Duncan,

BTW why do you think the System.Info.os problem is MacOS specific? The buildbot seems to think otherwise:

  http://www.haskell.org/pipermail/cvs-ghc/2007-August/037167.html

So, no validate after all?

Manuel

Manuel M T Chakravarty wrote,
Duncan,

On Mon, 2007-08-06 at 12:44 +1000, Manuel M T Chakravarty wrote:
Running validate on the current (Mon Aug 6 12:42:45 EST 2007) head, gives me

/opt/local/bin/ghc -H64m -Onot -fasm -I. -Iinclude -Rghc-timing -O -fasm -ignore-package Cabal -ignore-package filepath -I../libraries -fglasgow-exts -no-recomp -c Distribution/System.hs -o Distribution/System.o -ohi Distribution/System.hi

../libraries/Cabal/Distribution/System.hs:14:10:
     Not in scope: `System.Info.os'

This is on MacOS compiling with GHC 6.6.1.

Duncan, did you run validate before pushing all these recent cabal patches?

Not that I am blaming people for breaking ghc head (since I did it too
recently with other Cabal patches) but I note that this particular bug
was committed by someone who does use validate on a regular basis. :-)
In this case, running validate would not have helped since the compile
error was conditional on #ifdef stuff that triggers on OSX (which I'm
fixing now...).

I'm not sure what this teaches us.

We talked about that when initially discussing validate. It would be too cumbersome to absolutely require testing on multiple platforms before a patch can be pushed. However, the rule, as explained at

  http://hackage.haskell.org/trac/ghc/wiki/TestingPatches

"Depending on the nature of the changes, more testing might be sensible. e.g. if possible, build system changes should be tested on Linux, Mac OS X and Windows machines."

So, it is up to the developer to apply some common sense in judging whether a patch my lead to issues on other platforms. I guess the message printed by a successful validate run could be a bit more precise in that respect.

And thanks for fixing this!
Manuel


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