Add SOVERSION when build shared libmxnet.so library

https://en.wikipedia.org/wiki/Soname
https://cmake.org/cmake/help/latest/prop_tgt/SOVERSION.html

CMakeLists.txt

@@ -1,5 +1,14 @@
 cmake_minimum_required(VERSION 3.13)
 
+file(READ "include/mxnet/base.h" ver)
+string(REGEX MATCH "MXNET_MAJOR ([0-9]*)" _ ${ver})
+set(ver_major ${CMAKE_MATCH_1})
+string(REGEX MATCH "MXNET_MINOR ([0-9]*)" _ ${ver})
+set(ver_minor ${CMAKE_MATCH_1})
+string(REGEX MATCH "MXNET_PATCH ([0-9]*)" _ ${ver})
+set(ver_patch ${CMAKE_MATCH_1})
+set(_PROJECT_VERSION "${ver_major}.${ver_minor}.${ver_patch}")
+
 # workaround to store CMAKE_CROSSCOMPILING because is getting reset by the project command
 if(CMAKE_CROSSCOMPILING)
   set(__CMAKE_CROSSCOMPILING ${CMAKE_CROSSCOMPILING})
@@ -704,6 +713,8 @@ if(UNIX)
   target_link_libraries(mxnet PRIVATE mxnet_static)
   target_link_libraries(mxnet_static PUBLIC ${CMAKE_DL_LIBS})
   set_target_properties(mxnet_static PROPERTIES OUTPUT_NAME mxnet)
+  set_target_properties(mxnet PROPERTIES VERSION "${ver_major}.${ver_minor}.${ver_patch}")
+  set_target_properties(mxnet PROPERTIES SOVERSION "${ver_major}")
   if(CMAKE_BUILD_TYPE STREQUAL "RelWithDebInfo")
     target_compile_options(mxnet_static PRIVATE "$<$<COMPILE_LANGUAGE:CXX>:-Werror>")
     # Ignore erroneous compiler warnings: