Cross.toml

[build.env]
# build.rs reads this to reject a build with no generated pkl sources. Cross
# otherwise filters it out and the guard never reaches build.rs.
passthrough = ["HK_REQUIRE_EMBEDDED_PKL"]

[target.x86_64-unknown-linux-gnu]
# Keep the release artifact compatible with older glibc distributions while
# still running the instrumented binary on the newer CI host for training.
image = "ghcr.io/cross-rs/x86_64-unknown-linux-gnu:0.2.5"

[target.x86_64-unknown-linux-gnu.env]
# scripts/pgo-bolt.bash sets profile-generate/profile-use and emit-relocs
# through RUSTFLAGS. Cross otherwise filters the variable at the container
# boundary and silently produces an uninstrumented build.
# HK_REQUIRE_EMBEDDED_PKL is repeated from [build.env] in case a target list
# replaces the build one rather than extending it.
passthrough = ["RUSTFLAGS", "HK_REQUIRE_EMBEDDED_PKL"]