CMakeLists: Use GNUInstallDirs instead of open-coding the FHS standard

Suggested by Cloudef on #13.

Author: mupuf

CMakeLists.txt

@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 2.6)
+CMAKE_MINIMUM_REQUIRED(VERSION 2.8.5)
 
 IF(NOT CMAKE_BUILD_TYPE)
   SET(CMAKE_BUILD_TYPE "Release" CACHE
@@ -13,6 +13,7 @@ INCLUDE(CheckLibraryExists)
 INCLUDE(CheckFunctionExists)
 INCLUDE(FindPkgConfig)
 INCLUDE(FeatureSummary)
+INCLUDE(GNUInstallDirs)
 
 INCLUDE_DIRECTORIES("include/" ${CMAKE_SOURCE_DIR}/src)
 LINK_DIRECTORIES(${CMAKE_BINARY_DIR})
@@ -26,18 +27,14 @@ IF(NOT WSM_BUILD_BACKENDS)
 	SET(WSM_BE_EXAMPLE OFF)
 ENDIF(NOT WSM_BUILD_BACKENDS)
 
-IF(NOT LIB_INSTALL_DIR)
-	SET(LIB_INSTALL_DIR ${CMAKE_INSTALL_PREFIX}/lib${LIB_SUFFIX})
-ENDIF(NOT LIB_INSTALL_DIR)
-
 #Tell libWSM where to find the backends
 IF(NOT WSM_BACKEND_DIRECTORY)
-	SET(WSM_BACKEND_DIRECTORY ${LIB_INSTALL_DIR}/wsm)
+	SET(WSM_BACKEND_DIRECTORY ${CMAKE_INSTALL_LIBDIR}/wsm)
 ENDIF(NOT WSM_BACKEND_DIRECTORY)
 ADD_DEFINITIONS(-DWSM_BACKEND_DIRECTORY="${WSM_BACKEND_DIRECTORY}")
 
 IF(NOT WSM_DEFAULT_POLICY_PREFIX)
-	SET(WSM_DEFAULT_POLICY_PREFIX ${CMAKE_INSTALL_PREFIX}/var/share/security)
+	SET(WSM_DEFAULT_POLICY_PREFIX ${CMAKE_INSTALL_DATAROOTDIR}/security)
 ENDIF(NOT WSM_DEFAULT_POLICY_PREFIX)
 ADD_DEFINITIONS(-DWSM_DEFAULT_POLICY_PREFIX="${WSM_DEFAULT_POLICY_PREFIX}")
 
@@ -58,9 +55,9 @@ IF(WSM_LIB)
 	SET_PROPERTY(TARGET wsm PROPERTY VERSION 0.1.0)
 	SET_PROPERTY(TARGET wsm PROPERTY SOVERSION 1)
 	TARGET_LINK_LIBRARIES(wsm ${WAYLAND_SERVER_LIBRARIES} dl)
-	INSTALL(TARGETS wsm DESTINATION ${LIB_INSTALL_DIR})
-	INSTALL(FILES "${CMAKE_SOURCE_DIR}/include/libwsm.h" DESTINATION include)
-	INSTALL(DIRECTORY "${CMAKE_SOURCE_DIR}/include/wsm" DESTINATION include)
+	INSTALL(TARGETS wsm DESTINATION ${CMAKE_INSTALL_LIBDIR})
+	INSTALL(FILES "${CMAKE_SOURCE_DIR}/include/libwsm.h" DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
+	INSTALL(DIRECTORY "${CMAKE_SOURCE_DIR}/include/wsm" DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
 ENDIF(WSM_LIB)
 
 # default backend
@@ -75,7 +72,7 @@ ENDIF(WSM_BE_DEFAULT)
 #PKG-CONFIG
 set(LIBWSM_VERSION "0.1")
 configure_file(libwsm.pc.in libwsm.pc @ONLY)
-install(FILES "${CMAKE_CURRENT_BINARY_DIR}/libwsm.pc" DESTINATION lib/pkgconfig)
+install(FILES "${CMAKE_CURRENT_BINARY_DIR}/libwsm.pc" DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig)
 
 # Test
 add_executable(test_base "tests/base.c" "tests/unix_socket.c" "tests/unix_socket.h")
@@ -97,15 +94,15 @@ MESSAGE("Default : ${WSM_BE_DEFAULT} (-DWSM_BE_DEFAULT=OFF to deactivate)")
 MESSAGE("")
 
 MESSAGE("Options :")
-MESSAGE("	Build type: ${CMAKE_BUILD_TYPE} (-DCMAKE_BUILD_TYPE=Debug to debug)")
-MESSAGE("	Prefix: '${CMAKE_INSTALL_PREFIX}' (-DCMAKE_INSTALL_PREFIX=/your/prefix)")
-MESSAGE("	Lib prefix: '${LIB_INSTALL_DIR}' (-DLIB_INSTALL_DIR=/your/directory or -DLIB_SUFFIX=32/64//)")
-MESSAGE("	Backends directory: '${WSM_BACKEND_DIRECTORY}' (-DWSM_BACKEND_DIRECTORY=/your/prefix)")
+MESSAGE("	Build type   : ${CMAKE_BUILD_TYPE} (-DCMAKE_BUILD_TYPE=Debug to debug)")
+MESSAGE("	Prefix       : '${CMAKE_INSTALL_PREFIX}' (-DCMAKE_INSTALL_PREFIX=/your/prefix)")
+MESSAGE("	Backends dir : '${WSM_BACKEND_DIRECTORY}' (-DWSM_BACKEND_DIRECTORY=/your/prefix)")
+MESSAGE("	More dirs    : See CMake's GNUInstallDirs")
 MESSAGE("")
 
 IF(WSM_BE_DEFAULT)
 MESSAGE("Default backend :")
-MESSAGE("	Policy prefix: '${WSM_DEFAULT_POLICY_PREFIX}' (-DWSM_DEFAULT_POLICY_PREFIX=/your/prefix)")
+MESSAGE("	Policy dir : '${WSM_DEFAULT_POLICY_PREFIX}' (-DWSM_DEFAULT_POLICY_PREFIX=/your/prefix)")
 MESSAGE("")
 ENDIF(WSM_BE_DEFAULT)