blake3-smol: Add features to make cargo happy

diff --git a/external/blake3-smol/Cargo.toml b/external/blake3-smol/Cargo.toml
index acde81fcb5035f41675b7a62212a50c2ab1c4ef7..3f5c5ec9f3095f9e7c7f94614df12117ebe4731f 100644 (file)
--- a/external/blake3-smol/Cargo.toml
+++ b/external/blake3-smol/Cargo.toml
@@ -5,6 +5,13 @@ edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
+[features]
+std = []
+no_avx512 = []
+no_avx2 = []
+no_sse41 = []
+no_sse2 = []
+
 [dependencies]
 constant_time_eq = "0.3.0"