--- hwloc-1.8.1/config/hwloc.m4.orig	2014-01-30 17:46:58.000000000 +0400
+++ hwloc-1.8.1/config/hwloc.m4	2014-02-27 13:46:28.587238873 +0400
@@ -948,7 +948,7 @@
                hwloc_gl_happy=no])
 
         AC_CHECK_HEADERS([NVCtrl/NVCtrl.h], [
-          AC_CHECK_LIB([XNVCtrl], [XNVCTRLQueryTargetAttribute], [:], [hwloc_gl_happy=no], [-lXext])
+          AC_CHECK_LIB([XNVCtrl], [XNVCTRLQueryTargetAttribute], [:], [hwloc_gl_happy=no], [-lXext -lX11])
         ], [hwloc_gl_happy=no])
 
         if test "x$hwloc_gl_happy" = "xyes"; then