Add --supported-languages support to dummy-ghc We used to call the bootstrapping compiler to get its --supported-languages but that doesn't work when it doesn't support all the extensions that we need. In particular, compiling the new bytestring which needs NamedFieldPuns broken when building with 6.8.2. There's now a rather ugly sed script to extract the extensions from DynFlags.hs.
Add --supported-languages support to dummy-ghc
We used to call the bootstrapping compiler to get its --supported-languages
but that doesn't work when it doesn't support all the extensions that we
need. In particular, compiling the new bytestring which needs NamedFieldPuns
broken when building with 6.8.2.
There's now a rather ugly sed script to extract the extensions from
DynFlags.hs.

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