added cmake script to set the version number cmake variables as needed by...

added cmake script to set the version number cmake variables as needed by other scripts of the project-template

cmake/set_version_numbers.cmake

+#######################################################################################################################
+# set_version_numbers.cmake
+#
+# Set the version numbers for a package in the format needed by other scripts of the project-template
+#
+# Expects the following input variables:
+#   ${PROJECT_NAME}_MAJOR_VERSION - major version number
+#   ${PROJECT_NAME}_MINOR_VERSION - minor version number
+#   ${PROJECT_NAME}_PATCH_VERSION - patch number
+#
+# Optional environment variables:
+#   $PROJECT_BUILDVERSION - additional build version number for the shared object version number (e.g. "xenial1")
+#
+#######################################################################################################################
+
+#######################################################################################################################
+#
+# IMPORTANT NOTE:
+#
+# DO NOT MODIFY THIS FILE inside a project. Instead update the project-template repository and pull the change from
+# there. Make sure to keep the file generic, since it will be used by other projects, too.
+#
+# If you have modified this file inside a project despite this warning, make sure to cherry-pick all your changes
+# into the project-template repository immediately.
+#
+#######################################################################################################################
+
+set(${PROJECT_NAME}_VERSION ${${PROJECT_NAME}_MAJOR_VERSION}.${${PROJECT_NAME}_MINOR_VERSION}.${${PROJECT_NAME}_PATCH_VERSION})
+
+set(${PROJECT_NAME}_SOVERSION ${${PROJECT_NAME}_MAJOR_VERSION}.${${PROJECT_NAME}_MINOR_VERSION})
+set(${PROJECT_NAME}_BUILDVERSION $ENV{PROJECT_BUILDVERSION})
+if( ${PROJECT_NAME}_BUILDVERSION )
+  set(${PROJECT_NAME}_SOVERSION "${${PROJECT_NAME}_SOVERSION}${${PROJECT_NAME}_BUILDVERSION}")
+endif( ${PROJECT_NAME}_BUILDVERSION )
+
+set(${PROJECT_NAME}_FULL_LIBRARY_VERSION ${${PROJECT_NAME}_SOVERSION}.${${PROJECT_NAME}_PATCH_VERSION})
+