From 7fbbb6e546c56e44e8137e15a406dc33bdbae54f Mon Sep 17 00:00:00 2001
From: Vladimir Prus <ghost@cs.msu.su>
Date: Tue, 30 Jun 2009 15:41:42 +0000
Subject: [PATCH] Add 'elf' value of target-os.

[SVN r54536]
---
 src/tools/builtin.jam | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/tools/builtin.jam b/src/tools/builtin.jam
index f0109e6cb..02f2c3f9c 100644
--- a/src/tools/builtin.jam
+++ b/src/tools/builtin.jam
@@ -39,7 +39,13 @@ import generate ;
 
 
 .os-names = aix bsd cygwin darwin freebsd hpux iphone linux netbsd
-    openbsd osf qnx qnxnto sgi solaris unix unixware windows ;
+    openbsd osf qnx qnxnto sgi solaris unix unixware windows 
+    elf # Not actually an OS -- used for targeting bare metal where
+        # object format is ELF.  This catches both -elf and -eabi gcc
+        # targets and well as other compilers targeting ELF. It is not
+        # clear how often do we need to key of ELF specifically as opposed
+        # to other bare metal targets, but let's stick with gcc naming.
+    ;
 
 # Feature used to determine which OS we're on. New <target-os> and <host-os>
 # features should be used instead.