Skip to content

target: add -Zunstable-options when querying cfg #587

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
davidhewitt merged 1 commit into from
Apr 23, 2026
+16 −0
Merged

target: add -Zunstable-options when querying cfg #587

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
16 changes: 16 additions & 0 deletions setuptools_rust/rustc_info.py
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -1,5 +1,6 @@
from __future__ import annotations

import os
import subprocess
from setuptools.errors import PlatformError
from functools import lru_cache
Expand Down Expand Up @@ -38,6 +39,19 @@ def get_rust_host(env: Optional[Env]) -> str:
RustCfgs = NewType("RustCfgs", Dict[str, Optional[str]])


def _is_custom_target(target: str) -> bool:
if target.endswith(".json"):
return True
paths = os.environ.get("RUST_TARGET_PATH")
if not paths:
return False
for p in paths.split(os.pathsep):
candidate = os.path.join(p, target + ".json")
if os.path.exists(candidate):
return True
return False


def get_rustc_cfgs(target_triple: Optional[str], env: Env) -> RustCfgs:
cfgs = RustCfgs({})
for entry in get_rust_target_info(target_triple, env):
Expand All @@ -54,6 +68,8 @@ def get_rustc_cfgs(target_triple: Optional[str], env: Env) -> RustCfgs:
def get_rust_target_info(target_triple: Optional[str], env: Env) -> List[str]:
cmd = ["rustc", "--print", "cfg"]
if target_triple:
if _is_custom_target(target_triple):
cmd.extend(["-Z", "unstable-options"])
cmd.extend(["--target", target_triple.split(".")[0]])
output = check_subprocess_output(cmd, env=env, text=True)
return output.splitlines()
Expand Down
Loading