From eb994b27ffd1c4c7ad6ee69177d5a175659bd554 Mon Sep 17 00:00:00 2001
From: Peter Collingbourne <peter@pcc.me.uk>
Date: Tue, 14 Jun 2011 03:55:38 +0000
Subject: [PATCH] Declare CompareHistoryEvents and IsCurrentHistoryEvent as
 pure virtual functions

Fixes the Linux build.

llvm-svn: 132967
---
 lldb/include/lldb/Core/History.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lldb/include/lldb/Core/History.h b/lldb/include/lldb/Core/History.h
index 181677392e44..b3626882f843 100644
--- a/lldb/include/lldb/Core/History.h
+++ b/lldb/include/lldb/Core/History.h
@@ -70,10 +70,10 @@ public:
     // Return 0 when lhs == rhs, 1 if lhs > rhs, or -1 if lhs < rhs.
     virtual int
     CompareHistoryEvents (const HistoryEvent lhs, 
-                          const HistoryEvent rhs);
+                          const HistoryEvent rhs) = 0;
     
     virtual bool
-    IsCurrentHistoryEvent (const HistoryEvent event);
+    IsCurrentHistoryEvent (const HistoryEvent event) = 0;
 
 private:
     typedef std::stack<HistoryEvent> collection;