Index: libs/coroutine/build/Jamfile.v2
===================================================================
--- libs/coroutine/build/Jamfile.v2.orig	2014-07-09 19:45:23.000000000 +0200
+++ libs/coroutine/build/Jamfile.v2	2015-02-23 14:30:47.673766402 +0100
@@ -24,6 +24,7 @@ project boost/coroutine
       <toolset>gcc-4.9,<segmented-stacks>on:<linkflags>"-static-libgcc"
       <toolset>clang-3.4,<segmented-stacks>on:<cxxflags>-fsplit-stack
       <toolset>clang-3.4,<segmented-stacks>on:<linkflags>"-static-libgcc"
+      <toolset>gcc:<cxxflags>-std=c++11
       <link>shared:<define>BOOST_COROUTINES_DYN_LINK=1
       <define>BOOST_COROUTINES_SOURCE
     : usage-requirements