From ed35df1701e0bed7a615e0eb54fc2273315ad629 Mon Sep 17 00:00:00 2001
From: Axel Naumann <Axel.Naumann@cern.ch>
Date: Wed, 4 May 2011 12:59:24 +0000
Subject: [PATCH] From Vassil Vassilev: Like in r126648, provide (empty)
 default implementation for pure virtual getMemoryBufferSizes(). Not all use
 cases have meaningful implementations.

llvm-svn: 130838
---
 clang/include/clang/AST/ExternalASTSource.h | 2 +-
 clang/lib/AST/ExternalASTSource.cpp         | 2 ++
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/clang/include/clang/AST/ExternalASTSource.h b/clang/include/clang/AST/ExternalASTSource.h
index 6db233641220..846813adf7c3 100644
--- a/clang/include/clang/AST/ExternalASTSource.h
+++ b/clang/include/clang/AST/ExternalASTSource.h
@@ -211,7 +211,7 @@ public:
     return sizes;
   }
 
-  virtual void getMemoryBufferSizes(MemoryBufferSizes &sizes) const = 0;
+  virtual void getMemoryBufferSizes(MemoryBufferSizes &sizes) const;
 
 protected:
   static DeclContextLookupResult
diff --git a/clang/lib/AST/ExternalASTSource.cpp b/clang/lib/AST/ExternalASTSource.cpp
index 89bf56db1af7..f428318a21e3 100644
--- a/clang/lib/AST/ExternalASTSource.cpp
+++ b/clang/lib/AST/ExternalASTSource.cpp
@@ -57,3 +57,5 @@ ExternalASTSource::FindExternalLexicalDecls(const DeclContext *DC,
                                          llvm::SmallVectorImpl<Decl*> &Result) {
   return true;
 }
+
+void ExternalASTSource::getMemoryBufferSizes(MemoryBufferSizes &sizes) const { }
-- 
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