It's a bug, see http://ghc.haskell.org/trac/ghc/ticket/10923 Workaround: use `-fforce-recomp`. On Sat, Oct 31, 2015 at 2:39 PM, Mateusz Kłoczko < mateusz.p.kloczko@gmail.com> wrote:

Hello

I would like to ask one question about optimization flags. For different n, executing ghc --make -On MyCode.hs doesn't force recompilation for both GHC 7.10.2 and 7.8.4.

Is this intended behaviour ? Or am I missing something ?

Regards, Mateusz Kłoczko

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