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Ignore cabal_macros.h as a dependency #1195

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lukexi opened this issue Oct 19, 2015 · 1 comment
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Ignore cabal_macros.h as a dependency #1195

lukexi opened this issue Oct 19, 2015 · 1 comment

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@lukexi
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@lukexi lukexi commented Oct 19, 2015

As Michael says in #1134:

Also somewhat tangential, but: we may want to always ignore cabal_macros.h as a dependency. That file should only change meaningfully when our configure options have changed, and therefore recompiles triggered by that file should be meaningless.

I seem to get endless spurious rebuilds of my local packages due to cabal_macros.h — nearly every time I make a change. If I run stack build a few more times it eventually settles down.

It's of course particularly pernicious when the cabal_macros.h change is detected in package A, which is depended upon by B C D E F, yet I'm only actually making changes in package G that depends on all of the above.

@snoyberg
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@snoyberg snoyberg commented Oct 25, 2015

PR was merged, closing. Thanks!

@snoyberg snoyberg closed this Oct 25, 2015
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