chptrs(3) on Linux
The text ad8891eb261d, as Debian 4.0 (Etch), Debian 3.1 (Sarge) shipped it.
solve a system of linear equations A*X = B with a complex Hermitian matrix A stored in packed format using the factorization A = U*D*U**H or A = L*D*L**H computed by CHPTRF