dsptrs(3) on Linux
The text 1d3628afd62c, as Debian 4.0 (Etch), Debian 3.1 (Sarge) shipped it.
solve a system of linear equations A*X = B with a real symmetric matrix A stored in packed format using the factorization A = U*D*U**T or A = L*D*L**T computed by DSPTRF