chegvd(3) on Linux
The text dd17399d09b0, as Debian 3.0 (Woody) shipped it.
compute all the eigenvalues, and optionally, the eigenvectors of a complex generalized Hermitian-definite eigenproblem, of the form A*x=(lambda)*B*x, A*Bx=(lambda)*x, or B*A*x=(lambda)*x