pub unsafe extern fn dtgexc_(__wantq: *mut __CLPK_logical, __wantz: *mut __CLPK_logical, __n: *mut __CLPK_integer, __a: *mut __CLPK_doublereal, __lda: *mut __CLPK_integer, __b: *mut __CLPK_doublereal, __ldb: *mut __CLPK_integer, __q: *mut __CLPK_doublereal, __ldq: *mut __CLPK_integer, __z__: *mut __CLPK_doublereal, __ldz: *mut __CLPK_integer, __ifst: *mut __CLPK_integer, __ilst: *mut __CLPK_integer, __work: *mut __CLPK_doublereal, __lwork: *mut __CLPK_integer, __info: *mut __CLPK_integer) -> c_int