<html><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:12pt"><div>i am trying to build libXext-1.3.1 but i get a error message <br></div><div><br></div><div>checking for X.Org SGML entities >= 1.8... ./configure: line 18029: syntax error near unexpected token `xorg-sgml-doctools'<br>./configure: line 18029: `PKG_CHECK_EXISTS(xorg-sgml-doctools m4_ifval([1.8],[>= 1.8]),'<br></div><div><br></div>what shall i do, please help</div></body></html>