[project @ 2003-02-04 11:55:54 by simonmar] Add support for using vfork, which I apparently removed when this file was moved over from ghc/lib/std/cbits.  Using vfork on Linux makes quite a big difference - eg. when building GHC.Base with -split-objs , I saw a 2.5s reduction in system time.
[project @ 2003-02-04 11:55:54 by simonmar]
Add support for using vfork, which I apparently removed when this file
was moved over from ghc/lib/std/cbits.  Using vfork on Linux makes
quite a big difference - eg. when building GHC.Base with -split-objs ,
I saw a 2.5s reduction in system time.

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