Luke Boswell (Jun 12 2024 at 06:02): Luke Boswell (Jun 12 2024 at 06:02):I recently updated my mac OS. Now when I try to run cargo build on roc I get an error ld: library 'zstd' not found and ld: warning: ignoring duplicate libraries: '-lm'.
Has anyone else come across these issues?
I have zstd installed I think.
$ which zstd
/opt/homebrew/bin/zstd
I can build things using nix develop so not a total blocker.. though I use to be able to build this way also
Brendan Hansknecht (Jun 12 2024 at 06:06):zstd is the executable I wonder if you need the shared lib separately
Luke Boswell (Jun 12 2024 at 06:08):I have the library... not sure why ld can't find it
$ pwd
/opt/homebrew/Cellar/zstd/1.5.6/lib
$ ls -al
total 2784
drwxr-xr-x 8 luke admin 256 Jun 3 19:11 .
drwxr-xr-x 13 luke admin 416 Jun 7 19:02 ..
drwxr-xr-x 3 luke admin 96 Mar 22 09:05 cmake
-rw-r--r-- 1 luke admin 669440 Jun 3 19:11 libzstd.1.5.6.dylib
lrwxr-xr-x 1 luke admin 19 Mar 22 09:05 libzstd.1.dylib -> libzstd.1.5.6.dylib
-r--r--r-- 1 luke admin 753312 Mar 22 09:05 libzstd.a
lrwxr-xr-x 1 luke admin 15 Mar 22 09:05 libzstd.dylib -> libzstd.1.dylib
drwxr-xr-x 3 luke admin 96 Jun 3 19:11 pkgconfig
Maybe it's meant to be symlink'd somewhere without the version number
Luke Boswell (Jun 12 2024 at 06:09):But I would have thought homebrew would manage all that
Joshua Warner (Jul 04 2024 at 19:46):I'm seeing the same thing; any tips? Did you end up figuring it out?
Joshua Warner (Jul 04 2024 at 19:53):Ahh, found this in the CI config:
env:
LIBRARY_PATH: /opt/homebrew/Cellar/zstd/1.5.6/lib
Setting that env var seems to make things work for me
Richard Feldman (Aug 16 2024 at 16:04):why do we depend on zstd? :thinking:
is it LLVM?
Sam Mohr (Aug 16 2024 at 16:16):│ │ │ │ ├── snafu v0.7.5
│ │ │ │ │ ├── backtrace v0.3.69
│ │ │ │ │ │ ├── addr2line v0.21.0
│ │ │ │ │ │ │ └── gimli v0.28.0
│ │ │ │ │ │ ├── cfg-if v1.0.0
│ │ │ │ │ │ ├── libc v0.2.149
│ │ │ │ │ │ ├── miniz_oxide v0.7.1
│ │ │ │ │ │ │ └── adler v1.0.2
│ │ │ │ │ │ ├── object v0.32.2
│ │ │ │ │ │ │ ├── crc32fast v1.3.2
│ │ │ │ │ │ │ │ └── cfg-if v1.0.0
│ │ │ │ │ │ │ ├── flate2 v1.0.28
│ │ │ │ │ │ │ │ ├── crc32fast v1.3.2 (*)
│ │ │ │ │ │ │ │ └── miniz_oxide v0.7.1 (*)
│ │ │ │ │ │ │ ├── hashbrown v0.14.3 (*)
│ │ │ │ │ │ │ ├── indexmap v2.1.0
│ │ │ │ │ │ │ │ ├── equivalent v1.0.1
│ │ │ │ │ │ │ │ └── hashbrown v0.14.3 (*)
│ │ │ │ │ │ │ ├── memchr v2.6.4
│ │ │ │ │ │ │ └── ruzstd v0.5.0
│ │ │ │ │ │ │ ├── byteorder v1.5.0
│ │ │ │ │ │ │ ├── derive_more v0.99.17 (proc-macro)
From cargo tree, it seems that snafu has a backtrace feature that when enabled, brings in backtrace which uses it
Sam Mohr (Aug 16 2024 at 16:18):rg -i zstd only brings up that usage and then us installing zstd:
❯ rg -i zstd
Cargo.lock
1707: "ruzstd",
3360:name = "ruzstd"
.github/workflows/nightly_macos_apple_silicon.yml
18: LIBRARY_PATH: /opt/homebrew/Cellar/zstd/1.5.6/lib
www/content/install/macos_x86_64.md
24: brew install z3 zstd
oh wow
Richard Feldman (Aug 16 2024 at 16:26):so we could get rid of snafu and get rid of that dependency?
Richard Feldman (Aug 16 2024 at 16:26):we barely even use snafu! :big_smile:
Sam Mohr (Aug 16 2024 at 16:26):I believe so!
Sam Mohr (Aug 16 2024 at 16:26):I'll make a PR
Sam Mohr (Aug 16 2024 at 16:28):Actually, we just have to disable backtraces. Would you rather disable backtraces or remove it in favor of manually implementing std::error::Error for the...
Sam Mohr (Aug 16 2024 at 16:29):2 enums we have
Sam Mohr (Aug 16 2024 at 16:29):I'm leaning towards remove
Sam Mohr (Aug 16 2024 at 17:05):https://github.com/roc-lang/roc/pull/7003
Sam Mohr (Aug 16 2024 at 17:06):Seems like we were also "using" it in the object crate, in that the crate has a compression feature that brings in zstd. By disabling the feature, we removed the dependency.
Sam Mohr (Aug 16 2024 at 17:06):If tests all run correctly (beyond it compiling for me locally), then we're good to go.
Sam Mohr (Aug 16 2024 at 17:07):There's a chance, though, that there's an OSX-only code portion that uses the compression feature, in which case this PR is moot and can be closed
Richard Feldman (Aug 16 2024 at 17:46):I think it's a good change regardless!
Sam Mohr (Aug 16 2024 at 18:21):All the tests pass, so it looks like we don't need zstdor z3
Sam Mohr (Aug 16 2024 at 18:21):It's on auto-merge, just needs an approval
Sam Mohr (Aug 16 2024 at 18:24):Richard Feldman said:
why do we depend on zstd? :thinking:
is it LLVM?
This is why these "basic" questions are useful!
Last updated: Jul 26 2025 at 12:14 UTC