# Copyright 2024 RustFS Team
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# RustFS Cargo configuration

# NOTE: `--cfg tokio_unstable` is deliberately NOT set here.
#
# It used to be a global `[build] rustflags` entry so that the (default-off)
# `dial9` telemetry feature could compile. That made every build depend on
# Tokio's unstable, non-semver API, and it broke silently whenever a caller
# exported their own RUSTFLAGS — an environment RUSTFLAGS replaces the value
# from this file rather than appending to it.
#
# The flag is now scoped to telemetry builds, which opt in explicitly:
#
#     make build-profiling
#     RUSTFLAGS="--cfg tokio_unstable" cargo build --features dial9
#
# `crates/obs/build.rs` fails the compile if the `dial9` feature is on without
# the flag, so the two can no longer drift apart unnoticed.
#
# For CPU profiling, add `-C force-frame-pointers=yes` to that RUSTFLAGS value.