#[allow(dead_code)]
unsafe extern "C" {
pub fn acos(n: f64) -> f64;
pub fn asin(n: f64) -> f64;
pub fn atan(n: f64) -> f64;
pub fn atan2(a: f64, b: f64) -> f64;
pub fn cbrt(n: f64) -> f64;
pub fn cbrtf(n: f32) -> f32;
pub fn cosh(n: f64) -> f64;
pub fn expm1(n: f64) -> f64;
pub fn expm1f(n: f32) -> f32;
pub fn fdim(a: f64, b: f64) -> f64;
pub fn fdimf(a: f32, b: f32) -> f32;
#[cfg_attr(target_env = "msvc", link_name = "_hypot")]
pub fn hypot(x: f64, y: f64) -> f64;
#[cfg_attr(target_env = "msvc", link_name = "_hypotf")]
pub fn hypotf(x: f32, y: f32) -> f32;
pub fn log1p(n: f64) -> f64;
pub fn log1pf(n: f32) -> f32;
pub fn sinh(n: f64) -> f64;
pub fn tan(n: f64) -> f64;
pub fn tanh(n: f64) -> f64;
pub fn tgamma(n: f64) -> f64;
pub fn tgammaf(n: f32) -> f32;
pub fn lgamma_r(n: f64, s: &mut i32) -> f64;
#[cfg(not(target_os = "aix"))]
pub fn lgammaf_r(n: f32, s: &mut i32) -> f32;
pub fn erf(n: f64) -> f64;
pub fn erff(n: f32) -> f32;
pub fn erfc(n: f64) -> f64;
pub fn erfcf(n: f32) -> f32;
}