stackpkgs/packages/compileOptimized/Rust.nix

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{ lib }:
# See https://doc.rust-lang.org/cargo/reference/profiles.html
# and https://doc.rust-lang.org/rustc/codegen-options/index.html
# for list of options
{
opt-level ? "3",
debug ? "none",
split-debuginfo ? "off",
strip ? "symbols",
debug-assertions ? false,
overflow-checks ? false,
lto ? "fat",
panic ? "abort",
codegen-units ? 1,
enableNativeOptimizations ? true,
enableNoPIC ? false,
additionalFlags ? []
}:
pkg:
assert builtins.elem opt-level [ "0" "1" "2" "3" "s" "z" ];
assert builtins.elem debug [ "none" "line-directives-only" "line-tables-only" "limited" "full" ];
assert builtins.elem split-debuginfo [ "off" "packed" "unpacked" ];
assert builtins.elem strip [ "none" "debuginfo" "symbols" ];
assert builtins.elem lto [ "off" "thin" "fat" ];
assert builtins.elem panic [ "unwind" "abort" ];
assert codegen-units > 0;
let
codegenOptions = [
"opt-level=${opt-level}"
"debuginfo=${debug}"
"split-debuginfo=${split-debuginfo}"
"strip=${strip}"
"debug-assertions=${lib.boolToString debug-assertions}"
"overflow-checks=${lib.boolToString overflow-checks}"
"lto=${lto}"
"panic=${panic}"
"codegen-units=${toString codegen-units}"
]
++ lib.optional (lto != "off") "embed-bitcode=true" # LLVM bitcode is required for performing LTO
++ lib.optional enableNoPIC "relocation-model=static"
++ lib.optional enableNativeOptimizations "target-cpu=native";
in
pkg.overrideAttrs (finalAttrs: prevAttrs: {
cargoBuildType = "release";
# Disable tests with abort panic strategy. Tests can only run with unwind strategy
# See unstable panic-abort-tests option
doCheck = prevAttrs.doCheck && panic != "abort";
RUSTFLAGS = (prevAttrs.RUSTFLAGS or "")
+ lib.strings.concatMapStringsSep " " (flag: "-C ${flag}") codegenOptions
+ " "
+ lib.strings.concatStringsSep " " additionalFlags;
})