pub unsafe extern "C" fn dtrsv_(
uplo: *const c_char,
trans: *const c_char,
diag: *const c_char,
n: *const c_int,
a: *const f64,
lda: *const c_int,
x: *mut f64,
incx: *const c_int,
arg1: usize,
arg2: usize,
arg3: usize
)