About libelf - 6 years ago Groklaw closed this "issue": http://www.groklaw.net/articlebasic.php?story=20040722135616439 The varable names are the same in both headers, because they correspond to Tool Interface Standard (TIS) 1.1 (Oct 1993). http://webster.cs.ucr.edu/Page_TechDocs/pfmt11.pdf