2 files changed, 11 insertions, 0 deletions
diff --git a/Source/cmMakefile.cxx b/Source/cmMakefile.cxx
index f1d706e..ec8871b 100644
--- a/Source/cmMakefile.cxx
+++ b/Source/cmMakefile.cxx
@@ -586,6 +586,11 @@ void cmMakefile::AddCacheDefinition(const char* name, bool value, const char* do
   this->AddDefinition(name, value);
 }
 
+void cmMakefile::RemoveDefinition(const char* name)
+{
+  m_Definitions.erase(DefinitionMap::key_type(name));
+}
+
 void cmMakefile::SetProjectName(const char* p)
 {
   m_ProjectName = p;
diff --git a/Source/cmMakefile.h b/Source/cmMakefile.h
index ae5704c..c14a4e3 100644
--- a/Source/cmMakefile.h
+++ b/Source/cmMakefile.h
@@ -200,6 +200,12 @@ public:
   void AddCacheDefinition(const char* name, bool, const char* doc);
 
   /**
+   * Remove a variable definition from the build.  This is not valid
+   * for cache entries, and will only affect the current makefile.
+   */
+  void RemoveDefinition(const char* name);
+  
+  /**
    * Specify the name of the project for this build.
    */
   void SetProjectName(const char*);