cross compile to x86_64-macos get error: "ld64.lld: error: Unable to find library for -liconv"

[kemingy]

I'm currently using zig to cross compile a rust program to "x86_64-macos", but I got the error below:

❯ cargo build --release --target x86_64-apple-darwin                                                                                                         
   Compiling hyper v0.14.12
error: linking with `/home/admin/GitHub/hyper-test/./zig_cc_macos` failed: exit status: 1
  |
  = note: "/home/admin/GitHub/hyper-test/./zig_cc_macos" "-Wl,-exported_symbols_list,/tmp/rustcvcIcnl/list" "-m64" "-arch" "x86_64" "/home/admin/GitHub/hyper-test/target/x86_64-apple-darwin/release/deps/hyper-d09d0433dc14c30e.hyper.087ec123-cgu.0.rcgu.o" "/home/admin/GitHub/hyper-test/target/x86_64-apple-darwin/release/deps/hyper-d09d0433dc14c30e.hyper.087ec123-cgu.1.rcgu.o" "/home/admin/GitHub/hyper-test/target/x86_64-apple-darwin/release/deps/hyper-d09d0433dc14c30e.hyper.087ec123-cgu.10.rcgu.o" "/home/admin/GitHub/hyper-test/target/x86_64-apple-darwin/release/deps/hyper-d09d0433dc14c30e.hyper.087ec123-cgu.11.rcgu.o" "/home/admin/GitHub/hyper-test/target/x86_64-apple-darwin/release/deps/hyper-d09d0433dc14c30e.hyper.087ec123-cgu.12.rcgu.o" "/home/admin/GitHub/hyper-test/target/x86_64-apple-darwin/release/deps/hyper-d09d0433dc14c30e.hyper.087ec123-cgu.13.rcgu.o" "/home/admin/GitHub/hyper-test/target/x86_64-apple-darwin/release/deps/hyper-d09d0433dc14c30e.hyper.087ec123-cgu.14.rcgu.o" "/home/admin/GitHub/hyper-test/target/x86_64-apple-darwin/release/deps/hyper-d09d0433dc14c30e.hyper.087ec123-cgu.15.rcgu.o" "/home/admin/GitHub/hyper-test/target/x86_64-apple-darwin/release/deps/hyper-d09d0433dc14c30e.hyper.087ec123-cgu.2.rcgu.o" "/home/admin/GitHub/hyper-test/target/x86_64-apple-darwin/release/deps/hyper-d09d0433dc14c30e.hyper.087ec123-cgu.3.rcgu.o" "/home/admin/GitHub/hyper-test/target/x86_64-apple-darwin/release/deps/hyper-d09d0433dc14c30e.hyper.087ec123-cgu.4.rcgu.o" "/home/admin/GitHub/hyper-test/target/x86_64-apple-darwin/release/deps/hyper-d09d0433dc14c30e.hyper.087ec123-cgu.5.rcgu.o" "/home/admin/GitHub/hyper-test/target/x86_64-apple-darwin/release/deps/hyper-d09d0433dc14c30e.hyper.087ec123-cgu.6.rcgu.o" "/home/admin/GitHub/hyper-test/target/x86_64-apple-darwin/release/deps/hyper-d09d0433dc14c30e.hyper.087ec123-cgu.7.rcgu.o" "/home/admin/GitHub/hyper-test/target/x86_64-apple-darwin/release/deps/hyper-d09d0433dc14c30e.hyper.087ec123-cgu.8.rcgu.o" "/home/admin/GitHub/hyper-test/target/x86_64-apple-darwin/release/deps/hyper-d09d0433dc14c30e.hyper.087ec123-cgu.9.rcgu.o" "/home/admin/GitHub/hyper-test/target/x86_64-apple-darwin/release/deps/hyper-d09d0433dc14c30e.3e8nu6i8ao4tmcyg.rcgu.o" "-L" "/home/admin/GitHub/hyper-test/target/x86_64-apple-darwin/release/deps" "-L" "/home/admin/GitHub/hyper-test/target/release/deps" "-L" "/home/admin/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-apple-darwin/lib" "/home/admin/GitHub/hyper-test/target/x86_64-apple-darwin/release/deps/libwant-c0078e8e58cb8c51.rlib" "/home/admin/GitHub/hyper-test/target/x86_64-apple-darwin/release/deps/libtry_lock-60a3b6c58ed09e5f.rlib" "/home/admin/GitHub/hyper-test/target/x86_64-apple-darwin/release/deps/libsocket2-7e539b19fcb4da6e.rlib" "/home/admin/GitHub/hyper-test/target/x86_64-apple-darwin/release/deps/libh2-d123ae5913fe5331.rlib" "/home/admin/GitHub/hyper-test/target/x86_64-apple-darwin/release/deps/libindexmap-d15ac2a35b44b355.rlib" "/home/admin/GitHub/hyper-test/target/x86_64-apple-darwin/release/deps/libhashbrown-45b994559d65d1e5.rlib" "/home/admin/GitHub/hyper-test/target/x86_64-apple-darwin/release/deps/libslab-d339af44f38326b0.rlib" "/home/admin/GitHub/hyper-test/target/x86_64-apple-darwin/release/deps/libtokio_util-86313b7b736396b8.rlib" "/home/admin/GitHub/hyper-test/target/x86_64-apple-darwin/release/deps/libfutures_sink-c3d02b526d7e18fb.rlib" "/home/admin/GitHub/hyper-test/target/x86_64-apple-darwin/release/deps/libhttparse-a6274e9dd4e57b72.rlib" "/home/admin/GitHub/hyper-test/target/x86_64-apple-darwin/release/deps/libtower_service-0867f8c5816972cf.rlib" "/home/admin/GitHub/hyper-test/target/x86_64-apple-darwin/release/deps/libfutures_channel-41fe3f32f754b93b.rlib" "/home/admin/GitHub/hyper-test/target/x86_64-apple-darwin/release/deps/libhttp_body-38e332c8b454dddc.rlib" "/home/admin/GitHub/hyper-test/target/x86_64-apple-darwin/release/deps/libfutures_util-804ae82da8621d1d.rlib" "/home/admin/GitHub/hyper-test/target/x86_64-apple-darwin/release/deps/libfutures_task-ae2df107b10cbf55.rlib" "/home/admin/GitHub/hyper-test/target/x86_64-apple-darwin/release/deps/libpin_utils-6d653a3761f7f7ec.rlib" "/home/admin/GitHub/hyper-test/target/x86_64-apple-darwin/release/deps/libfutures_core-90a3c3893743708a.rlib" "/home/admin/GitHub/hyper-test/target/x86_64-apple-darwin/release/deps/libtokio-98a29c89acf7b0d1.rlib" "/home/admin/GitHub/hyper-test/target/x86_64-apple-darwin/release/deps/libsignal_hook_