Mon Oct 12 18:44:56 UTC 2009 William R. Otte <wotte@dre.vanderbilt.edu>

2 files changed, 33 insertions, 1 deletions

diff --git a/CIAO/ChangeLog b/CIAO/ChangeLog
index 16e1a8c908a..2b76c43528a 100644
--- a/CIAO/ChangeLog
+++ b/CIAO/ChangeLog
@@ -1,3 +1,9 @@
+Mon Oct 12 18:44:56 UTC 2009  William R. Otte  <wotte@dre.vanderbilt.edu>
+
+        * NEWS:
+
+          Further describe -Glem changes. 
+        
 Fri Oct  9 09:24:08 UTC 2009  Marcel Smit  <msmit@remedy.nl>
 
         * connectors/ami4ccm/examples/Hello/Receiver/Hello_Receiver_exec.cpp:
diff --git a/CIAO/NEWS b/CIAO/NEWS
index 89eb98ef2c8..a501552ecf4 100644
--- a/CIAO/NEWS
+++ b/CIAO/NEWS
@@ -71,7 +71,33 @@ USER VISIBLE CHANGES BETWEEN CIAO-0.7.3 and CIAO-0.7.4
 . Extended AMI4CCM prototype
 
 . Update all examples and tests for the changes in the -Glem
-  TAO_IDL option
+  TAO_IDL option.  The behavior of this option has changed
+  dramatically, and will require that most user applications be
+  ported.  Previously, -Glem would cause the IDL compiler to generate
+  a E.idl file containing local executor mapping for all interfaces
+  provided as ports by any components in the main translation unit.
+  Therefore, files with interfaces, but no components defined will
+  have empty E.idl files generated.  Similarly, a file with no
+  interfaces defined, but with components defined would generate LEM
+  interfaces for interfaces provided by that component but not local
+  to the file in question.  While this behavior simplified a
+  rudimentary use case where interfaces would be provided by only one
+  component, more complicated use cases were much more difficult to
+  achieve.  
+
+  The new behvior causes the IDL compiler to generate LEM IDL for all
+  interfaces within a given translation unit, regardless of whether or
+  not they are provided as ports by a component in the same
+  translation unit.  Futhermore, if a component provides an interface
+  that is not defined with the translation unit of that compoment, it
+  is required that the user provide a #include directive to the
+  appropriate E.idl file which contains the required LEM interface for
+  the interfaces provided as facets.  
+
+  This new behavior is similar to the former behavior of -Glfa, and as
+  such the behavior of -Glfa has been changed to attempt to be
+  reflective of the old behavior of -Glem, and may be used as a
+  stopgap backwards compatibility measure.  
 
 . In idl3_to_idl2 tool, replaced manual designation of IDL2-only
   files and resulting generated include of undecorated filename