[Haskell-cafe] Inject cabal version or VCS version as a CPP macro

[Eugene Kirpichov]

Hi,

I'd like my program to print something like "this is $program 1.0.4 git
45fea6b" when invoked with --version, or at least just the 1.0.4 part.

Can Cabal expose the version as a preprocessor macro by default, or do I
have to use Build-Type: Custom and add a preprocessing step of my own?

-- 
Eugene Kirpichov
Principal Engineer, Mirantis Inc. http://www.mirantis.com/
Editor, http://fprog.ru/
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