[Bug]: cdk doesn't compile on on non musl target

[sehz]

What happened
cdk build doesn't work without musl target installed

Expected behavior
cdk build should work on all supported platform

Describe the setup

$> fluvio version
 Fluvio CLI                     : 0.11.11                                                          
 Fluvio CLI Arch                : aarch64-unknown-linux-musl                                       
 Fluvio CLI SHA256              : fb8267e3ba8762d2942a26e5c5e9ef79701789c6f31c294b0349e3455e5cf868 
 Fluvio Channel Frontend SHA256 : fb8267e3ba8762d2942a26e5c5e9ef79701789c6f31c294b0349e3455e5cf868 
 Fluvio Platform                : Not available (local)                                            
 Git Commit                     : 98cfc21314c93d4c2898edc9e2160f280622be21                         
 OS Details                     : Ubuntu 22.10 (kernel 6.9.8-orbstack-00170-g7b4100b7ced4)         

$> uname -a
Linux ubuntu 6.9.8-orbstack-00170-g7b4100b7ced4 #1 SMP Thu Jul 11 03:32:20 UTC 2024 aarch64 aarch64 aarch64 GNU/Linux

How to reproduce it (as minimally and precisely as possible)
Steps to reproduce the behavior:

1. Make sure to use linux.
2. Install Rust without musl target
3. Follow https://nightly.fluvio.io/docs/latest/connectors/developers/generate
4. cdk build

Log output

error[E0463]: can't find crate for `core`
   --> /home/sehyo/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bitflags-2.6.0/src/lib.rs:259:13
    |
259 |     pub use core;
    |             ^^^^ can't find crate
    |
    = note: the `aarch64-unknown-linux-musl` target may not be installed
    = help: consider downloading the target with `rustup target add aarch64-unknown-linux-musl`

Environment (please complete the following information):

• OS: [Linux]
• Fluvio Version [0.11.11]

[digikata]

This Dockerfile can reproduce a similar error for cdk on Ubuntu, trying to build to an x86-unknown-linux-musl target.

Dockerfile.txt

In a directory:
Rename Dockerfile.txt -> Dockerfile
Build the image: docker build -t my-ubuntu .
Run the image: docker run --rm -it my-ubuntu

In the image:

cdk generate testproj
cd testproj
cdk build  # -> link error with musl build

# workaround for local connector development
cdk build --target x86-unknown-linux-gnu

Note: We may need to move this to an associated issue as this is for x86-unknown-linux-gnu system.

The workardound (provided by @nacardin) is:

CARGO_TARGET_X86_64_UNKNOWN_LINUX_MUSL_LINKER=x86_64-linux-musl-gcc cdk build

We will provide more complete instructions for the Ubuntu environment

[sehz]

From Safe:

zig gust builds and links all without any questions

[digikata]

Native builds fix w/ this PR #4168