Make LLVM command-line tools overwrite their output files without -f.
This is conventional command-line tool behavior. -f now just means
"enable binary output on terminals".

Add a -f option to llvm-extract and llvm-link, for consistency.

Remove F_Force from raw_fd_ostream and enable overwriting and
truncating by default. Introduce an F_Excl flag to permit users to
enable a failure when the file already exists. This flag is
currently unused.

Update Makefiles and documentation accordingly.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79990 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/opt/GraphPrinters.cpp b/tools/opt/GraphPrinters.cpp
index c38469c..1ae6be2 100644
--- a/tools/opt/GraphPrinters.cpp
+++ b/tools/opt/GraphPrinters.cpp
@@ -29,7 +29,7 @@
   std::string Filename = GraphName + ".dot";
   O << "Writing '" << Filename << "'...";
   std::string ErrInfo;
-  raw_fd_ostream F(Filename.c_str(), ErrInfo, raw_fd_ostream::F_Force);
+  raw_fd_ostream F(Filename.c_str(), ErrInfo);
 
   if (ErrInfo.empty())
     WriteGraph(F, GT);