Index: files/patch-demo_CMakeLists.txt
===================================================================
--- files/patch-demo_CMakeLists.txt	(revision 364254)
+++ files/patch-demo_CMakeLists.txt	(working copy)
@@ -1,5 +1,23 @@
---- demo/CMakeLists.txt.orig	2013-11-18 14:51:59.000000000 +0100
-+++ demo/CMakeLists.txt	2013-11-18 14:52:21.000000000 +0100
+--- demo/CMakeLists.txt.orig	2013-10-30 14:11:59.000000000 +0100
++++ demo/CMakeLists.txt	2014-10-13 10:52:19.000000000 +0200
+@@ -61,7 +61,7 @@
+   # =======================================================================
+   foreach(demo ${demos_NAMES})
+     add_executable(${demo} ${demo}.c)
+-    target_link_libraries(${demo} ${_LIBHPDF_LIB})
++    target_link_libraries(${demo} ${_LIBHPDF_LIB} m)
+     if(DEMO_C_FLAGS)
+       set_target_properties(${demo} PROPERTIES COMPILE_FLAGS ${DEMO_C_FLAGS})
+     endif(DEMO_C_FLAGS)
+@@ -70,7 +70,7 @@
+   # some demos need grid_sheet.c compiled in
+   foreach(demo ${demos_with_grid_NAMES})
+     add_executable(${demo} ${demo}.c grid_sheet.c)
+-    target_link_libraries(${demo} ${_LIBHPDF_LIB})
++    target_link_libraries(${demo} ${_LIBHPDF_LIB} m)
+     if(DEMO_C_FLAGS)
+       set_target_properties(${demo} PROPERTIES COMPILE_FLAGS ${DEMO_C_FLAGS})
+     endif(DEMO_C_FLAGS)
 @@ -86,15 +86,15 @@
    # =======================================================================
    install(