From ee6fbe513ec8e3d828baf4cd18663f868e7f020d Mon Sep 17 00:00:00 2001
From: Vladimir Prus <ghost@cs.msu.su>
Date: Thu, 28 Apr 2005 14:14:59 +0000
Subject: [PATCH] Allow "bjam hello.o" to work.

[SVN r28514]
---
 v2/build-system.jam         | 14 +++++++++++---
 v2/build/virtual-target.jam |  8 ++++++++
 2 files changed, 19 insertions(+), 3 deletions(-)

diff --git a/v2/build-system.jam b/v2/build-system.jam
index 9d40b424a..0fe4c0121 100755
--- a/v2/build-system.jam
+++ b/v2/build-system.jam
@@ -138,6 +138,8 @@ if "--clean" in [ modules.peek : ARGV ]
     clean = true ;
 }
 
+local bjam-targets ;
+
 for local id in $(target-ids)
 {
     if $(id) = clean
@@ -146,10 +148,12 @@ for local id in $(target-ids)
     }
     else
     {
-        local t = [ $(current-project).find $(id) ] ;
+        local t = [ $(current-project).find $(id) : no-error ] ;
         if ! $(t)
         {
-            error target $(id) does not exist ;
+            ECHO "notice: could not find main target " $(id) ;
+            ECHO "notice: assuming it's a name of file to create " ;
+            bjam-targets += $(id) ;
         }
         else
         {
@@ -194,7 +198,11 @@ for t in $(virtual-targets)
 NOTFILE all ;
 DEPENDS all : $(actual-targets) ;
 
-if $(clean)
+if $(bjam-targets)
+{
+    UPDATE $(bjam-targets) ;
+}
+else if $(clean)
 {
     UPDATE clean ;
 }
diff --git a/v2/build/virtual-target.jam b/v2/build/virtual-target.jam
index 5c57f4405..f2d37bd2c 100644
--- a/v2/build/virtual-target.jam
+++ b/v2/build/virtual-target.jam
@@ -518,6 +518,14 @@ class file-target : abstract-file-target
 
                 common.MkDir $(d) ;
             }            
+            
+            # For real file target, we create gristless target that
+            # depends on the real target. This allows to run
+            #
+            #    bjam hello.o
+            #
+            # without trying to guess the name of the real target.            
+            DEPENDS $(target:G=) : $(target) ;
         }
         else
         {