https://github.com/recastnavigation/recastnavigation/pull/437

diff --git a/CMakeLists.txt b/CMakeLists.txt
index d23859d..54a38d8 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -11,6 +11,8 @@ option(RECASTNAVIGATION_TESTS "Build tests" ON)
 option(RECASTNAVIGATION_EXAMPLES "Build examples" ON)
 option(RECASTNAVIGATION_STATIC "Build static libraries" ON)
 
+include(GNUInstallDirs)
+
 add_subdirectory(DebugUtils)
 add_subdirectory(Detour)
 add_subdirectory(DetourCrowd)
diff --git a/DebugUtils/CMakeLists.txt b/DebugUtils/CMakeLists.txt
index 8b6a3fc..86cfe76 100644
--- a/DebugUtils/CMakeLists.txt
+++ b/DebugUtils/CMakeLists.txt
@@ -26,10 +26,10 @@ set_target_properties(DebugUtils PROPERTIES
         )
 
 install(TARGETS DebugUtils
-        ARCHIVE DESTINATION lib
-        LIBRARY DESTINATION lib
+        ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
+        LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
         COMPONENT library
         )
 
 file(GLOB INCLUDES Include/*.h)
-install(FILES ${INCLUDES} DESTINATION include)
+install(FILES ${INCLUDES} DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/recastnavigation)
diff --git a/Detour/CMakeLists.txt b/Detour/CMakeLists.txt
index de88111..b4c457a 100644
--- a/Detour/CMakeLists.txt
+++ b/Detour/CMakeLists.txt
@@ -20,10 +20,10 @@ set_target_properties(Detour PROPERTIES
         )
 
 install(TARGETS Detour
-        ARCHIVE DESTINATION lib
-        LIBRARY DESTINATION lib
+        ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
+        LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
         COMPONENT library
         )
 
 file(GLOB INCLUDES Include/*.h)
-install(FILES ${INCLUDES} DESTINATION include)
+install(FILES ${INCLUDES} DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/recastnavigation)
diff --git a/DetourCrowd/CMakeLists.txt b/DetourCrowd/CMakeLists.txt
index 73cdf7c..7d1ace3 100644
--- a/DetourCrowd/CMakeLists.txt
+++ b/DetourCrowd/CMakeLists.txt
@@ -24,10 +24,10 @@ set_target_properties(DetourCrowd PROPERTIES
         )
 
 install(TARGETS DetourCrowd
-        ARCHIVE DESTINATION lib
-        LIBRARY DESTINATION lib
+        ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
+        LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
         COMPONENT library
         )
 
 file(GLOB INCLUDES Include/*.h)
-install(FILES ${INCLUDES} DESTINATION include)
+install(FILES ${INCLUDES} DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/recastnavigation)
diff --git a/DetourTileCache/CMakeLists.txt b/DetourTileCache/CMakeLists.txt
index 121b8ed..141a680 100644
--- a/DetourTileCache/CMakeLists.txt
+++ b/DetourTileCache/CMakeLists.txt
@@ -25,10 +25,10 @@ set_target_properties(DetourTileCache PROPERTIES
 
 
 install(TARGETS DetourTileCache
-        ARCHIVE DESTINATION lib
-        LIBRARY DESTINATION lib
+        ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
+        LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
         COMPONENT library
         )
 
 file(GLOB INCLUDES Include/*.h)
-install(FILES ${INCLUDES} DESTINATION include)
+install(FILES ${INCLUDES} DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/recastnavigation)
diff --git a/Recast/CMakeLists.txt b/Recast/CMakeLists.txt
index 5e84376..3b04742 100644
--- a/Recast/CMakeLists.txt
+++ b/Recast/CMakeLists.txt
@@ -20,10 +20,10 @@ set_target_properties(Recast PROPERTIES
         )
 
 install(TARGETS Recast
-        ARCHIVE DESTINATION lib
-        LIBRARY DESTINATION lib
+        ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
+        LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
         COMPONENT library
         )
 
 file(GLOB INCLUDES Include/*.h)
-install(FILES ${INCLUDES} DESTINATION include)
+install(FILES ${INCLUDES} DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/recastnavigation)
diff --git a/Tests/CMakeLists.txt b/Tests/CMakeLists.txt
index 7c17469..a98ccbf 100644
--- a/Tests/CMakeLists.txt
+++ b/Tests/CMakeLists.txt
@@ -8,5 +8,3 @@ add_executable(Tests ${TESTS_SOURCES})
 add_dependencies(Tests Recast Detour)
 target_link_libraries(Tests Recast Detour)
 add_test(Tests Tests)
-
-install(TARGETS Tests RUNTIME DESTINATION bin)