pub unsafe extern fn LAPACKE_ctgexc(matrix_layout: c_int,
wantq: lapack_logical,
wantz: lapack_logical,
n: lapack_int,
a: *mut lapack_complex_float,
lda: lapack_int,
b: *mut lapack_complex_float,
ldb: lapack_int,
q: *mut lapack_complex_float,
ldq: lapack_int,
z: *mut lapack_complex_float,
ldz: lapack_int,
ifst: lapack_int,
ilst: lapack_int)
-> lapack_int