#include <boost/scoped_ptr.hpp>
// getpid(), getppid()
-#include <sys/types.h>
-#include <unistd.h>
+#ifdef HAVE_SYS_TYPES_H
+# include <sys/types.h>
+#endif
+#ifdef HAVE_UNISTD_H
+# include <unistd.h>
+#endif
// select()
-#include <sys/select.h>
+#ifdef HAVE_SYS_SELECT_H
+# include <sys/select.h>
+#endif
// socket(), connect()
-#include <sys/socket.h>
+#ifdef HAVE_SYS_SOCKET_H
+# include <sys/socket.h>
+#endif
#include <sys/un.h>
// fcntl()