cmMakefile: Use a hashmap for imported targets

Source/cmMakefile.cxx

@@ -3911,8 +3911,7 @@ cmTarget* cmMakefile::FindTarget(const std::string& name,
 {
   if (!excludeAliases)
     {
-    std::map<std::string, cmTarget*>::const_iterator i
-                                              = this->AliasTargets.find(name);
+    TargetMap::const_iterator i = this->AliasTargets.find(name);
     if (i != this->AliasTargets.end())
       {
       return i->second;
@@ -4134,7 +4133,7 @@ cmTarget* cmMakefile::FindTargetToUse(const std::string& name,
 {
   // Look for an imported target.  These take priority because they
   // are more local in scope and do not have to be globally unique.
-  std::map<std::string, cmTarget*>::const_iterator
+  TargetMap::const_iterator
     imported = this->ImportedTargets.find(name);
   if(imported != this->ImportedTargets.end())
     {

Source/cmMakefile.h

@@ -909,7 +909,12 @@ protected:
 
   // libraries, classes, and executables
   mutable cmTargets Targets;
-  std::map<std::string, cmTarget*> AliasTargets;
+#if defined(CMAKE_BUILD_WITH_CMAKE)
+  typedef cmsys::hash_map<std::string, cmTarget*> TargetMap;
+#else
+  typedef std::map<std::string, cmTarget*> TargetMap;
+#endif
+  TargetMap AliasTargets;
   cmGeneratorTargetsType GeneratorTargets;
   std::vector<cmSourceFile*> SourceFiles;
 
@@ -1010,7 +1015,7 @@ private:
   friend class cmMakefileCall;
 
   std::vector<cmTarget*> ImportedTargetsOwned;
-  std::map<std::string, cmTarget*> ImportedTargets;
+  TargetMap ImportedTargets;
 
   // Internal policy stack management.
   void PushPolicy(bool weak = false,