Latest ghc build error

[Joel Reymont]

/usr/local/bin/ghc -H16m -O  -istage1/utils  -istage1/basicTypes  - 
istage1/types  -istage1/hsSyn  -istage1/prelude  -istage1/rename  - 
istage1/typecheck  -istage1/deSugar  -istage1/coreSyn  -istage1/ 
specialise  -istage1/simplCore  -istage1/stranal  -istage1/stgSyn  - 
istage1/simplStg  -istage1/codeGen  -istage1/main  -istage1/ 
profiling  -istage1/parser  -istage1/cprAnalysis  -istage1/ 
ndpFlatten  -istage1/iface  -istage1/cmm  -istage1/nativeGen  - 
istage1/ghci -Istage1 -DGHCI -DBREAKPOINT -package template-haskell - 
threaded -package readline -DUSE_READLINE -cpp -fglasgow-exts -fno- 
generics -Rghc-timing -I. -IcodeGen -InativeGen -Iparser -package  
unix -ignore-package lang -recomp -Rghc-timing  -H16M '-#include  
"cutils.h"' -i../compat -ignore-package Cabal  -fno-cse  -c ghci/ 
InteractiveUI.hs -o stage1/ghci/InteractiveUI.o  -ohi stage1/ghci/ 
InteractiveUI.hi
/tmp/ghc17177_0.hc: In function 'smEl_ret':

/tmp/ghc17177_0.hc:42472:0:
      error: void value not ignored as it ought to be
/tmp/ghc17177_0.hc: In function 'smEf_ret':

/tmp/ghc17177_0.hc:42504:0:
      error: void value not ignored as it ought to be
<<ghc: 812568504 bytes, 1358 GCs, 15125404/31986692 avg/max bytes  
residency (10 samples), 80M in use, 0.00 INIT (0.00 elapsed), 2.39  
MUT (10.94 elapsed), 1.75 GC (1.86 elapsed) :ghc>>

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