# Cargo system config - lives at $CARGO_HOME/config.toml.
#
# Default linker overrides for cross-compile targets so plain
# `cargo build --target=...` works for pure-Rust crates without the
# user having to set up a separate cross C toolchain. The image already
# ships:
#
#   - rust-lld   (via the llvm-tools-preview rustup component, symlinked
#                 to /usr/local/bin/rust-lld in 02-packages.sh)
#   - mingw-w64  (apk: mingw-w64-gcc, for native Windows GNU linking)
#   - zig        (apk + cargo-zigbuild bundled copy, for full C cross
#                 toolchains incl. macOS/glibc/RISC-V)
#
# For crates that pull in C deps (*-sys, openssl-sys, ring, etc.) prefer
# `cargo zigbuild --target=...` instead - it handles both the linker AND
# the C compile.

# --- Linux musl / glibc (pure-Rust via rust-lld) ---
[target.aarch64-unknown-linux-musl]
linker = "rust-lld"

[target.aarch64-unknown-linux-gnu]
linker = "rust-lld"

[target.armv7-unknown-linux-musleabihf]
linker = "rust-lld"

[target.armv7-unknown-linux-gnueabihf]
linker = "rust-lld"

[target.arm-unknown-linux-gnueabihf]
linker = "rust-lld"

[target.i686-unknown-linux-musl]
linker = "rust-lld"

[target.i686-unknown-linux-gnu]
linker = "rust-lld"

# Note: riscv64gc-unknown-linux-{musl,gnu}, powerpc64le-unknown-linux-gnu,
# and s390x-unknown-linux-gnu need libgcc_s + libc for the target arch
# which aren't shipped with rust-lld's bundled musl. Use
# `cargo zigbuild --target=...` for these.

# --- Windows GNU (mingw) ---
[target.x86_64-pc-windows-gnu]
linker = "x86_64-w64-mingw32-gcc"

[target.i686-pc-windows-gnu]
linker = "i686-w64-mingw32-gcc"

# --- Embedded ARM Cortex-M (no_std) ---
# These produce no_std bare-metal binaries. Source code must be `no_std`
# with a `#[panic_handler]` and `#[entry]` macro - see the cortex-m-rt
# crate. A `std` hello-world will not compile for these targets.
[target.thumbv6m-none-eabi]
linker = "rust-lld"

[target.thumbv7em-none-eabihf]
linker = "rust-lld"

[target."thumbv8m.main-none-eabihf"]
linker = "rust-lld"

# --- Embedded RISC-V (no_std) ---
[target.riscv32imc-unknown-none-elf]
linker = "rust-lld"

[target.riscv32imac-unknown-none-elf]
linker = "rust-lld"