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| author | Collin Baker <collinbaker@chromium.org> | 2023-01-12 05:36:04 -0500 |
|---|---|---|
| committer | Collin Baker <collinbaker@chromium.org> | 2023-01-12 05:36:04 -0500 |
| commit | 0a03d1c9cafde0ada19b4fab0f3d6892cb154fd8 (patch) | |
| tree | a475f71e82b96fcf8da27f358d04fa91a0d2c769 /compiler/rustc_feature/src/lib.rs | |
| parent | 4887cb18dc2ef5b1bf3fc50ce6c267fde085032b (diff) | |
| download | rust-0a03d1c9cafde0ada19b4fab0f3d6892cb154fd8.tar.gz rust-0a03d1c9cafde0ada19b4fab0f3d6892cb154fd8.zip | |
Allow setting CFG_DISABLE_UNSTABLE_FEATURES to 0
Two locations check whether this build-time environment variable is defined. Allowing it to be explicitly disabled with a "0" value is useful, especially for integrating with external build systems.
Diffstat (limited to 'compiler/rustc_feature/src/lib.rs')
| -rw-r--r-- | compiler/rustc_feature/src/lib.rs | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/compiler/rustc_feature/src/lib.rs b/compiler/rustc_feature/src/lib.rs index 8e2a13a6c0a..93d16716346 100644 --- a/compiler/rustc_feature/src/lib.rs +++ b/compiler/rustc_feature/src/lib.rs @@ -83,7 +83,8 @@ impl UnstableFeatures { /// Otherwise, only `RUSTC_BOOTSTRAP=1` will work. pub fn from_environment(krate: Option<&str>) -> Self { // `true` if this is a feature-staged build, i.e., on the beta or stable channel. - let disable_unstable_features = option_env!("CFG_DISABLE_UNSTABLE_FEATURES").is_some(); + let disable_unstable_features = + option_env!("CFG_DISABLE_UNSTABLE_FEATURES").map(|s| s != "0").unwrap_or(false); // Returns whether `krate` should be counted as unstable let is_unstable_crate = |var: &str| { krate.map_or(false, |name| var.split(',').any(|new_krate| new_krate == name)) |