add clang -cc1 level support for "-ferror-limit 42"


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@100687 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Frontend/Warnings.cpp b/lib/Frontend/Warnings.cpp
index ea9635e..39cda87 100644
--- a/lib/Frontend/Warnings.cpp
+++ b/lib/Frontend/Warnings.cpp
@@ -35,6 +35,10 @@
                                   const DiagnosticOptions &Opts) {
   Diags.setSuppressSystemWarnings(true);  // Default to -Wno-system-headers
   Diags.setIgnoreAllWarnings(Opts.IgnoreWarnings);
+  
+  // Handle -ferror-limit
+  if (Opts.ErrorLimit)
+    Diags.setErrorLimit(Opts.ErrorLimit);
 
   // If -pedantic or -pedantic-errors was specified, then we want to map all
   // extension diagnostics onto WARNING or ERROR unless the user has futz'd