#3780: unix-2.4.0.0 fails with base 4.1
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Reporter: duncan | Owner:
Type: bug | Status: new
Priority: normal | Milestone:
Component: libraries/unix | Version: 6.12.1
Resolution: | Keywords:
Difficulty: Easy (less than 1 hour) | Os: Unknown/Multiple
Testcase: | Architecture: Unknown/Multiple
Failure: Other |
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Comment (by duncan):
Replying to [comment:1 simonmar]:
> Isn't the problem here that the dependency on base is wrong, and should
really say `>= 4.2`? Does that lead to different problems?
That would be another solution.
The only problem there is an inconvenience because cabal-install's current
solver does not handle this case well. If someone tries to install unix
for ghc 6.10 (or it needs to rebuilt to make something else work) then
cabal does not pick unix-2.3.x instead, it picks unix 2.4 and then fails
when it finds that could not be configured with ghc 6.10. Obviously,
that's not a problem with the unix package, it's a problem that the solver
isn't very smart.
If there are any actual improvements in the unix 2.4 version then of
course it can be nice to let it build with older versions of base.
The main thing though is that the declared dependencies be accurate,
either by adjusting the deps or by other fixes.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3780#comment:2>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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