The Cargo config file I use for cross compiling

cargo-config.toml

# Place this file as $CARGO_HOME/config.toml
# Run this command before compiling anything to install compilers
# apt install gcc-x86-64-linux-gnu gcc-aarch64-linux-gnu gcc-mingw-w64 pkg-config-aarch64-linux-gnu
# You might also add packages like this:
# dpkg --add-architecture arm64
# apt update
# apt install libssl-dev:arm64 pkg-config pkg-config:arm64
# export PKG_CONFIG=aarch64-linux-gnu-pkg-config

[target.x86_64-unknown-linux-musl]
linker = "rust-lld"

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

[target.x86_64-unknown-linux-gnu]
linker = "x86_64-linux-gnu-gcc"

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

[target.x86_64-pc-windows-gnu]
linker = "x86_64-w64-mingw32-gcc"

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