Warn on undefined #if, and enjoy that feature

[simgrid.git] / include / xbt / signal.hpp

diff --git a/include/xbt/signal.hpp b/include/xbt/signal.hpp
index 714ae0d..26bd2df 100644 (file)
--- a/include/xbt/signal.hpp
+++ b/include/xbt/signal.hpp
@@ -6,6 +6,7 @@
 #ifndef SIMGRID_XBT_SIGNAL_HPP
 #define SIMGRID_XBT_SIGNAL_HPP
 
+#include "simgrid_config.h"
 #if SIMGRID_HAVE_LIBSIG
 #include <sigc++/sigc++.h>
 #else