cargo:rerun-if-changed=build.rs
cargo:rerun-if-env-changed=RUST_LIBC_UNSTABLE_FREEBSD_VERSION
cargo:rustc-cfg=freebsd12
cargo:rerun-if-env-changed=RUST_LIBC_UNSTABLE_MUSL_V1_2_3
cargo:rerun-if-env-changed=RUST_LIBC_UNSTABLE_LINUX_TIME_BITS64
cargo:rerun-if-env-changed=RUST_LIBC_UNSTABLE_GNU_FILE_OFFSET_BITS
cargo:rerun-if-env-changed=RUST_LIBC_UNSTABLE_GNU_TIME_BITS
