Use GNUInstallDirs.

CMakeLists.txt

@@ -130,8 +130,9 @@ ${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}Config.cmake @ONLY IMMEDIATE )
 #######################################################
 ## Install headers / targets
 
+include(GNUInstallDirs)
 # This relative path allows installed files to be relocatable.
-set( CMAKECONFIG_INSTALL_DIR lib/cmake/${PROJECT_NAME} )
+set( CMAKECONFIG_INSTALL_DIR ${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME} )
 file( RELATIVE_PATH REL_INCLUDE_DIR
     "${CMAKE_INSTALL_PREFIX}/${CMAKECONFIG_INSTALL_DIR}"
     "${CMAKE_INSTALL_PREFIX}/include"
@@ -140,10 +141,10 @@ file( RELATIVE_PATH REL_INCLUDE_DIR
 install(
     TARGETS ${component_list}
     EXPORT ${PROJECT_NAME}Targets
-    LIBRARY DESTINATION lib
-    ARCHIVE DESTINATION lib
-    RUNTIME DESTINATION bin
-    INCLUDES DESTINATION include
+    LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
+    ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
+    RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
+    INCLUDES DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
 )
 
 install(