190a6c41cf
Tweak some warnings around #[target_feature] This commit fixes up some issues discovered when getting the `stdsimd` crate's CI compiling again.
The syntax
crate contains those things concerned purely with syntax
– that is, the AST ("abstract syntax tree"), parser, pretty-printer,
lexer, macro expander, and utilities for traversing ASTs.
For more information about how these things work in rustc, see the rustc guide: