* include/bits/stl_threads.h (_Atomic_swap): Only enable path

[pf3gnuchains/gcc-fork.git] / libstdc++-v3 / include / bits / stl_threads.h

diff --git a/libstdc++-v3/include/bits/stl_threads.h b/libstdc++-v3/include/bits/stl_threads.h
index 20c3deb..6df2ac7 100644 (file)
--- a/libstdc++-v3/include/bits/stl_threads.h
+++ b/libstdc++-v3/include/bits/stl_threads.h
@@ -196,7 +196,7 @@ struct _Refcount_Base
 // possibly concurrent updates use _Atomic_swap.
 // In some cases the operation is emulated with a lock.
 // GCC extension begin
 // possibly concurrent updates use _Atomic_swap.
 // In some cases the operation is emulated with a lock.
 // GCC extension begin

-#ifdef __STL_GTHREADS
+#if defined (__STL_GTHREADS) && defined (__GTHREAD_MUTEX_INIT)

 // We don't provide an _Atomic_swap in this configuration.  This only
 // affects the use of ext/rope with threads.  Someone could add this
 // later, if required.  You can start by cloning the __STL_PTHREADS
 // We don't provide an _Atomic_swap in this configuration.  This only
 // affects the use of ext/rope with threads.  Someone could add this
 // later, if required.  You can start by cloning the __STL_PTHREADS