Index: build/generator/gen_base.py
===================================================================
--- build/generator/gen_base.py	(revision 17486)
+++ build/generator/gen_base.py	(working copy)
@@ -553,7 +553,8 @@
     self.filename = build_path_join(self.path, lib_filename)
 
     ifile = SWIGSource(ipath)
-    cfile = SWIGObject(build_path_join(self.path, cname), self.lang)
+    cfile = SWIGObject(build_path_join('$(top_srcdir)', self.path, cname),
+      self.lang)
     ofile = SWIGObject(build_path_join(self.path, oname), self.lang)
 
     # the .c file depends upon the .i file
Index: build/generator/gen_make.py
===================================================================
--- build/generator/gen_make.py	(revision 17487)
+++ build/generator/gen_make.py	(working copy)
@@ -195,18 +195,10 @@
       source_dir = build_path_dirname(source)
       opts = self.swig.opts[objname.lang]
       if not self.release_mode:
-        self.ofile.write('%s: %s\n' % (objname, deps) +
+        self.ofile.write('$(top_srcdir)/%s: %s\n' % (objname, deps) +
           '\t$(SWIG) $(SWIG_INCLUDES) %s ' % opts +
           '-o $@ $(top_srcdir)/%s\n' % source
         )
-      self.ofile.write(
-        'autogen-swig-%s: copy-swig-%s\n' % (short[objname.lang], objname) +
-        'copy-swig-%s: %s\n' % (objname, objname) +
-        '\t@if test $(abs_srcdir) != $(abs_builddir) -a ' +
-        '-r $(abs_srcdir)/%s -a ' % objname + 
-        '! -r $(abs_builddir)/%s; then ' % objname +
-        'cp -pf $(abs_srcdir)/%s $(abs_builddir)/%s; fi\n' % (objname, objname)
-      )
 
     self.ofile.write('\n')