no qsort_r() on EL5 -  needs alternative implementation
no qsort_r() on EL5 -  needs alternative implementation

ellson/graphviz,ellson/graphviz,ellson/graphviz,ellson/graphviz,ellson/graphviz,ellson/graphviz,ellson/graphviz,ellson/graphviz,ellson/graphviz,ellson/graphviz,ellson/graphviz