From Axel: in my never ending fight to get things working even without ROOTSYS, at least when building ROOT, I encountered an error message for windows when no ROOTSYS is set.
From Axel:
in my never ending fight to get things working even without ROOTSYS, at
least when building ROOT, I encountered an error message for windows
when no ROOTSYS is set.


git-svn-id: acec3fd5b7ea1eb9e79d6329d318e8118ee2e14f@15851 27541ba8-7e3a-0410-8455-c3a389f83636

lgiommi/root,vukasinmilosevic/root,strykejern/TTreeReader,zzxuanyuan/root-compressor-dummy,buuck/root,esakellari/my_root_for_test,mkret2/root,buuck/root,simonpf/root,buuck/root,tc3t/qoot,zzxuanyuan/root-compressor-dummy,Duraznos/root,sawenzel/root,sbinet/cxx-root,arch1tect0r/root,mhuwiler/rootauto,mattkretz/root,esakellari/root,davidlt/root,BerserkerTroll/root,root-mirror/root,lgiommi/root,karies/root,esakellari/root,olifre/root,esakellari/my_root_for_test,mkret2/root,0x0all/ROOT,omazapa/root,georgtroska/root,gbitzes/root,Y--/root,esakellari/root,omazapa/root-old,satyarth934/root,alexschlueter/cern-root,ffurano/root5,davidlt/root,CristinaCristescu/root,agarciamontoro/root,kirbyherm/root-r-tools,BerserkerTroll/root,evgeny-boger/root,Duraznos/root,sawenzel/root,esakellari/root,omazapa/root,mhuwiler/rootauto,beniz/root,perovic/root,krafczyk/root,sirinath/root,esakellari/my_root_for_test,omazapa/root-old,veprbl/root,karies/root,nilqed/root,olifre/root,krafczyk/root,dfunke/root,sirinath/root,alexschlueter/cern-root,jrtomps/root,dfunke/root,strykejern/TTreeReader,abhinavmoudgil95/root,mhuwiler/rootauto,tc3t/qoot,abhinavmoudgil95/root,olifre/root,Duraznos/root,evgeny-boger/root,sawenzel/root,gganis/root,gbitzes/root,lgiommi/root,Y--/root,abhinavmoudgil95/root,Duraznos/root,gganis/root,0x0all/ROOT,kirbyherm/root-r-tools,simonpf/root,Duraznos/root,pspe/root,davidlt/root,cxx-hep/root-cern,smarinac/root,sbinet/cxx-root,abhinavmoudgil95/root,mattkretz/root,gganis/root,gbitzes/root,cxx-hep/root-cern,jrtomps/root,veprbl/root,Dr15Jones/root,root-mirror/root,gganis/root,karies/root,mhuwiler/rootauto,gbitzes/root,olifre/root,agarciamontoro/root,thomaskeck/root,mhuwiler/rootauto,ffurano/root5,Dr15Jones/root,Duraznos/root,cxx-hep/root-cern,sbinet/cxx-root,zzxuanyuan/root-compressor-dummy,zzxuanyuan/root,omazapa/root,smarinac/root,root-mirror/root,sbinet/cxx-root,dfunke/root,agarciamontoro/root,tc3t/qoot,veprbl/root,sawenzel/root,krafczyk/root,davidlt/root,arch1tect0r/root,Dr15Jones/root,smarinac/root,davidlt/root,karies/root,georgtroska/root,root-mirror/root,mkret2/root,davidlt/root,sbinet/cxx-root,CristinaCristescu/root,jrtomps/root,vukasinmilosevic/root,jrtomps/root,smarinac/root,mkret2/root,veprbl/root,omazapa/root-old,georgtroska/root,thomaskeck/root,omazapa/root-old,nilqed/root,vukasinmilosevic/root,abhinavmoudgil95/root,root-mirror/root,pspe/root,bbockelm/root,omazapa/root-old,sawenzel/root,satyarth934/root,lgiommi/root,mkret2/root,thomaskeck/root,simonpf/root,zzxuanyuan/root,root-mirror/root,cxx-hep/root-cern,mhuwiler/rootauto,mkret2/root,alexschlueter/cern-root,Duraznos/root,sirinath/root,omazapa/root,simonpf/root,zzxuanyuan/root,Dr15Jones/root,mhuwiler/rootauto,mkret2/root,lgiommi/root,esakellari/my_root_for_test,alexschlueter/cern-root,gbitzes/root,abhinavmoudgil95/root,buuck/root,karies/root,0x0all/ROOT,sirinath/root,bbockelm/root,thomaskeck/root,gganis/root,root-mirror/root,sawenzel/root,esakellari/my_root_for_test,beniz/root,abhinavmoudgil95/root,cxx-hep/root-cern,smarinac/root,jrtomps/root,esakellari/my_root_for_test,zzxuanyuan/root,dfunke/root,sirinath/root,evgeny-boger/root,sirinath/root,sawenzel/root,bbockelm/root,simonpf/root,mkret2/root,davidlt/root,olifre/root,0x0all/ROOT,olifre/root,jrtomps/root,dfunke/root,satyarth934/root,gbitzes/root,simonpf/root,gbitzes/root,zzxuanyuan/root,cxx-hep/root-cern,0x0all/ROOT,esakellari/root,veprbl/root,sbinet/cxx-root,dfunke/root,vukasinmilosevic/root,strykejern/TTreeReader,agarciamontoro/root,abhinavmoudgil95/root,satyarth934/root,kirbyherm/root-r-tools,Duraznos/root,sawenzel/root,jrtomps/root,Y--/root,beniz/root,esakellari/root,mhuwiler/rootauto,zzxuanyuan/root,bbockelm/root,strykejern/TTreeReader,alexschlueter/cern-root,Y--/root,georgtroska/root,davidlt/root,mhuwiler/rootauto,jrtomps/root,kirbyherm/root-r-tools,omazapa/root-old,ffurano/root5,cxx-hep/root-cern,alexschlueter/cern-root,pspe/root,agarciamontoro/root,simonpf/root,gganis/root,mattkretz/root,Y--/root,karies/root,georgtroska/root,veprbl/root,Y--/root,perovic/root,smarinac/root,mattkretz/root,mattkretz/root,mkret2/root,jrtomps/root,pspe/root,omazapa/root-old,evgeny-boger/root,dfunke/root,olifre/root,bbockelm/root,BerserkerTroll/root,satyarth934/root,agarciamontoro/root,esakellari/root,satyarth934/root,arch1tect0r/root,zzxuanyuan/root-compressor-dummy,simonpf/root,Y--/root,tc3t/qoot,evgeny-boger/root,sirinath/root,0x0all/ROOT,georgtroska/root,lgiommi/root,kirbyherm/root-r-tools,nilqed/root,bbockelm/root,gbitzes/root,vukasinmilosevic/root,pspe/root,buuck/root,veprbl/root,mattkretz/root,ffurano/root5,0x0all/ROOT,buuck/root,satyarth934/root,gganis/root,strykejern/TTreeReader,Y--/root,tc3t/qoot,sbinet/cxx-root,CristinaCristescu/root,krafczyk/root,nilqed/root,krafczyk/root,agarciamontoro/root,abhinavmoudgil95/root,krafczyk/root,beniz/root,CristinaCristescu/root,arch1tect0r/root,thomaskeck/root,cxx-hep/root-cern,nilqed/root,thomaskeck/root,perovic/root,beniz/root,BerserkerTroll/root,alexschlueter/cern-root,zzxuanyuan/root-compressor-dummy,0x0all/ROOT,olifre/root,perovic/root,arch1tect0r/root,gganis/root,davidlt/root,tc3t/qoot,esakellari/root,Duraznos/root,satyarth934/root,evgeny-boger/root,arch1tect0r/root,sawenzel/root,nilqed/root,omazapa/root,perovic/root,tc3t/qoot,zzxuanyuan/root,georgtroska/root,zzxuanyuan/root-compressor-dummy,sbinet/cxx-root,CristinaCristescu/root,bbockelm/root,vukasinmilosevic/root,smarinac/root,sawenzel