That's not a GHC flag; it's a haddock flag. Haddock (which, in case you're not familiar with it, is a program to generate documentation from Haskell source code) uses GHC, and the `optghc` flag lets you pass options to GHC when you invoke Haddock. See [the Haddock docs of the 6.12 era][1], on page 3.

It's also entirely possible that some program besides Haddock uses a flag of the same name (for the same purpose, one would hope).

[1]: http://www.haskell.org/ghc/docs/6.12.3/haddock.pdf

2013/8/23 <jabolopes@google.com>

Hi,

I am using GHC version 6.12.1.
What is optghc ?

I can't find that information anywhere...

Thanks,
Jose

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