Silence unused function warning when graphviz is not available.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@152346 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Support/GraphWriter.cpp b/lib/Support/GraphWriter.cpp
index aca46d8b754749f8948fbec497112dc36bed5b94..32126ec39eba031fb9aabccf8ea25087406ad7de 100644 (file)
--- a/lib/Support/GraphWriter.cpp
+++ b/lib/Support/GraphWriter.cpp
@@ -54,11 +54,9 @@ std::string llvm::DOT::EscapeString(const std::string &Label) {
 }
 
 // Execute the graph viewer. Return true if successful.
-static bool ExecGraphViewer(const sys::Path &ExecPath,
-                            std::vector<const char*> &args,
-                            const sys::Path &Filename,
-                            bool wait,
-                            std::string &ErrMsg) {
+static bool LLVM_ATTRIBUTE_UNUSED
+ExecGraphViewer(const sys::Path &ExecPath, std::vector<const char*> &args,
+                const sys::Path &Filename, bool wait, std::string &ErrMsg) {
   if (wait) {
     if (sys::Program::ExecuteAndWait(ExecPath, &args[0],0,0,0,0,&ErrMsg)) {
       errs() << "Error: " << ErrMsg << "\n";