From edc738173b8a50e65557ea0fc237a3432621aa3a Mon Sep 17 00:00:00 2001
From: Sebastien Barre <sebastien.barre@kitware.com>
Date: Sun, 19 Aug 2001 19:11:59 -0400
Subject: Allow option value to be expanded (thus, we can use the value of
 another option as default)

---
 Source/cmOptionCommand.cxx | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/Source/cmOptionCommand.cxx b/Source/cmOptionCommand.cxx
index db3c007..3e167de 100644
--- a/Source/cmOptionCommand.cxx
+++ b/Source/cmOptionCommand.cxx
@@ -55,13 +55,14 @@ bool cmOptionCommand::InitialPass(std::vector<std::string>& args)
     = m_Makefile->GetDefinition(args[0].c_str());
   if(!cacheValue)
     {
-    const char* initialValue = "Off";
+    std::string initialValue = "Off";
     if(args.size() == 3)
       {
-      initialValue = args[2].c_str();
+      initialValue = args[2];
+      m_Makefile->ExpandVariablesInString(initialValue);
       }
     m_Makefile->AddCacheDefinition(args[0].c_str(),
-                                   cmSystemTools::IsOn(initialValue),
+                                   cmSystemTools::IsOn(initialValue.c_str()),
                                    args[1].c_str());
     }
   else
-- 
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