There is an extension point (org.
eclipse.
ant.core.extraClasspathEntries) to add extra JARs to the 
  
Ant runtime classpath, but these JARs are added to 
  the classpath after the 
Ant Home JARs.
I 
  would encourage you to attach your fix to the 
Ant 
  bug for inclusion in the next version of 
Ant.
Darins
http://runnerwhocodes.blogspot.com ----- 
  Original Message -----
 From: Kirk Wolf
 To: 
platform-ant-dev@eclipse.org Sent: Friday, May 16, 2008 7:20 
  AM
 Subject: [platform-
ant-dev] Fixing 
Ant bug in a plugin?
 There's a nasty bug 
  in 
Ant 1.7 that prevents the <ftp> 
  <modified> tag from working properly.
 See: 
https://issues.apache.org/bugzilla/show_bug.cgi?id=45010 The 
  fix to this is very simple (changing one line in an 
Ant class).
 I'd like to package a patched 
  
Ant class into a jar and include that jar into a 
  plugin that my users can use with 
Eclipse to 
  simplify fixing this problem.
 - Can I do this with an extension 
  point that adds the jar to the beginning of the 
Ant 
  classpath?
 - Can I make the extension conditional on having the 
Ant 1.7 plugin?
 I'm a newbie to writing 
  plugins, can anyone help me with the plugin.xml to do 
  this?
 Thanks,
 Kirk Wolf
 Dovetailed 
  Technologies