gnome: add version to cmake

Refs #69346

Change-Id: I320654316e296bc4be640a8266d22b5ba8c57f7f
diff --git a/src/config.h.in b/src/config.h.in
new file mode 100644
index 0000000..4b5a6d4
--- /dev/null
+++ b/src/config.h.in
@@ -0,0 +1,5 @@
+/* cmake will generate config.h with defines containing the values defined in cmake */
+
+#define VERSION_MAJOR @PROJECT_VERSION_MAJOR@
+#define VERSION_MINOR @PROJECT_VERSION_MINOR@
+#define VERSION_PATCH @PROJECT_VERSION_PATCH@
\ No newline at end of file