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rust: detect user-specified custom targets in compiletest

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Fixes: thread 'main' panicked at 'failed to gather the target spec
       for '<arch>-unknown-linux-gnu', synthetic_targets.rs:66:9

Detect and fetch custom target configurations when rustc is
bootstrapped in rust oe-selftest.

(From OE-Core rev: fdd9385d9845d628e10179598fc42d29519c5dfd)

Signed-off-by: Yash Shinde <Yash.Shinde@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Yash Shinde
2024-01-25 05:15:58 -08:00
committed by Richard Purdie
parent 357651377f
commit 0a066f7526
1 changed files with 90 additions and 0 deletions
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90
meta/recipes-devtools/rust/files/custom-target-cfg.patch Normal file
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@@ -0,0 +1,90 @@
Detect and fetch custom target configurations when rustc is
bootstrapped in rust oe-selftest.
Upstream-Status: Backport [https://github.com/rust-lang/rust/pull/119619/commits/26c71cbcf1a9bce6ceb962d753c467d098f63cf6]
Signed-off-by: onur-ozkan <work@onurozkan.dev>
Signed-off-by: Yash Shinde <Yash.Shinde@windriver.com>
---
diff --git a/src/tools/compiletest/src/common.rs b/src/tools/compiletest/src/common.rs
index e85f6319936..c45c0b3c652 100644
--- a/src/tools/compiletest/src/common.rs
+++ b/src/tools/compiletest/src/common.rs
@@ -479,6 +479,7 @@ fn new(config: &Config) -> TargetCfgs {
let mut targets: HashMap<String, TargetCfg> = serde_json::from_str(&rustc_output(
config,
&["--print=all-target-specs-json", "-Zunstable-options"],
+ Default::default(),
))
.unwrap();
@@ -491,16 +492,33 @@ fn new(config: &Config) -> TargetCfgs {
let mut all_families = HashSet::new();
let mut all_pointer_widths = HashSet::new();
- // Handle custom target specs, which are not included in `--print=all-target-specs-json`.
- if config.target.ends_with(".json") {
- targets.insert(
- config.target.clone(),
- serde_json::from_str(&rustc_output(
- config,
- &["--print=target-spec-json", "-Zunstable-options", "--target", &config.target],
- ))
- .unwrap(),
- );
+ // If current target is not included in the `--print=all-target-specs-json` output,
+ // we check whether it is a custom target from the user or a synthetic target from bootstrap.
+ if !targets.contains_key(&config.target) {
+ let mut envs: HashMap<String, String> = HashMap::new();
+
+ if let Ok(t) = std::env::var("RUST_TARGET_PATH") {
+ envs.insert("RUST_TARGET_PATH".into(), t);
+ }
+
+ // This returns false only when the target is neither a synthetic target
+ // nor a custom target from the user, indicating it is most likely invalid.
+ if config.target.ends_with(".json") || !envs.is_empty() {
+ targets.insert(
+ config.target.clone(),
+ serde_json::from_str(&rustc_output(
+ config,
+ &[
+ "--print=target-spec-json",
+ "-Zunstable-options",
+ "--target",
+ &config.target,
+ ],
+ envs,
+ ))
+ .unwrap(),
+ );
+ }
}
for (target, cfg) in targets.iter() {
@@ -545,7 +563,9 @@ fn get_current_target_config(
// code below extracts them from `--print=cfg`: make sure to only override fields that can
// actually be changed with `-C` flags.
for config in
- rustc_output(config, &["--print=cfg", "--target", &config.target]).trim().lines()
+ rustc_output(config, &["--print=cfg", "--target", &config.target], Default::default())
+ .trim()
+ .lines()
{
let (name, value) = config
.split_once("=\"")
@@ -624,11 +644,12 @@ pub enum Endian {
Big,
}
-fn rustc_output(config: &Config, args: &[&str]) -> String {
+fn rustc_output(config: &Config, args: &[&str], envs: HashMap<String, String>) -> String {
let mut command = Command::new(&config.rustc_path);
add_dylib_path(&mut command, iter::once(&config.compile_lib_path));
command.args(&config.target_rustcflags).args(args);
command.env("RUSTC_BOOTSTRAP", "1");
+ command.envs(envs);
let output = match command.output() {
Ok(output) => output,