Merge pull request #1153 from rozbb/propagate-std-getrandom

Propagate std and getrandom features

rand_chacha/CHANGELOG.md

@@ -4,6 +4,9 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [Unreleased]
+- Made `rand_chacha` propagate the `std` feature down to `rand_core`
+
 ## [0.3.1] - 2021-06-09
 - add getters corresponding to existing setters: `get_seed`, `get_stream` (#1124)
 - add serde support, gated by the `serde1` feature (#1124)

rand_chacha/Cargo.toml

@@ -25,6 +25,6 @@ serde_json = "1.0"
 
 [features]
 default = ["std"]
-std = ["ppv-lite86/std"]
+std = ["ppv-lite86/std", "rand_core/std"]
 simd = [] # deprecated
 serde1 = ["serde"]

rand_chacha/README.md

@@ -36,7 +36,8 @@ Links:
 
 `rand_chacha` is `no_std` compatible when disabling default features; the `std`
 feature can be explicitly required to re-enable `std` support. Using `std`
-allows detection of CPU features and thus better optimisation.
+allows detection of CPU features and thus better optimisation. Using `std`
+also enables `getrandom` functionality, such as `ChaCha20Rng::from_entropy()`.
 
 
 # License