pub unsafe extern fn dsygv_(itype: *const lapack_int,
jobz: *const c_char,
uplo: *const c_char,
n: *const lapack_int,
a: *mut c_double,
lda: *const lapack_int,
b: *mut c_double,
ldb: *const lapack_int,
w: *mut c_double,
work: *mut c_double,
lwork: *const lapack_int,
info: *mut lapack_int)