mkDerivedConstants.c depends on ghcplatform.h I think this missing dep is what broke my parallel build I used make -j2 with ghc-6.4.2.20060323 and got:
mkDerivedConstants.c depends on ghcplatform.h
I think this missing dep is what broke my parallel build
I used make -j2 with ghc-6.4.2.20060323 and got:

------------------------------------------------------------------------
==fptools== make boot -wr --jobserver-fds=3,11 -j;
in /var/tmp/portage/ghc-6.4.2_pre20060323/work/ghc-6.4.2.20060323/ghc/includes
------------------------------------------------------------------------
Creating ghcplatform.h...
Done.
gcc -O -O2 -march=k8 -pipe -Wa,--noexecstack    -c mkDerivedConstants.c -o mkDerivedConstants.o
In file included from ghcconfig.h:5,
                 from Stg.h:42,
                 from Rts.h:19,
                 from mkDerivedConstants.c:20:
ghcplatform.h:1:1: unterminated #ifndef
Done.
						    
With this patch applied I can no longer repoduce this build bug.
So I think this patch should be applied to the cvs ghc-6-4-branch too.

ghc-android/ghc,ezyang/ghc,mcmaniac/ghc,acowley/ghc,olsner/ghc,GaloisInc/halvm-ghc,mettekou/ghc,AlexanderPankiv/ghc,lukexi/ghc,ekmett/ghc,nushio3/ghc,elieux/ghc,wxwxwwxxx/ghc,mcschroeder/ghc,nomeata/ghc,shlevy/ghc,mfine/ghc,christiaanb/ghc,ml9951/ghc,nomeata/ghc,oldmanmike/ghc,nomeata/ghc,holzensp/ghc,tjakway/ghcjvm,vTurbine/ghc,elieux/ghc,frantisekfarka/ghc-dsi,shlevy/ghc,gcampax/ghc,wxwxwwxxx/ghc,gridaphobe/ghc,jstolarek/ghc,da-x/ghc,mettekou/ghc,TomMD/ghc,mcschroeder/ghc,acowley/ghc,christiaanb/ghc,fmthoma/ghc,elieux/ghc,tjakway/ghcjvm,gridaphobe/ghc,green-haskell/ghc,ezyang/ghc,vikraman/ghc,ml9951/ghc,AlexanderPankiv/ghc,wxwxwwxxx/ghc,gridaphobe/ghc,ryantm/ghc,christiaanb/ghc,nkaretnikov/ghc,tjakway/ghcjvm,lukexi/ghc,acowley/ghc,forked-upstream-packages-for-ghcjs/ghc,olsner/ghc,acowley/ghc,vikraman/ghc,siddhanathan/ghc,snoyberg/ghc,siddhanathan/ghc,sgillespie/ghc,sgillespie/ghc,mcmaniac/ghc,lukexi/ghc-7.8-arm64,GaloisInc/halvm-ghc,mcschroeder/ghc,nkaretnikov/ghc,hferreiro/replay,spacekitteh/smcghc,TomMD/ghc,spacekitteh/smcghc,GaloisInc/halvm-ghc,acowley/ghc,oldmanmike/ghc,ml9951/ghc,TomMD/ghc,ilyasergey/GHC-XAppFix,da-x/ghc,wxwxwwxxx/ghc,jstolarek/ghc,bitemyapp/ghc,ilyasergey/GHC-XAppFix,bitemyapp/ghc,bitemyapp/ghc,mcschroeder/ghc,olsner/ghc,ryantm/ghc,mcschroeder/ghc,lukexi/ghc,sdiehl/ghc,mettekou/ghc,elieux/ghc,oldmanmike/ghc,siddhanathan/ghc,oldmanmike/ghc,urbanslug/ghc,anton-dessiatov/ghc,holzensp/ghc,siddhanathan/ghc,anton-dessiatov/ghc,nkaretnikov/ghc,nushio3/ghc,gridaphobe/ghc,ghc-android/ghc,holzensp/ghc,siddhanathan/ghc,christiaanb/ghc,gridaphobe/ghc,wxwxwwxxx/ghc,anton-dessiatov/ghc,bitemyapp/ghc,forked-upstream-packages-for-ghcjs/ghc,vikraman/ghc,ezyang/ghc,ml9951/ghc,sgillespie/ghc,green-haskell/ghc,ryantm/ghc,ezyang/ghc,snoyberg/ghc,ezyang/ghc,vTurbine/ghc,sdiehl/ghc,ghc-android/ghc,tibbe/ghc,AlexanderPankiv/ghc,mettekou/ghc,GaloisInc/halvm-ghc,TomMD/ghc,jstolarek/ghc,ml9951/ghc,mfine/ghc,mcschroeder/ghc,tjakway/ghcjvm,anton-dessiatov/ghc,nkaretnikov/ghc,sgillespie/ghc,mcmaniac/ghc,nathyong/microghc-ghc,snoyberg/ghc,holzensp/ghc,urbanslug/ghc,gcampax/ghc,nkaretnikov/ghc,urbanslug/ghc,lukexi/ghc-7.8-arm64,bitemyapp/ghc,hferreiro/replay,hferreiro/replay,hferreiro/replay,fmthoma/ghc,urbanslug/ghc,green-haskell/ghc,forked-upstream-packages-for-ghcjs/ghc,nathyong/microghc-ghc,shlevy/ghc,da-x/ghc,tjakway/ghcjvm,gridaphobe/ghc,ml9951/ghc,sgillespie/ghc,GaloisInc/halvm-ghc,sgillespie/ghc,spacekitteh/smcghc,christiaanb/ghc,elieux/ghc,gcampax/ghc,da-x/ghc,oldmanmike/ghc,holzensp/ghc,nushio3/ghc,nkaretnikov/ghc,wxwxwwxxx/ghc,da-x/ghc,hferreiro/replay,anton-dessiatov/ghc,fmthoma/ghc,AlexanderPankiv/ghc,tjakway/ghcjvm,GaloisInc/halvm-ghc,frantisekfarka/ghc-dsi,christiaanb/ghc,nomeata/ghc,fmthoma/ghc,nushio3/ghc,ilyasergey/GHC-XAppFix,forked-upstream-packages-for-ghcjs/ghc,tibbe/ghc,ghc-android/ghc,ekmett/ghc,TomMD/ghc,nathyong/microghc-ghc,oldmanmike/ghc,nushio3/ghc,elieux/ghc,siddhanathan/ghc,TomMD/ghc,sdiehl/ghc,urbanslug/ghc,tibbe/ghc,oldmanmike/ghc,da-x/ghc,gcampax/ghc,mettekou/ghc,sdiehl/ghc,frantisekfarka/ghc-dsi,da-x/ghc,AlexanderPankiv/ghc,snoyberg/ghc,lukexi/ghc,christiaanb/ghc,mettekou/ghc,vTurbine/ghc,nushio3/ghc,frantisekfarka/ghc-dsi,nathyong/microghc-ghc,shlevy/ghc,olsner/ghc,elieux/ghc,vikraman/ghc,olsner/ghc,vTurbine/ghc,mfine/ghc,mfine/ghc,vTurbine/ghc,nathyong/microghc-ghc,gcampax/ghc,gcampax/ghc,lukexi/ghc,ghc-android/ghc,TomMD/ghc,hferreiro/replay,fmthoma/ghc,spacekitteh/smcghc,shlevy/ghc,mfine/ghc,hferreiro/replay,olsner/ghc,GaloisInc/halvm-ghc,olsner/ghc,AlexanderPankiv/ghc,siddhanathan/ghc,anton-dessiatov/ghc,lukexi/ghc-7.8-arm64,snoyberg/ghc,snoyberg/ghc,tibbe/ghc,acowley/ghc,forked-upstream-packages-for-ghcjs/ghc,acowley/ghc,mettekou/ghc,vikraman/ghc,ekmett/ghc,shlevy/ghc,ekmett/ghc,sdiehl/ghc,green-haskell/ghc,frantisekfarka/ghc-dsi,anton-dessiatov/ghc,nkaretnikov/ghc,gcampax/ghc,vikraman/ghc,ml9951/ghc,spacekitteh/smcghc,jstolarek/ghc,lukexi/ghc-7.8-arm64,ghc-android/ghc,nathyong/microghc-ghc,sdiehl/ghc,mfine/ghc,fmthoma/ghc,ryantm/ghc,tibbe/ghc,jstolarek/ghc,nomeata/ghc,wxwxwwxxx/ghc,shlevy/ghc,lukexi/ghc-7.8-arm64,gridaphobe/ghc,ml9951/ghc,sdiehl/ghc,mcschroeder/ghc,ezyang/ghc,urbanslug/ghc,vikraman/ghc,tjakway/ghcjvm,sgillespie/ghc,ilyasergey/GHC-XAppFix,urbanslug/ghc,ryantm/ghc,mfine/ghc,fmthoma/ghc,nathyong/microghc-ghc,vTurbine/ghc,mcmaniac/ghc,ekmett/ghc,vTurbine/ghc,ezyang/ghc,snoyberg/ghc,forked-upstream-packages-for-ghcjs/ghc,green-haskell/ghc,ghc-android/ghc,forked-upstream-packages-for-ghcjs/ghc,nushio3/ghc,mcmaniac/ghc,AlexanderPankiv/ghc