X-Git-Url: https://git.lyx.org/gitweb/?a=blobdiff_plain;f=src%2Ffrontends%2Fpch.h;h=9864bc017614d865c94b1951ba626312385805a6;hb=b1a87cc7781bd11d9481b69e96eb67b2d637e167;hp=9a902861fb6c70ab5f5bc75492646522bfa4489b;hpb=b0fbc29aa34345e1ffa54f6fd9193d7c42e577f2;p=lyx.git

diff --git a/src/frontends/pch.h b/src/frontends/pch.h
index 9a902861fb..9864bc0176 100644
--- a/src/frontends/pch.h
+++ b/src/frontends/pch.h
@@ -4,14 +4,15 @@
 #include <boost/scoped_ptr.hpp>
 #include <boost/shared_ptr.hpp>
 #include <boost/signal.hpp>
-#include <boost/signals/signal0.hpp>
-#include <boost/signals/signal1.hpp>
-#include <boost/signals/signal2.hpp>
 #include <boost/signals/trackable.hpp>
 #include <boost/utility.hpp>
 
-#include <sys/time.h>
-#include <unistd.h>
+#ifdef HAVE_SYS_TIME_H
+# include <sys/time.h>
+#endif
+#ifdef HAVE_UNISTD_H
+# include <unistd.h>
+#endif
 
 #include <limits>
 #include <map>