Index: tools/build/v2/tools/builtin.jam
===================================================================
RCS file: /cvsroot/boost/boost/tools/build/v2/tools/builtin.jam,v
retrieving revision 1.191
diff -u -3 -p -r1.191 builtin.jam
--- tools/build/v2/tools/builtin.jam	15 Aug 2006 18:46:13 -0000	1.191
+++ tools/build/v2/tools/builtin.jam	16 Aug 2006 05:44:45 -0000
@@ -53,6 +53,7 @@ local rule default-host-os ( )
             case IRIX : host-os = sgi ;
             case MACOSX : host-os = darwin ;
             case KFREEBSD : host-os = freebsd ;
+            case LINUX : host-os = linux ;
             case * : host-os = unix ;
         }
     }
@@ -68,13 +69,13 @@ local rule default-host-os ( )
 feature host-os
     :   amiga aix bsd cygwin darwin dos emx freebsd hpux
         linux netbsd openbsd osf qnx qnxnto sgi solaris sun sunos
-        svr4 sysv ultrix unixware vms windows
+        svr4 sysv ultrix unixware vms windows unix
     :   optional ;
         feature.set-default host-os : [ default-host-os ] ;
 feature target-os
     :   amiga aix bsd cygwin darwin dos emx freebsd hpux
         linux netbsd openbsd osf qnx qnxnto sgi solaris sun sunos
-        svr4 sysv ultrix unixware vms windows
+        svr4 sysv ultrix unixware vms windows unix
     :   propagated link-incompatible ;
         feature.set-default target-os : [ default-host-os ] ;