pub unsafe extern fn ctgsna_(job: *const c_char, howmny: *const c_char, select: *const lapack_logical, n: *const lapack_int, a: *const lapack_complex_float, lda: *const lapack_int, b: *const lapack_complex_float, ldb: *const lapack_int, vl: *const lapack_complex_float, ldvl: *const lapack_int, vr: *const lapack_complex_float, ldvr: *const lapack_int, s: *mut c_float, dif: *mut c_float, mm: *const lapack_int, m: *mut lapack_int, work: *mut lapack_complex_float, lwork: *const lapack_int, iwork: *mut lapack_int, info: *mut lapack_int)