Implement basic library versioning for shared library builds

Author: dkonigsberg

CMakeLists.txt

@@ -2,6 +2,11 @@ cmake_minimum_required(VERSION 2.8.4)
 set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_SOURCE_DIR}/CMakeModules/")
 project(signal-protocol-c)
 
+SET(SIGNAL_PROTOCOL_C_VERSION_MAJOR 2)
+SET(SIGNAL_PROTOCOL_C_VERSION_MINOR 3)
+SET(SIGNAL_PROTOCOL_C_VERSION_PATCH 1)
+SET(SIGNAL_PROTOCOL_C_VERSION ${SIGNAL_PROTOCOL_C_VERSION_MAJOR}.${SIGNAL_PROTOCOL_C_VERSION_MINOR}.${SIGNAL_PROTOCOL_C_VERSION_PATCH})
+
 SET(LIB_SUFFIX "" CACHE STRING "Define suffix of directory name (32/64)")
 SET(LIB_INSTALL_DIR "${CMAKE_INSTALL_PREFIX}/lib${LIB_SUFFIX}" CACHE STRING "Directory where lib will install")
 SET(INCLUDE_INSTALL_DIR "${CMAKE_INSTALL_PREFIX}/include" CACHE PATH "The directory the headers are installed in")

src/CMakeLists.txt

@@ -73,6 +73,10 @@ add_library(signal-protocol-c
 
 if(BUILD_SHARED_LIBS)
 	target_link_libraries(signal-protocol-c ${M_LIB})
+	set_target_properties(signal-protocol-c PROPERTIES
+		VERSION ${SIGNAL_PROTOCOL_C_VERSION}
+		SOVERSION ${SIGNAL_PROTOCOL_C_VERSION_MAJOR}
+	)
 endif()
 
 INSTALL(