/root,smarinac/root,evgeny-boger/root,gbitzes/root,sbinet/cxx-root,pspe/root,omazapa/root,dfunke/root,sbinet/cxx-root,vukasinmilosevic/root,omazapa/root,ffurano/root5,mattkretz/root,BerserkerTroll/root,omazapa/root,gganis/root,tc3t/qoot,bbockelm/root,buuck/root,mattkretz/root,arch1tect0r/root,perovic/root,sirinath/root,agarciamontoro/root,pspe/root,smarinac/root,omazapa/root,veprbl/root,lgiommi/root,agarciamontoro/root,nilqed/root,sirinath/root,pspe/root,pspe/root,thomaskeck/root,CristinaCristescu/root,karies/root,krafczyk/root,Dr15Jones/root,georgtroska/root,lgiommi/root,Duraznos/root,georgtroska/root,simonpf/root,sirinath/root,abhinavmoudgil95/root,pspe/root,mattkretz/root,CristinaCristescu/root,zzxuanyuan/root-compressor-dummy,dfunke/root,veprbl/root,vukasinmilosevic/root,arch1tect0r/root,davidlt/root,olifre/root,mhuwiler/rootauto,georgtroska/root,CristinaCristescu/root,kirbyherm/root-r-tools,thomaskeck/root,arch1tect0r/root,gbitzes/root,BerserkerTroll/root,beniz/root,omazapa/root-old,karies/root,evgeny-boger/root,buuck/root,olifre/root,dfunke/root,mhuwiler/rootauto,Y--/root,perovic/root,bbockelm/root,root-mirror/root,0x0all/ROOT,zzxuanyuan/root-compressor-dummy,bbockelm/root,Dr15Jones/root,perovic/root,nilqed/root,omazapa/root-old,zzxuanyuan/root,krafczyk/root,vukasinmilosevic/root,dfunke/root,sbinet/cxx-root,mattkretz/root,zzxuanyuan/root-compressor-dummy,beniz/root,Duraznos/root,esakellari/my_root_for_test,Dr15Jones/root,nilqed/root,strykejern/TTreeReader,krafczyk/root,zzxuanyuan/root,sawenzel/root,davidlt/root,esakellari/my_root_for_test,abhinavmoudgil95/root,buuck/root,jrtomps/root,omazapa/root,thomaskeck/root,strykejern/TTreeReader,satyarth934/root,CristinaCristescu/root,karies/root,ffurano/root5,satyarth934/root,veprbl/root,BerserkerTroll/root,zzxuanyuan/root,evgeny-boger/root,satyarth934/root,BerserkerTroll/root,agarciamontoro/root,nilqed/root,smarinac/root,beniz/root,lgiommi/root,root-mirror/root,karies/root,krafczyk/root,krafczyk/root,olifre/root,Y--/root,omazapa/root-old,buuck/root,bbockelm/root,esakellari/root,beniz/root,lgiommi/root,mkret2/root,agarciamontoro/root,evgeny-boger/root,mkret2/root,tc3t/qoot,beniz/root,esakellari/my_root_for_test,omazapa/root-old,karies/root,beniz/root,veprbl/root,CristinaCristescu/root,esakellari/root,gganis/root,buuck/root,BerserkerTroll/root,BerserkerTroll/root,Y--/root,georgtroska/root,root-mirror/root,pspe/root,gbitzes/root,zzxuanyuan/root,BerserkerTroll/root,kirbyherm/root-r-tools,perovic/root,evgeny-boger/root,gganis/root,arch1tect0r/root,omazapa/root,mattkretz/root,root-mirror/root,vukasinmilosevic/root,thomaskeck/root,lgiommi/root,nilqed/root,CristinaCristescu/root,esakellari/my_root_for_test,perovic/root,zzxuanyuan/root,arch1tect0r/root,simonpf/root,simonpf/root,jrtomps/root,vukasinmilosevic/root,sirinath/root,zzxuanyuan/root-compressor-dummy,zzxuanyuan/root-compressor-dummy,perovic/root,tc3t/qoot,esakellari/root,ffurano/root5