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diff --git a/boost/coroutine/posix/segmented_stack_allocator.hpp b/boost/coroutine/posix/segmented_stack_allocator.hpp
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+++ b/boost/coroutine/posix/segmented_stack_allocator.hpp
@@ -0,0 +1,69 @@
+
+//          Copyright Oliver Kowalke 2009.
+// Distributed under the Boost Software License, Version 1.0.
+//    (See accompanying file LICENSE_1_0.txt or copy at
+//          http://www.boost.org/LICENSE_1_0.txt)
+
+#ifndef BOOST_COROUTINES_SEGMENTED_STACK_ALLOCATOR_H
+#define BOOST_COROUTINES_SEGMENTED_STACK_ALLOCATOR_H
+
+#include <cstddef>
+#include <new>
+
+#include <boost/config.hpp>
+
+#include <boost/coroutine/detail/config.hpp>
+#include <boost/coroutine/stack_context.hpp>
+#include <boost/coroutine/stack_traits.hpp>
+
+#ifdef BOOST_HAS_ABI_HEADERS
+#  include BOOST_ABI_PREFIX
+#endif
+
+// forward declaration for splitstack-functions defined in libgcc
+extern "C" {
+void *__splitstack_makecontext( std::size_t,
+                                void * [BOOST_COROUTINES_SEGMENTS],
+                                std::size_t *);
+
+void __splitstack_releasecontext( void * [BOOST_COROUTINES_SEGMENTS]);
+
+void __splitstack_resetcontext( void * [BOOST_COROUTINES_SEGMENTS]);
+
+void __splitstack_block_signals_context( void * [BOOST_COROUTINES_SEGMENTS],
+                                         int * new_value, int * old_value);
+}
+
+namespace boost {
+namespace coroutines {
+
+template< typename traitsT >
+struct basic_segmented_stack_allocator
+{
+    typedef traitsT traits_type;
+
+    void allocate( stack_context & ctx, std::size_t size = traits_type::minimum_size() )
+    {
+        void * limit = __splitstack_makecontext( size, ctx.segments_ctx, & ctx.size);
+        if ( ! limit) throw std::bad_alloc();
+
+        // ctx.size is already filled by __splitstack_makecontext
+        ctx.sp = static_cast< char * >( limit) + ctx.size;
+
+        int off = 0;
+        __splitstack_block_signals_context( ctx.segments_ctx, & off, 0);
+    }
+
+    void deallocate( stack_context & ctx)
+    { __splitstack_releasecontext( ctx.segments_ctx); }
+};
+
+typedef basic_segmented_stack_allocator< stack_traits > segmented_stack_allocator;
+
+}}
+
+#ifdef BOOST_HAS_ABI_HEADERS
+#  include BOOST_ABI_SUFFIX
+#endif
+
+#endif // BOOST_COROUTINES_SEGMENTED_STACK_ALLOCATOR_H