GHC and Xcode 3 vs. 4

[Mark Lentczner]

I'm getting ready to build the Mac installers for the upcoming version of
Haskell Platform. I've recently upgraded to a spiffy new MacBook Air and am
running Lion on this machine, though still have machines with bootable 10.5
and 10.6 partitions....

I'm wondering what is the state of building with Xcode 4 installed? Is that
a happy thing? Seems that GHC 7.0.4 (what the next HP will be using) was
compiled with Xcode 3.2. Do we know if builds are Xcode agnostic... that is,
if GHC was built with one version of Xcode, will it install and work on some
user's machine with the bintools from the other version of Xcode? Similarly,
do we have a sense of the interoperability between bulit-on vs. installed-on
for 10.5, 10.6, and 10.7?

My hope is to do all future builds on 10.7 w/Xcode 4, and hope that will
install and work for people with 10.6, 10.5, and those with Xcode 3.

  - Mark
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