From cbbe68579fee4a2e54a88acf5dd86090a0c2cd4c Mon Sep 17 00:00:00 2001
From: Vladimir Prus <ghost@cs.msu.su>
Date: Sat, 14 Oct 2006 08:17:47 +0000
Subject: [PATCH] Make gcc's PCH generator ignore the cpp sources, so that

   cpp-pch pch : pch.hpp pch.cpp ;

work both on gcc and msvc.


[SVN r35604]
---
 v2/tools/gcc.jam | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/v2/tools/gcc.jam b/v2/tools/gcc.jam
index b67e9001e..06dd7bcbd 100644
--- a/v2/tools/gcc.jam
+++ b/v2/tools/gcc.jam
@@ -164,9 +164,20 @@ class gcc-pch-generator : pch-generator
 {
     import project ;
     import property-set ;
+    import type ;
 
-    rule run-pch ( project name ? : property-set : header )
+    rule run-pch ( project name ? : property-set : sources + )
     {
+        # Find the header in sources. Ignore any CPP sources.
+        local header ;
+        for local s in $(sources)
+        {
+            if [ type.is-derived [ $(s).type ] H ] 
+            {
+                header = $(s) ;
+            }            
+        }
+                
         # error handling
         # base name of header file should be the same as the base name 
         # of precompiled header.