pub unsafe extern fn sgebrd_(m: *const lapack_int,
n: *const lapack_int,
a: *mut c_float,
lda: *const lapack_int,
d: *mut c_float,
e: *mut c_float,
tauq: *mut c_float,
taup: *mut c_float,
work: *mut c_float,
lwork: *const lapack_int,
info: *mut lapack_int)