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//@ run-pass
//@ ignore-wasm32 wasi-libc does not have lgamma
//@ ignore-sgx no libc
use std::ffi::{c_double, c_int};
use std::mem;
fn to_c_int(v: &mut isize) -> &mut c_int {
unsafe { mem::transmute_copy(&v) }
}
fn lgamma(n: c_double, value: &mut isize) -> c_double {
unsafe {
return m::lgamma(n, to_c_int(value));
}
}
mod m {
use std::ffi::{c_double, c_int};
extern "C" {
#[cfg(all(unix, not(target_os = "vxworks")))]
#[link_name="lgamma_r"]
pub fn lgamma(n: c_double, sign: &mut c_int) -> c_double;
#[cfg(windows)]
#[link_name = "lgamma"]
pub fn lgamma(n: c_double, sign: &mut c_int) -> c_double;
#[cfg(target_os = "vxworks")]
#[link_name = "lgamma"]
pub fn lgamma(n: c_double, sign: &mut c_int) -> c_double;
}
}
pub fn main() {
let mut y: isize = 5;
let x: &mut isize = &mut y;
assert_eq!(lgamma(1.0 as c_double, x), 0.0 as c_double);
}
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