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