pub unsafe extern fn ztgexc_(wantq: *const lapack_logical, wantz: *const lapack_logical, n: *const lapack_int, a: *mut lapack_complex_double, lda: *const lapack_int, b: *mut lapack_complex_double, ldb: *const lapack_int, q: *mut lapack_complex_double, ldq: *const lapack_int, z: *mut lapack_complex_double, ldz: *const lapack_int, ifst: *const lapack_int, ilst: *mut lapack_int, info: *mut lapack_int)