llvm-svn: 305574
This is a patch for bug: https://bugs.llvm.org/show_bug.cgi?id=6817 Warnings should not be emitted with -M and -MM flags, because this mode is only used for generate MakeFiles. llvm-svn: 305561
This avoids depending on pipefail not being used. llvm-svn: 185648
llvm-svn: 121284