Cross.toml

# In case you have enabled the `mold` linker in your dev environemnt (~/.cargo/config.toml),
# the following config snippet fixes a problem with `cross` that when it mounts in docker,
# cargo will verify that this linker exists _even though it's not used for the cross target_.
# Explicitly passing CARGO_TARGET_.. here for the _host_ linker fixes the issue by re-overriding it to default.
#
# See also https://github.com/cross-rs/cross/issues/621#issuecomment-1371577085
[build.env]
passthrough = [
    "CARGO_TARGET_X86_64_UNKNOWN_LINUX_GNU_LINKER=x86_64-linux-gnu-gcc",
    "RUSTFLAGS",
]

[build]
pre-build = [
    # download a recent `protoc` from github
    "apt update && apt install -y unzip",
    "curl -LO https://github.com/protocolbuffers/protobuf/releases/download/v26.1/protoc-26.1-linux-x86_64.zip && unzip protoc-26.1-linux-x86_64.zip -d /usr/ && chmod 755 protoc-26.1-linux-x86_64.zip"
]