Add $<TARGET_OBJECTS:...> expression to use an object library

For now do not allow an OBJECT library to reference other object
libraries.  Teach cmTarget::ComputeLinkImplementation to include the
languages of object libraries used by a target.

1 files changed, 7 insertions, 0 deletions

diff --git a/Source/cmTarget.h b/Source/cmTarget.h
index e2502f0..d41c827 100644
--- a/Source/cmTarget.h
+++ b/Source/cmTarget.h
@@ -117,6 +117,10 @@ public:
    */
   std::vector<cmSourceFile*> const& GetSourceFiles();
   void AddSourceFile(cmSourceFile* sf);
+  std::vector<std::string> const& GetObjectLibraries() const
+    {
+    return this->ObjectLibraries;
+    }
 
   /** Get sources that must be built before the given source.  */
   std::vector<cmSourceFile*> const* GetSourceDepends(cmSourceFile* sf);
@@ -549,6 +553,7 @@ private:
   std::vector<cmCustomCommand> PostBuildCommands;
   TargetType TargetTypeValue;
   std::vector<cmSourceFile*> SourceFiles;
+  std::vector<std::string> ObjectLibraries;
   LinkLibraryVectorType LinkLibraries;
   LinkLibraryVectorType PrevLinkedLibraries;
   bool LinkLibrariesAnalyzed;
@@ -590,6 +595,8 @@ private:
 
   void MaybeInvalidatePropertyCache(const char* prop);
 
+  void ProcessSourceExpression(std::string const& expr);
+
   // The cmMakefile instance that owns this target.  This should
   // always be set.
   cmMakefile* Makefile;