[CMake] Build Number

[Renan Biegelmeyer da Silva]

Hello,

We have here several projects is this structure:

MainProj (version 1.0.0.0-1)
|
|--- proj1 (version 1.0.0.0-1)
|--- proj2 (version 1.0.0.0-1)
|             |
|             |---proj2.1 (version 1.0.0.0-1)
|--- proj3 (version 1.0.0.0-1)
                |
                |---proj3.1 (version 1.0.0.0-1)
...

Our release convention is A.B.C.D-E:
A -> major
B -> minor
C -> micro
D -> patch
E -> build number

Sometimes we make modifications on some of this projects. Suppose I change some code on proj1 and proj2.1.

MainProj (version 1.0.0.0-2) - this recompiled because it's dependencies have changed
|
|--- proj1 (version 1.0.0.1-1) - this is recompiled because it's code have changed
|--- proj2 (version 1.0.0.0-2) - this recompiled because it's dependencies have changed
|             |
|             |---proj2.1 (version 1.0.0.1-1) - this is recompiled because it's code have changed
|--- proj3 (version 1.0.0.0-1) - this haven't changed
                |
                |---proj3.1 (version 1.0.0.0-1) - this haven't changed

So, my question is:
Is there a way to detect a rebuilt (code has NOT changed) and increment it's build number? And when code change increment it's patch number?

Regards,
Renan Biegelmeyer
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