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, 9 insertions, 0 deletions

diff --git a/Source/cmInstallCommand.cxx b/Source/cmInstallCommand.cxx
index 0faf1d4..3c76bd6 100644
--- a/Source/cmInstallCommand.cxx
+++ b/Source/cmInstallCommand.cxx
@@ -362,6 +362,15 @@ bool cmInstallCommand::HandleTargetsMode(std::vector<std::string> const& args)
       targetIt!=targetList.GetVector().end();
       ++targetIt)
     {
+
+    if (this->Makefile->IsAlias(targetIt->c_str()))
+      {
+      cmOStringStream e;
+      e << "TARGETS given target \"" << (*targetIt)
+        << "\" which is an alias.";
+      this->SetError(e.str().c_str());
+      return false;
+      }
     // Lookup this target in the current directory.
     if(cmTarget* target=this->Makefile->FindTarget(targetIt->c_str()))
       {