GHC 7.4.1 RC1 doesn't work with Xcode 4.2.1

Xcode 4.2 removed gcc-4.2 now. But GHC 7.4.1 RC 1 uses gcc-4.2 as gcc. This behavior causes problem when compiling program.

$ ghc -c Export.hs
ghc: could not execute: /Developer/usr/bin/gcc-4.2

$ ghc Test.hs
[1 of 1] Compiling Main             ( Test.hs, Test.o )
ghc: could not execute: /Developer/usr/bin/gcc-4.2

GHC-7.4.0.20111219-i386.pkg and GHC-7.4.0.20111219-x86_64.pkg causes this problem.

And when using ghc-7.4.0.20111219-i386-apple-darwin.tar.bz2, ./configure causes error.

$ ./configure
checking for path to top of build tree... /Users/shelarcy/Desktop/ghc-7.4.0.20111219
Build platform inferred as: i386-apple-darwin
Host platform inferred as: i386-apple-darwin
Target platform inferred as: i386-apple-darwin
GHC build  : i386-apple-darwin
GHC host   : i386-apple-darwin
GHC target : i386-apple-darwin
checking for perl... /opt/local/bin/perl
checking if your perl works in shell scripts... yes
checking for a BSD-compatible install... /usr/bin/install -c
checking whether ln -s works... yes
checking for gsed... sed
checking XCode version... 4.2.1
configure: XCode version component 1: 4
configure: XCode version component 2: 2
checking for gcc-4.2... no
configure: error: cannot find gcc-4.2 in your PATH, no idea how to link

I can build program by GHC 7.2.2 (with some warning), and Haskell Platform 2011.4.0.0's GHC 7.0.4. So, I think this behavior is wrong.

Trac field	Value
Version	7.3
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler
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