How to compile with optimizations enabled?

[pdeva]

i am new to using rules_rust. i specified this rule in my build file:

rust_binary(
    name = "span-eater",
    srcs = ["src/main.rs"],
    aliases = aliases(),
    proc_macro_deps = all_crate_deps(
        proc_macro = True,
    ),
    deps = all_crate_deps(
        normal = True,
    ),
    rustc_flags = ["-C","opt-level=3", "-C","debuginfo=0"]
)

However, i see its still getting compiled with the debug symbols:

$ file bazel-bin/services/span-eater/span-eater

bazel-bin/services/span-eater/span-eater: ELF 64-bit LSB shared object, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, for GNU/Linux 3.2.0, BuildID[md5/uuid]=2f67965bb411e5b33b48250a8e306f25, with debug_info, not stripped

how do i ensure the opt-level and debuginfo flags are getting applied?

[liningpan]

rules_rust respects bazel compilation mode (https://bazel.build/docs/user-manual#compilation-mode), so bazel build //<target> -c opt will build things in release mode.