Explicitly specifying `aarch64-apple-darwin` target fails to build aws-lc-sys on MacOS

[aambrose-sonatus]

cargo-zigbuild 0.20.1
Zig 0.15.2
Cargo / rustc 1.90.0

Minimal reproducer, using rustls 0.23.35:

fn main() {
    println!("rustls ALL_VERSIONS: {:?}", rustls::ALL_VERSIONS);
}

On MacOS, executing cargo-zigbuild run succeeds and produces the expected output:
rustls ALL_VERSIONS: [TLSv1_3, TLSv1_2]

Executing cargo-zigbuild run --target aarch64-apple-darwin fails to compile with pages of errors. I think this is the first major error which cascades into the others:

warning: aws-lc-sys@0.34.0: error: unknown CPU: 'armv8.4'
warning: aws-lc-sys@0.34.0: Compilation of 'neon_sha3_check.c' failed - Err(Error { kind: ToolExecError, message: "command did not execute successfully (status code exit status: 1): env -u IPHONEOS_DEPLOYMENT_TARGET LC_ALL=\"C\" \"/<SNIP>/Library/Caches/cargo-zigbuild/0.20.1/zigcc-aarch64-apple-darwin-adb5.sh\" \"-O0\" \"-ffunction-sections\" \"-fdata-sections\" \"-fPIC\" \"-gdwarf-2\" \"-fno-omit-frame-pointer\" \"--target=arm64-apple-macosx\" \"-mmacosx-version-min=26.1\" \"-Werror\" \"-Wall\" \"-Wextra\" \"-march=armv8.4-a+sha3\" \"-Wno-unused-parameter\" \"-o\" \"/<SNIP>/min_test/target/aarch64-apple-darwin/debug/build/aws-lc-sys-17e13aba969dbeff/out/out-neon_sha3_check/7dfda64fdf5a526c-neon_sha3_check.o\" \"-c\" \"/<SNIP>/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/aws-lc-sys-0.34.0/aws-lc/tests/compiler_features_tests/neon_sha3_check.c\"" }).

Issue does not occur when running cargo run --target aarch64-apple-darwin without zigbuild.

[fredr]

I've encountered the same issue. Did you find a workaround with zigbuild?

[aambrose-sonatus]

No, no workaround that I found for this crate + combination of features.

[fredr]

From what I understand, this is related to this issue aws/aws-lc-rs#512 so hopefully it will get resolved upstream