blas_sys::cgemm_

pub unsafe extern fn cgemm_(transa: *const c_char, transb: *const c_char, m: *const c_int, n: *const c_int, k: *const c_int, alpha: *const complex_float, a: *const complex_float, lda: *const c_int, b: *const complex_float, ldb: *const c_int, beta: *const complex_float, c: *mut complex_float, ldc: *const c_int)