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Explain weirdness of c_void and android missing fns

This commit is contained in:
Alex Crichton 2015-10-29 15:46:16 -07:00
parent bbf73ded8d
commit d5c4e55f65
1 changed files with 6 additions and 2 deletions
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8
src/lib.rs
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@ -59,9 +59,12 @@
#[macro_use] mod macros;
mod dox;
// Use repr(u8) as LLVM expects `void*` to be the same as `i8*` to help enable
// more optimization opportunities around it recognizing things like
// malloc/free.
#[repr(u8)]
pub enum c_void {
// Two dummy variants so the #[repr] attribute can be used
// Two dummy variants so the #[repr] attribute can be used.
#[doc(hidden)]
__variant1,
#[doc(hidden)]
@ -208,7 +211,8 @@ extern {
pub fn memchr(cx: *const c_void, c: c_int, n: size_t) -> *mut c_void;
}
// These are all inline functions on android
// These are all inline functions on android, so they end up just being entirely
// missing on that platform.
#[cfg(not(target_os = "android"))]
extern {
pub fn abs(i: c_int) -> c_int;