registry-0c9c6e7333cb988e.rlib" "/home/admin/GitHub/hyper-test/target/x86_64-apple-darwin/release/deps/libnum_cpus-b1d360362a3f1557.rlib" "/home/admin/GitHub/hyper-test/target/x86_64-apple-darwin/release/deps/libmemchr-e6497e341e9aa325.rlib" "/home/admin/GitHub/hyper-test/target/x86_64-apple-darwin/release/deps/libonce_cell-82f2036e3f0a6f85.rlib" "/home/admin/GitHub/hyper-test/target/x86_64-apple-darwin/release/deps/libmio-d6b55ec580f7de9b.rlib" "/home/admin/GitHub/hyper-test/target/x86_64-apple-darwin/release/deps/liblog-cee7ce2be585bfe5.rlib" "/home/admin/GitHub/hyper-test/target/x86_64-apple-darwin/release/deps/libparking_lot-8db377deed644e3c.rlib" "/home/admin/GitHub/hyper-test/target/x86_64-apple-darwin/release/deps/libparking_lot_core-a9cca2d8d2ea6fda.rlib" "/home/admin/GitHub/hyper-test/target/x86_64-apple-darwin/release/deps/liblibc-f70457897d8642ba.rlib" "/home/admin/GitHub/hyper-test/target/x86_64-apple-darwin/release/deps/libsmallvec-81a1e0ab309aebfc.rlib" "/home/admin/GitHub/hyper-test/target/x86_64-apple-darwin/release/deps/liblock_api-4ee58e65888ff606.rlib" "/home/admin/GitHub/hyper-test/target/x86_64-apple-darwin/release/deps/libscopeguard-c938af9413afcd02.rlib" "/home/admin/GitHub/hyper-test/target/x86_64-apple-darwin/release/deps/libinstant-11e8345134e952d0.rlib" "/home/admin/GitHub/hyper-test/target/x86_64-apple-darwin/release/deps/libhttpdate-d3b82ac3722addfc.rlib" "/home/admin/GitHub/hyper-test/target/x86_64-apple-darwin/release/deps/libhttp-c80947a020a31090.rlib" "/home/admin/GitHub/hyper-test/target/x86_64-apple-darwin/release/deps/libitoa-fbcde0ac0268e5a9.rlib" "/home/admin/GitHub/hyper-test/target/x86_64-apple-darwin/release/deps/libbytes-4635001c490a8547.rlib" "/home/admin/GitHub/hyper-test/target/x86_64-apple-darwin/release/deps/libfnv-5af274f499d973a6.rlib" "/home/admin/GitHub/hyper-test/target/x86_64-apple-darwin/release/deps/libtracing-cb5f4cbe9ef63cc6.rlib" "/home/admin/GitHub/hyper-test/target/x86_64-apple-darwin/release/deps/libpin_project_lite-4932dae7223228b6.rlib" "/home/admin/GitHub/hyper-test/target/x86_64-apple-darwin/release/deps/libtracing_core-0c80d4f35fcc3d6d.rlib" "/home/admin/GitHub/hyper-test/target/x86_64-apple-darwin/release/deps/liblazy_static-16fbe9e96372137a.rlib" "/home/admin/GitHub/hyper-test/target/x86_64-apple-darwin/release/deps/libcfg_if-66ac3e9458fb53a7.rlib" "/home/admin/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-apple-darwin/lib/libstd-35b14ca5e62c7d66.rlib" "/home/admin/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-apple-darwin/lib/libpanic_unwind-329b6ae10a542427.rlib" "/home/admin/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-apple-darwin/lib/libobject-09e9356fd4907aa1.rlib" "/home/admin/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-apple-darwin/lib/libaddr2line-f077c0a492da74c3.rlib" "/home/admin/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-apple-darwin/lib/libgimli-01a2a2a1730ab072.rlib" "/home/admin/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-apple-darwin/lib/libstd_detect-736ff6c48d99c951.rlib" "/home/admin/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-apple-darwin/lib/librustc_demangle-f6b7985fe24842c3.rlib" "/home/admin/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-apple-darwin/lib/libhashbrown-6ccb889196a16125.rlib" "/home/admin/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-apple-darwin/lib/librustc_std_workspace_alloc-2bda93c117f030a0.rlib" "/home/admin/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-apple-darwin/lib/libunwind-bcbd09b25c64fcac.rlib" "/home/admin/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-apple-darwin/lib/libcfg_if-ef7e97011650176d.rlib" "/home/admin/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-apple-darwin/lib/liblibc-104a032674bfeab8.rlib" "/home/admin/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-apple-darwin/lib/liballoc-ba3aef5f5e0e8573.rlib" "/home/admin/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-apple-darwin/lib/librustc_std_workspace_core-9ee1c33f7a829255.rlib" "/home/admin/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-apple-darwin/lib/libcore-20d0dacb579b8ca8.rlib" "/home/admin/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-apple-darwin/lib/libcompiler_builtins-2fee5b6fdc3293e9.rlib" "-liconv" "-lSystem" "-lresolv" "-lc" "-lm" "-liconv" "-L" "/home/admin/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-apple-darwin/lib" "-o" "/home/admin/GitHub/hyper-test/target/x86_64-apple-darwin/release/deps/libhyper-d09d0433dc14c30e.dylib" "-Wl,-dead_strip" "-dynamiclib" "-Wl,-dylib" "-nodefaultlibs"
  = note: warning: unsupported linker arg: -exported_symbols_list
          warning: unsupported linker arg: /tmp/rustcvcIcnl/list
          warning: unsupported linker arg: -dead_strip
          warning: unsupported linker arg: -dylib
          ld64.lld: error: Unable to find library for -liconv
          error: FileNotFound
          

