libc 0.2.190

Raw FFI bindings to platform libraries like libc.
Documentation 
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//! HelenOS errno handling
//!
//! * Header file: <https://github.com/HelenOS/helenos/tree/master/uspace/lib/c/include/errno.h>

extern "C" {
    pub fn __errno() -> *mut crate::errno_t;
}