Autoincrement builds counter

[iddqd]

I want to implement an autoincrement builds counter. For example, I'm define some constant in one of #include files of my project, like this

#define BUILD_NUM 123

#define BUILD_NUM 123

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And now I need that BUILD_NUM on each build will increment on 1. How to do that?

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Qt 4.6 for Win32, QtCreator