error: could not compile `hyper` due to previous error

• zig version: 0.8.0
• rustc version: 1.55.0
• platform: Ubuntu 20.04
• cargo config

[target.x86_64-apple-darwin]
linker = "./zig_cc_macos"

• zig_cc_macos file:

#!/bin/sh
zig cc -target x86_64-macos $@

• command: cargo build --release --target x86_64-apple-darwin
• main.rs (copied from hyper.rs server code)

use hyper::service::{make_service_fn, service_fn};
use hyper::{Body, Request, Response, Server};
use std::convert::Infallible;
use std::net::SocketAddr;

async fn hello_world(_req: Request<Body>) -> Result<Response<Body>, Infallible> {
    Ok(Response::new("Hello, World".into()))
}

#[tokio::main]
async fn main() {
    // We'll bind to 127.0.0.1:3000
    let addr = SocketAddr::from(([127, 0, 0, 1], 3000));

    // A `Service` is needed for every connection, so this
    // creates one from our `hello_world` function.
    let make_svc = make_service_fn(|_conn| async {
        // service_fn converts our function into a `Service`
        Ok::<_, Infallible>(service_fn(hello_world))
    });

    let server = Server::bind(&addr).serve(make_svc);

    // Run this server for... forever!
    if let Err(e) = server.await {
        eprintln!("server error: {}", e);
    }
}

[matu3ba]

@kemingy Does the error also occur on zig version 0.8.1 ?

[kemingy]

@kemingy Does the error also occur on zig version 0.8.1 ?

Yes.

[andrewrk]

how are you expecting the iconv dependency to be resolved?

[zhaozg]

Failed in 0.9.0, x86_64-macos-gnu.

Maybe libiconv.tbd will help.

warning(link): library not found for '-liconv'
warning(link): Library search paths:
error(link): undefined reference to symbol '_iconv'
error(link):   first referenced in '/Users/zhaozg/work/build/luvit/x86_64-macos-gnu/luvi/CMakeFiles/luvi.dir/custom/luvi_custom.c.o'
error(link): undefined reference to symbol '_iconv_open'
error(link):   first referenced in '/Users/zhaozg/work/build/luvit/x86_64-macos-gnu/luvi/CMakeFiles/luvi.dir/custom/luvi_custom.c.o'
error(link): undefined reference to symbol '_iconv_close'
error(link):   first referenced in '/Users/zhaozg/work/build/luvit/x86_64-macos-gnu/luvi/CMakeFiles/luvi.dir/custom/luvi_custom.c.o'

[kubkon]

Please see this comment for a solution to this issue with the latest nightly Zig.