add rpath for Solaris
diff --git a/auto/options b/auto/options
index 1006e85..4fe4ddd 100644
--- a/auto/options
+++ b/auto/options
@@ -23,6 +23,8 @@
 NGX_LD_OPT=
 CPU=NO
 
+NGX_RPATH=NO
+
 NGX_TEST_BUILD_DEVPOLL=NO
 NGX_TEST_BUILD_EVENTPORT=NO
 NGX_TEST_BUILD_EPOLL=NO