Stream: beginners

Topic: brand new install repl fails

view this post on Zulip Braydon Hall (Nov 28 2022 at 02:58):

I'm trying to setup Roc for the first time following the tutorial, and it is panicking when doing the "Hello, World!" expression? Also complains about libtinfo being missing:

> roc repl
roc: /lib64/libtinfo.so.6: no version information available (required by roc)

  The rockin’ roc repl
────────────────────────

Enter an expression, or :help, or :q to quit.

» "Hello, World!"
ld: /usr/lib/libgcc_s.so.1: error adding symbols: file in wrong format
thread 'main' panicked at 'we produce a valid Dylib: DlOpen { desc: "/tmp/.tmpGzVlYV/app.so.1.0: cannot open shared object file: No such file or directory" }', crates/repl_cli/src/cli_gen.rs:73:65
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

view this post on Zulip Anton (Nov 28 2022 at 08:16):

Hi Braydon, can you tell me what OS you are using?

view this post on Zulip Braydon Hall (Nov 28 2022 at 20:25):

Yup, I am using Fedora 35

view this post on Zulip Anton (Nov 29 2022 at 08:08):

We've seen this issue before on some fedora systems (#4011). I was unable to reproduce that on my fedora VM but I'll give it another try.

view this post on Zulip Braydon Hall (Nov 29 2022 at 08:57):

I just checked the gcc version I have, and it is reporting:

 ╰─λ gcc --version
gcc (GCC) 11.3.1 20220421 (Red Hat 11.3.1-2)
Copyright (C) 2021 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

view this post on Zulip Anton (Nov 29 2022 at 10:22):

Thanks, I don't think gcc is the problem though. The issue did not reproduce for me on fedora 36 WS, I'm going to set up fedora 35 and I'll try to make a minimal executable that should still error on your machine. That will make it easier to figure out what exactly is going wrong.

view this post on Zulip Anton (Nov 29 2022 at 10:25):

@Braydon Hall can you share the output of the neofetch command?

view this post on Zulip Anton (Nov 29 2022 at 16:20):

I've done some further digging and I think the real problem is hidden because we do not check the exit status of a command used for linking. I've built a new release here that should output more information. @Braydon Hall could you try doing roc repl and input "Hello, world!" again with this release?

view this post on Zulip Braydon Hall (Nov 29 2022 at 19:54):

Here's the result of neofetch:

 ╰─λ neofetch
             .',;::::;,'.                zorua@CORONET
         .';:cccccccccccc:;,.            -------------
      .;cccccccccccccccccccccc;.         OS: Fedora release 35 (Thirty Five) x86_64
    .:cccccccccccccccccccccccccc:.       Kernel: 5.18.13-100.fc35.x86_64
  .;ccccccccccccc;.:dddl:.;ccccccc;.     Uptime: 5 days, 23 hours, 29 mins
 .:ccccccccccccc;OWMKOOXMWd;ccccccc:.    Packages: 2215 (rpm), 18 (flatpak)
.:ccccccccccccc;KMMc;cc;xMMc:ccccccc:.   Shell: zsh 5.8.1
,cccccccccccccc;MMM.;cc;;WW::cccccccc,   Resolution: 1920x1080, 2560x1440, 3440x1440
:cccccccccccccc;MMM.;cccccccccccccccc:   WM: bspwm
:ccccccc;oxOOOo;MMM0OOk.;cccccccccccc:   Theme: Adwaita [GTK2], Nordic [GTK3]
cccccc:0MMKxdd:;MMMkddc.;cccccccccccc;   Icons: Adwaita [GTK2]
ccccc:XM0';cccc;MMM.;cccccccccccccccc'   Terminal: kitty
ccccc;MMo;ccccc;MMW.;ccccccccccccccc;    CPU: AMD Ryzen 9 5900X (24) @ 3.700GHz
ccccc;0MNc.ccc.xMMd:ccccccccccccccc;     GPU: NVIDIA GeForce RTX 3070 Ti
cccccc;dNMWXXXWM0::cccccccccccccc:,      Memory: 19638MiB / 31914MiB
cccccccc;.:odl:.;cccccccccccccc:,.
:cccccccccccccccccccccccccccc:'.
.:cccccccccccccccccccccc:;,..
  '::cccccccccccccc::;,.

And the result of that new build is:

 ╰─λ roc repl
roc: /lib64/libtinfo.so.6: no version information available (required by roc)

  The rockin’ roc repl
────────────────────────

Enter an expression, or :help, or :q to quit.

» "Hello, World!"
ld: /usr/lib/libgcc_s.so.1: error adding symbols: file in wrong format
thread 'main' panicked at '
___________
Linking command failed with status ExitStatus(unix_wait_status(256)):

  Child { stdin: None, stdout: None, stderr: None, .. }
___________
', crates/compiler/build/src/link.rs:1496:5
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

view this post on Zulip Richard Feldman (Nov 29 2022 at 21:29):

:thinking: if you clone the roc source code repository and run roc dev examples/helloWorld.roc does that work?

view this post on Zulip Richard Feldman (Nov 29 2022 at 21:29):

I'm curious if this is repl-specific

view this post on Zulip Braydon Hall (Nov 29 2022 at 22:36):

There was a bit more output the first time I ran it, but closed my terminal before grabbing the output :upside_down: 

 ╰─λ roc dev examples/helloWorld.roc
roc: /lib64/libtinfo.so.6: no version information available (required by roc)
🔨 Rebuilding platform...
Hello, World!

