Consolidate duplicate link rule make dependency code

Factor code previously duplicated for library and executable rules into
a common method.

Source/cmMakefileExecutableTargetGenerator.cxx

@@ -82,34 +82,9 @@ void cmMakefileExecutableTargetGenerator::WriteExecutableRule(bool relink)
 {
   std::vector<std::string> commands;
 
-  std::string relPath = this->LocalGenerator->GetHomeRelativeOutputPath();
-  std::string objTarget;
-
   // Build list of dependencies.
   std::vector<std::string> depends;
-  for(std::vector<std::string>::const_iterator obj = this->Objects.begin();
-      obj != this->Objects.end(); ++obj)
-    {
-    objTarget = relPath;
-    objTarget += *obj;
-    depends.push_back(objTarget);
-    }
-
-  // Add dependencies on targets that must be built first.
-  this->AppendTargetDepends(depends);
-
-  // Add a dependency on the rule file itself.
-  this->LocalGenerator->AppendRuleDepend(depends,
-                                         this->BuildFileNameFull.c_str());
-
-  for(std::vector<std::string>::const_iterator obj =
-        this->ExternalObjects.begin();
-      obj != this->ExternalObjects.end(); ++obj)
-    {
-    depends.push_back(*obj);
-    }
-
-  // from here up is the same for exe or lib
+  this->AppendLinkDepends(depends);
 
   // Get the name of the executable to generate.
   std::string targetName;

Source/cmMakefileLibraryTargetGenerator.cxx

@@ -308,33 +308,10 @@ void cmMakefileLibraryTargetGenerator::WriteLibraryRules
   // code duplication.
   std::vector<std::string> commands;
 
-  std::string relPath = this->LocalGenerator->GetHomeRelativeOutputPath();
-  std::string objTarget;
-
   // Build list of dependencies.
   std::vector<std::string> depends;
-  for(std::vector<std::string>::const_iterator obj = this->Objects.begin();
-      obj != this->Objects.end(); ++obj)
-    {
-    objTarget = relPath;
-    objTarget += *obj;
-    depends.push_back(objTarget);
-    }
+  this->AppendLinkDepends(depends);
 
-  // Add dependencies on targets that must be built first.
-  this->AppendTargetDepends(depends);
-
-  // Add a dependency on the rule file itself.
-  this->LocalGenerator->AppendRuleDepend(depends, 
-                                         this->BuildFileNameFull.c_str());
-  
-  for(std::vector<std::string>::const_iterator obj 
-        = this->ExternalObjects.begin();
-      obj != this->ExternalObjects.end(); ++obj)
-    {
-    depends.push_back(*obj);
-    }
-  
   // Get the language to use for linking this library.
   const char* linkLanguage =
     this->Target->GetLinkerLanguage(this->ConfigName);

Source/cmMakefileTargetGenerator.cxx

@@ -1505,6 +1505,37 @@ void cmMakefileTargetGenerator
     }
 }
 
+//----------------------------------------------------------------------------
+void cmMakefileTargetGenerator
+::AppendLinkDepends(std::vector<std::string>& depends)
+{
+  // Add dependencies on the compiled object files.
+  std::string relPath = this->LocalGenerator->GetHomeRelativeOutputPath();
+  std::string objTarget;
+  for(std::vector<std::string>::const_iterator obj = this->Objects.begin();
+      obj != this->Objects.end(); ++obj)
+    {
+    objTarget = relPath;
+    objTarget += *obj;
+    depends.push_back(objTarget);
+    }
+
+  // Add dependencies on targets that must be built first.
+  this->AppendTargetDepends(depends);
+
+  // Add a dependency on the rule file itself.
+  this->LocalGenerator->AppendRuleDepend(depends,
+                                         this->BuildFileNameFull.c_str());
+
+  // Add dependencies on the external object files.
+  for(std::vector<std::string>::const_iterator obj
+        = this->ExternalObjects.begin();
+      obj != this->ExternalObjects.end(); ++obj)
+    {
+    depends.push_back(*obj);
+    }
+}
+
 //----------------------------------------------------------------------------
 void cmMakefileTargetGenerator
 ::CloseFileStreams()

Source/cmMakefileTargetGenerator.h

@@ -115,6 +115,9 @@ protected:
   // append intertarget dependencies
   void AppendTargetDepends(std::vector<std::string>& depends);
 
+  // Append link rule dependencies (objects, etc.).
+  void AppendLinkDepends(std::vector<std::string>& depends);
+
   /** In order to support parallel builds for custom commands with
       multiple outputs the outputs are given a serial order, and only
       the first output actually has the build rule.  Other outputs