specify linker in toml

Signed-off-by: Jochen Maes <jochen@sejo-it.be>

.drone.yml

@@ -25,7 +25,7 @@ steps:
       - rustup target add x86_64-unknown-linux-musl
       - rustup target add aarch64-unknown-linux-musl
       - cargo build --target x86_64-unknown-linux-musl --bins -r --config 'package.version="${DRONE_TAG##v}"'
-      - RUSTC_LINKER=/usr/bin/aarch64-none-elf-gcc cargo build --target aarch64-unknown-linux-musl --bins -r --config 'package.version="${DRONE_TAG##v}"'
+      - cargo build --target aarch64-unknown-linux-musl --bins -r --config 'package.version="${DRONE_TAG##v}"'
       - cp target/x86_64-unknown-linux-musl/release/mouse /artifacts/mouse-amd64
       - cp target/aarch64-unknown-linux-musl/release/mouse /artifacts/mouse-arm64 
     volumes:

Cargo.toml

@@ -8,6 +8,9 @@ edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
+[target.aarch64-unknown-linux-musl]
+linker = "/usr/bin/aarch64-none-elf-gcc"
+
 [dependencies]
 clap = { version = "4.4.7", features = ["derive"] }
 csv = "1.3.0"