Runs fine! Seems to be a repl problem, based just on this then

view this post on Zulip Richard Feldman (Nov 29 2022 at 22:48):

ok one other thing to try to narrow it down:

roc dev --linker=legacy examples/helloWorld.roc

view this post on Zulip Braydon Hall (Nov 29 2022 at 23:34):

Well, then.

 ╰─λ roc dev --linker=legacy examples/helloWorld.roc
roc: /lib64/libtinfo.so.6: no version information available (required by roc)
🔨 Rebuilding platform...
thread '<unnamed>' panicked at 'I could not find the clang command.
Please install clang.', crates/utils/src/lib.rs:206:9
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
thread 'main' panicked at 'Failed to (re)build platform.: Any { .. }', crates/cli/src/build.rs:342:46

I guess I need clang?

view this post on Zulip Braydon Hall (Nov 29 2022 at 23:34):

Could have sworn I already had it... Ugh

view this post on Zulip Brendan Hansknecht (Nov 29 2022 at 23:35):

you might just have to ln -s clang-{version} clang

view this post on Zulip Braydon Hall (Nov 29 2022 at 23:36):

Nope, installing clang did not help:

 ╰─λ roc dev --linker=legacy examples/helloWorld.roc
roc: /lib64/libtinfo.so.6: no version information available (required by roc)
🔨 Rebuilding platform...
ld: /usr/lib/libgcc_s.so.1: error adding symbols: file in wrong format
thread 'main' panicked at 'not yet implemented: gracefully handle `ld` (or `zig` in the case of wasm with --optimize) returning exit code Some(1)', crates/cli/src/build.rs:417:17
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

view this post on Zulip Folkert de Vries (Nov 29 2022 at 23:39):

or alias clang to zig cc? this has been my magic fix for C compilers/linkers not cooperating lately

view this post on Zulip Folkert de Vries (Nov 29 2022 at 23:40):

we'll soon have zig in production (building things for raspberri pi on CI) at work

view this post on Zulip Folkert de Vries (Nov 29 2022 at 23:41):

also generally to play around with this stuff you can set the CC=path/to/c/compiler and see if that fixes it

view this post on Zulip Richard Feldman (Nov 30 2022 at 00:03):

yeah so it seems to me that:

view this post on Zulip Richard Feldman (Nov 30 2022 at 00:04):

so once the surgical linker supports making dynamic libraries on Linux, we can switch the repl over to use that and I think that should fix it!

view this post on Zulip Folkert de Vries (Nov 30 2022 at 00:07):

@Brendan Hansknecht any idea what that would take? we're already making that stub .so now, so we might be really close with that?

view this post on Zulip Brendan Hansknecht (Nov 30 2022 at 00:30):

I think most of it shouldn't be too hard. The big thing is filling out the dynamic relocation table for calls to roc_alloc and the like. Our stub with changes to offsets should theoretically work for calling into roc code without any dependencies on the host. Though theer may also be some other relocation we need to add within the app, not fully sure.

view this post on Zulip Anton (Nov 30 2022 at 08:11):

or alias clang to zig cc?

@Braydon Hall for this you'll need to:

You'll have to save alias clang="zig cc" to your .profile or .zshrc file if you want to keep it for all future terminal sessions.

view this post on Zulip Braydon Hall (Nov 30 2022 at 20:58):

Either I'm doing this wrong, or it doesn't work :sweat_smile: 

 ╭─zorua@CORONET in ~
[🔴] × zig version
0.9.1

 ╭─zorua@CORONET in ~ took 12ms
 ╰─λ alias clang="zig cc"

 ╭─zorua@CORONET in ~
 ╰─λ roc repl
roc: /lib64/libtinfo.so.6: no version information available (required by roc)

  The rockin’ roc repl
────────────────────────

Enter an expression, or :help, or :q to quit.

» "Hello, World!"
ld: /usr/lib/libgcc_s.so.1: error adding symbols: file in wrong format
thread 'main' panicked at 'we produce a valid Dylib: DlOpen { desc: "/tmp/.tmpx7Cxwj/app.so.1.0: cannot open shared object file: No such file or directory" }', crates/repl_cli/src/cli_gen.rs:73:65
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace```

view this post on Zulip Anton (Dec 01 2022 at 10:32):

Yeah sorry, because we can't reproduce this we have to make educated guesses about how to fix it.
For roc repl, I don't think you're using the release I sent you before, right? The 12-01 nightly should have the same functionality for enhanced error reporting in this case. Can you try again with that one?

Last updated: Jul 26 2025 at 12:14 UTC