#
# Patch from upstream to ensure nn library is linked against the maths library.
#
Index: plplot-5.9.9/lib/nn/CMakeLists.txt
===================================================================
--- plplot-5.9.9.orig/lib/nn/CMakeLists.txt	2012-02-28 11:40:08.000000000 +0000
+++ plplot-5.9.9/lib/nn/CMakeLists.txt	2012-02-28 11:45:48.000000000 +0000
@@ -38,6 +38,7 @@
   endif(BUILD_SHARED_LIBS)
 
   add_library(csironn ${csironn_LIB_SRCS})
+
   set_target_properties(
     csironn
     PROPERTIES
@@ -46,7 +47,22 @@
     COMPILE_FLAGS "-I${QHULL_INCLUDE_DIRS}"
     INSTALL_NAME_DIR "${LIB_DIR}"
     )
-  target_link_libraries(csironn ${QHULL_LIBRARIES})
+
+  set(
+    csironn_LINK_LIBRARIES
+    ${csironn_LINK_LIBRARIES}
+    ${QHULL_LIBRARIES}
+  )
+
+  if(MATH_LIB)
+    set(
+      csironn_LINK_LIBRARIES
+      ${csironn_LINK_LIBRARIES}
+      ${MATH_LIB}
+      )
+  endif(MATH_LIB)
+
+  target_link_libraries(csironn ${csironn_LINK_LIBRARIES})
   install(TARGETS csironn
     EXPORT export_plplot
     ARCHIVE DESTINATION ${LIB_DIR}