libb-hooks-op-check-perl 0.18-1build1 (armel binary) in ubuntu oneiric

 B::Hooks::OP::Check provides an interface for XS modules to hook into the
 callbacks of PL_check, which is part of perl's core. It allows a C function to
 be invoked as the last stage of optree compilation, depending on the given op
 code number (op_type).