README.md: expand the build and getting started section

Author: greenrobot

README.md

@@ -11,23 +11,37 @@ ObjectBox is a superfast cross-platform object-oriented database.
 ObjectBox Generator produces binding code for ObjectBox C, C++ and Go APIs (more languages to be supported in the future).
 This greatly simplifies using ObjectBox in your favourite language.
 
-## Prerequisites/Installation
+## Download
 
 Install the objectbox-generator by downloading the latest binary for your OS from [releases](https://github.com/objectbox/objectbox-generator/releases/latest).
 If you want, add it to `$PATH` for convenience.
-Alternatively, instead of downloading, you can build the generator yourself by cloning this repo and running `make`.
-To build yourself, you need a recent Go version, CMake and a C++11 tool chain.
+
+## Build 
+
+If you prefer to build the generator yourself (vs. downloading), clone this repo and simply run `make`.
+This will produce an "objectbox-generator" binary in the main project directory.
+
+Build notes:
+
+* To build yourself, you need Go, Make, CMake and a C++11 tool chain.
+* To run test suite, run `make test-depend test`.
+* `test-depend` needs to run only once to download objectbox core library and to build flatcc.
+* A full test cycle can be triggered by `make clean all test-depend test`.
 
 ## Getting started
 
-To get started, have a look at the projects based on your language of choice:
-* C and C++ [repository](https://github.com/objectbox/objectbox-c) and [docs](https://cpp.objectbox.io/)
-* Go [repository](https://github.com/objectbox/objectbox-go) and [docs](https://golang.objectbox.io/)
+To get started, have a look at the specific language bindings (the approaches differ):
+
+* C and C++ [repository](https://github.com/objectbox/objectbox-c) and [docs](https://cpp.objectbox.io/).
+  In summary, you define a FlatBuffers schema file, and the ObjectBox Generator will create plain C++ data classes
+  and helper classes that "glue" the data classes to the ObjectBox runtime library.
+* Go [repository](https://github.com/objectbox/objectbox-go) and [docs](https://golang.objectbox.io/).
+  Here, you start with Go data structs, for which the Generator generates the glue code directly.
 
 # License
 
 ```
-Copyright (C) 2022 ObjectBox Ltd. All rights reserved.
+Copyright (C) 2018-2024 ObjectBox Ltd. All rights reserved.
 https://objectbox.io
 This file is part of ObjectBox Generator.
 

internal/generator/generator.go

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020 ObjectBox Ltd. All rights reserved.
+ * Copyright (C) 2018-2024 ObjectBox Ltd. All rights reserved.
  * https://objectbox.io
  *
  * This file is part of ObjectBox Generator.
@@ -38,6 +38,8 @@ const Version = "0.14.0"
 
 // VersionId specifies the current generator version identifier.
 // It is used to validate generated code compatibility and is increased when there are changes in the generated code.
+// This validation seems to be limited to Go: the generated code "knows" its version,
+// and thus we can check at runtime if the generated code matches the lib version.
 // Internal generator changes that don't change the output (in an incompatible way) do not cause an increase.
 const VersionId = 6