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The reference list omits routines called by unused library modules. Thus it contains the same information as for the call-tree format, namely the hierarchy of subprogram calls, but printed in a different way. This prints out a breadth-first traversal of the call tree whereas -calltree prints out a depth-first traversal. Only one format is printed. If both -calltree and -reference flags are given, the former will take precedence.
See also: -calltree , -crossref , -library , -sort , -symtab , -vcg .
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