diff -Nur FANN-2.2.0-Source/CMakeLists.txt FANN-2.2.0-Source-new/CMakeLists.txt
--- FANN-2.2.0-Source/CMakeLists.txt	2012-01-24 06:31:40.000000000 +0100
+++ FANN-2.2.0-Source-new/CMakeLists.txt	2015-11-03 02:32:40.583341093 +0100
@@ -16,7 +16,7 @@
 
 configure_file( ${CMAKE_SOURCE_DIR}/cmake/fann.pc.cmake ${CMAKE_CURRENT_BINARY_DIR}/fann.pc @ONLY )
 
-SET(PKGCONFIG_INSTALL_DIR /lib/pkgconfig)
+SET(PKGCONFIG_INSTALL_DIR /lib${LIB_SUFFIX}/pkgconfig)
 
 ########### install files ###############
 
diff -Nur FANN-2.2.0-Source/src/CMakeLists.txt FANN-2.2.0-Source-new/src/CMakeLists.txt
--- FANN-2.2.0-Source/src/CMakeLists.txt	2012-01-24 06:31:40.000000000 +0100
+++ FANN-2.2.0-Source-new/src/CMakeLists.txt	2015-11-03 02:36:14.472334773 +0100
@@ -11,6 +11,7 @@
 ADD_LIBRARY(floatfann SHARED ${floatfann_LIB_SRCS})
 
 SET_TARGET_PROPERTIES(floatfann PROPERTIES VERSION ${VERSION} SOVERSION 2 )
+TARGET_LINK_LIBRARIES(floatfann m)
 INSTALL(TARGETS floatfann DESTINATION ${LIB_INSTALL_DIR} )
 
 
@@ -23,6 +24,7 @@
 ADD_LIBRARY(doublefann SHARED ${doublefann_LIB_SRCS})
 
 SET_TARGET_PROPERTIES(doublefann PROPERTIES VERSION ${VERSION} SOVERSION 2 )
+TARGET_LINK_LIBRARIES(doublefann m)
 INSTALL(TARGETS doublefann DESTINATION ${LIB_INSTALL_DIR} )
 
 
@@ -35,6 +37,7 @@
 ADD_LIBRARY(fixedfann SHARED ${fixedfann_LIB_SRCS})
 
 SET_TARGET_PROPERTIES(fixedfann PROPERTIES VERSION ${VERSION} SOVERSION 2 )
+TARGET_LINK_LIBRARIES(fixedfann m)
 INSTALL(TARGETS fixedfann DESTINATION ${LIB_INSTALL_DIR} )
 
 
@@ -47,5 +50,6 @@
 ADD_LIBRARY(fann SHARED ${fann_LIB_SRCS})
 
 SET_TARGET_PROPERTIES(fann PROPERTIES VERSION ${VERSION} SOVERSION 2 )
+TARGET_LINK_LIBRARIES(fann m)
 INSTALL(TARGETS fann DESTINATION ${LIB_INSTALL_DIR} )