From 1c17c6acfdb8fd396d01a52182d097615e3276e0 Mon Sep 17 00:00:00 2001
From: Vladimir Prus <ghost@cs.msu.su>
Date: Tue, 9 Nov 2004 08:02:43 +0000
Subject: [PATCH] Add comment.

[SVN r26156]
---
 v2/tools/builtin.jam | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/v2/tools/builtin.jam b/v2/tools/builtin.jam
index 2f2db79eb..41af9dea4 100644
--- a/v2/tools/builtin.jam
+++ b/v2/tools/builtin.jam
@@ -632,6 +632,11 @@ class compile-action : action
     }    
 }
 
+# Declare a special compiler generator.
+# The only thing it does is changing the type used to represent
+# 'action' in the constructed dependency graph to 'compile-action'.
+# That class in turn adds additional include paths to handle a case
+# when a source file includes headers which are generated themselfs.
 class C-compiling-generator : generator
 {
     rule __init__ ( id : source-types + : target-types + :