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-rw-r--r--boost/ratio/ratio_fwd.hpp4
1 files changed, 4 insertions, 0 deletions
diff --git a/boost/ratio/ratio_fwd.hpp b/boost/ratio/ratio_fwd.hpp
index 0836d55..cd9199f 100644
--- a/boost/ratio/ratio_fwd.hpp
+++ b/boost/ratio/ratio_fwd.hpp
@@ -34,6 +34,10 @@ time2_demo contained this comment:
#include <boost/ratio/config.hpp>
+#if defined(__GNUC__) && (__GNUC__ >= 4)
+#pragma GCC system_header
+#endif
+
namespace boost
{