pub unsafe extern fn dsbgvx_(jobz: *const c_char,
range: *const c_char,
uplo: *const c_char,
n: *const lapack_int,
ka: *const lapack_int,
kb: *const lapack_int,
ab: *mut c_double,
ldab: *const lapack_int,
bb: *mut c_double,
ldbb: *const lapack_int,
q: *mut c_double,
ldq: *const lapack_int,
vl: *const c_double,
vu: *const c_double,
il: *const lapack_int,
iu: *const lapack_int,
abstol: *const c_double,
m: *mut lapack_int,
w: *mut c_double,
z: *mut c_double,
ldz: *const lapack_int,
work: *mut c_double,
iwork: *mut lapack_int,
ifail: *mut lapack_int,
info: *mut lapack_int)