Add the ALIAS target concept for libraries and executables.

* The ALIAS name must match a validity regex.
* Executables and libraries may be aliased.
* An ALIAS acts immutable. It can not be used as the lhs
  of target_link_libraries or other commands.
* An ALIAS can be used with add_custom_command, add_custom_target,
  and add_test in the same way regular targets can.
* The target of an ALIAS can be retrieved with the ALIASED_TARGET
  target property.
* An ALIAS does not appear in the generated buildsystem. It
  is kept separate from cmMakefile::Targets for that reason.
* A target may have multiple aliases.
* An ALIAS target may not itself have an alias.
* An IMPORTED target may not have an alias.
* An ALIAS may not be exported or imported.

1 files changed, 6 insertions, 1 deletions

diff --git a/Source/cmGlobalGenerator.h b/Source/cmGlobalGenerator.h
index 2fcdc43..18aba24 100644
--- a/Source/cmGlobalGenerator.h
+++ b/Source/cmGlobalGenerator.h
@@ -196,7 +196,11 @@ public:
   void FindMakeProgram(cmMakefile*);
 
   ///! Find a target by name by searching the local generators.
-  cmTarget* FindTarget(const char* project, const char* name);
+  cmTarget* FindTarget(const char* project, const char* name,
+                       bool excludeAliases = false);
+
+  void AddAlias(const char *name, cmTarget *tgt);
+  bool IsAlias(const char *name);
 
   /** Determine if a name resolves to a framework on disk or a built target
       that is a framework. */
@@ -347,6 +351,7 @@ protected:
 
   // All targets in the entire project.
   std::map<cmStdString,cmTarget *> TotalTargets;
+  std::map<cmStdString,cmTarget *> AliasTargets;
   std::map<cmStdString,cmTarget *> ImportedTargets;
   std::vector<cmGeneratorExpressionEvaluationFile*> EvaluationFiles;