OS X: ld: warning: -read_only_relocs cannot be used with x86_64

From http://www.haskell.org/pipermail/glasgow-haskell-users/2011-February/020086.html

I'm getting a warning from the linker when building programs using the 64-bit   
version of the release candidate on Mac OS X 10.6.                              
                                                                                
$ cat Hello.hs                                                                  
module Main where                                                               
main = putStrLn "Hello, World"                                                  
                                                                                
$ ~/ghc-7/bin/ghc -fforce-recomp Hello.hs                                       
[1 of 1] Compiling Main             ( Hello.hs, Hello.o )                       
Linking Hello ...                                                               
ld: warning: -read_only_relocs cannot be used with x86_64                       
                                                                                
It doesn't seem to cause a problem when actually running the programs, from what
I have seen so far.                                                             

Trac metadata

Trac field	Value
Version	7.0.1
Type	Bug
TypeOfFailure	OtherFailure
Priority	high
Resolution	Unresolved
Component	Compiler
Test case
Differential revisions
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Related
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Operating system	Unknown/Multiple
Architecture	Unknown/Multiple