too large so I guess that's why it worked for hello world! But it's likely you'd run into problems eventually.

Brendan Hansknecht (Sep 13 2022 at 14:22):

Brew should let you install at a specific version brew install llvm@13 or something like that

David Dunn (Sep 13 2022 at 14:28):

Opened a PR to update the getting started doc

Anton (Sep 13 2022 at 14:43):

Is this issue caused by what you mentioned here @Brendan Hansknecht?

Brendan Hansknecht (Sep 13 2022 at 14:47):

No, I don't think so. It just looks like we dynamically link to one of the llvm libraries, thus it needs to be installed.

Brendan Hansknecht (Sep 13 2022 at 14:48):

probably a platform dynamically links to it? Since I don't think we should link to libc++ in the compiler

Anton (Sep 13 2022 at 14:51):

@doubledup can you share what command you executed or which example you tried to run when you encountered the dyld[55226]: Library not loaded error?

David Dunn (Sep 13 2022 at 14:56):

@Anton It was ./roc examples/hello-world/main.roc, from inside the unzipped release directory

Anton (Sep 13 2022 at 14:57):

Thanks @doubledup

David Dunn (Sep 13 2022 at 14:58):

Looks like llvm@13 is keg-only/doesn't link automatically and has some conflicts, at least with libomp (that's the only one that conflicted for me)

David Dunn (Sep 13 2022 at 20:53):

Actually llvm is also key-only, so not sure why there's only a conflict with llvm@13 - maybe llvm 13 has a libomp dylib when 14 doesn't?

Last updated: Jul 26 2025 at 12:14 UTC