cmake: Add release versioning variables

Also use shared library versioning .so.x.y.z

To create a new release, edit the main CMakeLists.txt and change
PROJECT_VER_PATCH, _MINOR, or _MAJOR.

CMake's builtin PROJECT_VERSION_* variables are not backward
compatible and not used here.

Author: xlz

CMakeLists.txt

@@ -1,5 +1,11 @@
 CMAKE_MINIMUM_REQUIRED(VERSION 2.8.12.1)
 
+SET(PROJECT_VER_MAJOR 0)
+SET(PROJECT_VER_MINOR 1)
+SET(PROJECT_VER_PATCH 0)
+SET(PROJECT_VER "${PROJECT_VER_MAJOR}.${PROJECT_VER_MINOR}.${PROJECT_VER_PATCH}")
+SET(PROJECT_APIVER "${PROJECT_VER_MAJOR}.${PROJECT_VER_MINOR}")
+
 if(WIN32 AND NOT MINGW)
   if(NOT DEFINED CMAKE_DEBUG_POSTFIX)
     set(CMAKE_DEBUG_POSTFIX "d")
@@ -214,9 +220,9 @@ ENDIF(ENABLE_OPENCL)
 # Both command line -DCMAKE_INSTALL_RPATH=... and CMake GUI settings are accepted.
 #
 # Anyway if wrong versions of libusb is used, errors will be reported explicitly.
-IF(NOT DEFINED CMAKE_INSTALL_RPATH)
+IF(NOT DEFINED CMAKE_INSTALL_RPATH AND NOT ${LibUSB_LIBDIR} MATCHES "^/usr/lib")
   SET(CMAKE_INSTALL_RPATH ${LibUSB_LIBDIR} CACHE STRING "Set RPATH for a private libusb")
-ELSE()
+ELSEIF(DEFINED CMAKE_INSTALL_RPATH)
   SET(CMAKE_INSTALL_RPATH ${CMAKE_INSTALL_RPATH} CACHE STRING "Set RPATH for a private libusb")
 ENDIF()
 IF(DEFINED CMAKE_INSTALL_RPATH)
@@ -231,6 +237,8 @@ ADD_LIBRARY(freenect2 ${SOURCES})
 SET_TARGET_PROPERTIES(freenect2 PROPERTIES
   CXX_VISIBILITY_PRESET hidden
   VISIBILITY_INLINES_HIDDEN 1
+  VERSION ${PROJECT_VER}
+  SOVERSION ${PROJECT_APIVER}
 )
 INCLUDE(GenerateExportHeader)
 GENERATE_EXPORT_HEADER(freenect2

doc/Doxyfile.in

@@ -1,6 +1,6 @@
 DOXYFILE_ENCODING      = UTF-8
 PROJECT_NAME           = @PROJECT_NAME@
-PROJECT_NUMBER         = @PROJECT_VERSION@
+PROJECT_NUMBER         = @PROJECT_APIVER@
 PROJECT_BRIEF          =
 PROJECT_LOGO           =
 OUTPUT_DIRECTORY       = @CMAKE_CURRENT_BINARY_DIR@

freenect2.cmake.in

@@ -8,3 +8,4 @@ FIND_PATH(freenect2_INCLUDE_DIR @PROJECT_NAME@/libfreenect2.hpp
     NO_DEFAULT_PATH
 )
 SET(freenect2_INCLUDE_DIRS ${freenect2_INCLUDE_DIR})
+SET(freenect2_VERSION @PROJECT_VER@)

freenect2.pc.in

@@ -5,8 +5,7 @@ includedir=${prefix}/include
 
 Name: freenect2 
 Description: Driver for the Kinect v2 (aka K4W) 
-Version: 
-Requires: @DEPS_PKGCONFIG@
+Version: @PROJECT_VER@
 Libs: -L${libdir} -lfreenect2
 Cflags: -I${includedir}