cmTarget: Change GetTransitivePropertyLinkLibraries to output targets.

The callers already skip non-targets, so unify the target search.

Change supporting functions to accept a container of targets instead
of strings where possible.

Source/cmGeneratorExpressionEvaluator.cxx

@@ -800,7 +800,7 @@ static const char* targetPropertyTransitiveWhitelist[] = {
 
 #undef TRANSITIVE_PROPERTY_NAME
 
-std::string getLinkedTargetsContent(const std::vector<std::string> &libraries,
+std::string getLinkedTargetsContent(const std::vector<cmTarget*> &targets,
                                   cmTarget const* target,
                                   cmTarget const* headTarget,
                                   cmGeneratorExpressionContext *context,
@@ -811,23 +811,21 @@ std::string getLinkedTargetsContent(const std::vector<std::string> &libraries,
 
   std::string sep;
   std::string depString;
-  for (std::vector<std::string>::const_iterator
-      it = libraries.begin();
-      it != libraries.end(); ++it)
+  for (std::vector<cmTarget*>::const_iterator
+      it = targets.begin();
+      it != targets.end(); ++it)
     {
-    if (*it == target->GetName())
+    if (*it == target)
       {
       // Broken code can have a target in its own link interface.
       // Don't follow such link interface entries so as not to create a
       // self-referencing loop.
       continue;
       }
-    if (context->Makefile->FindTargetToUse(*it))
-      {
-      depString +=
-        sep + "$<TARGET_PROPERTY:" + *it + "," + interfacePropertyName + ">";
-      sep = ";";
-      }
+    depString +=
+      sep + "$<TARGET_PROPERTY:" +
+        (*it)->GetName() + "," + interfacePropertyName + ">";
+    sep = ";";
     }
   cmsys::auto_ptr<cmCompiledGeneratorExpression> cge = ge.Parse(depString);
   std::string linkedTargetsContent = cge->Evaluate(context->Makefile,
@@ -843,6 +841,27 @@ std::string getLinkedTargetsContent(const std::vector<std::string> &libraries,
   return linkedTargetsContent;
 }
 
+std::string getLinkedTargetsContent(const std::vector<std::string> &libraries,
+                                  cmTarget const* target,
+                                  cmTarget const* headTarget,
+                                  cmGeneratorExpressionContext *context,
+                                  cmGeneratorExpressionDAGChecker *dagChecker,
+                                  const std::string &interfacePropertyName)
+{
+  std::vector<cmTarget*> tgts;
+  for (std::vector<std::string>::const_iterator
+      it = libraries.begin();
+      it != libraries.end(); ++it)
+    {
+    if (cmTarget *tgt = context->Makefile->FindTargetToUse(*it))
+      {
+      tgts.push_back(tgt);
+      }
+    }
+  return getLinkedTargetsContent(tgts, target, headTarget, context,
+                                 dagChecker, interfacePropertyName);
+}
+
 //----------------------------------------------------------------------------
 static const struct TargetPropertyNode : public cmGeneratorExpressionNode
 {
@@ -1065,13 +1084,13 @@ static const struct TargetPropertyNode : public cmGeneratorExpressionNode
                      cmStrCmp(propertyName)) != transEnd)
       {
 
-      std::vector<std::string> libs;
-      target->GetTransitivePropertyLinkLibraries(context->Config,
-                                                 headTarget, libs);
-      if (!libs.empty())
+      std::vector<cmTarget*> tgts;
+      target->GetTransitivePropertyTargets(context->Config,
+                                                 headTarget, tgts);
+      if (!tgts.empty())
         {
         linkedTargetsContent =
-                  getLinkedTargetsContent(libs, target,
+                  getLinkedTargetsContent(tgts, target,
                                           headTarget,
                                           context, &dagChecker,
                                           interfacePropertyName);

Source/cmGeneratorTarget.cxx

@@ -63,19 +63,12 @@ cmGeneratorTarget::GetSourceDepends(cmSourceFile* sf) const
   return 0;
 }
 
-static void handleSystemIncludesDep(cmMakefile *mf, const std::string &name,
+static void handleSystemIncludesDep(cmMakefile *mf, cmTarget* depTgt,
                                   const char *config, cmTarget *headTarget,
                                   cmGeneratorExpressionDAGChecker *dagChecker,
                                   std::vector<std::string>& result,
                                   bool excludeImported)
 {
-  cmTarget* depTgt = mf->FindTargetToUse(name);
-
-  if (!depTgt)
-    {
-    return;
-    }
-
   cmListFileBacktrace lfbt;
 
   if (const char* dirs =
@@ -225,26 +218,25 @@ bool cmGeneratorTarget::IsSystemIncludeDirectory(const char *dir,
                                           &dagChecker), result);
       }
 
-    std::set<cmStdString> uniqueDeps;
+    std::set<cmTarget*> uniqueDeps;
     for(std::vector<std::string>::const_iterator li = impl->Libraries.begin();
         li != impl->Libraries.end(); ++li)
       {
-      if (uniqueDeps.insert(*li).second)
+      cmTarget* tgt = this->Makefile->FindTargetToUse(*li);
+      if (!tgt)
         {
-        cmTarget* tgt = this->Makefile->FindTargetToUse(*li);
+        continue;
+        }
 
-        if (!tgt)
-          {
-          continue;
-          }
-
-        handleSystemIncludesDep(this->Makefile, *li, config, this->Target,
+      if (uniqueDeps.insert(tgt).second)
+        {
+        handleSystemIncludesDep(this->Makefile, tgt, config, this->Target,
                                 &dagChecker, result, excludeImported);
 
-        std::vector<std::string> deps;
-        tgt->GetTransitivePropertyLinkLibraries(config, this->Target, deps);
+        std::vector<cmTarget*> deps;
+        tgt->GetTransitivePropertyTargets(config, this->Target, deps);
 
-        for(std::vector<std::string>::const_iterator di = deps.begin();
+        for(std::vector<cmTarget*>::const_iterator di = deps.begin();
             di != deps.end(); ++di)
           {
           if (uniqueDeps.insert(*di).second)

Source/cmTarget.cxx

@@ -5213,10 +5213,9 @@ cmTarget::LinkInterface const* cmTarget::GetLinkInterface(const char* config,
 }
 
 //----------------------------------------------------------------------------
-void cmTarget::GetTransitivePropertyLinkLibraries(
-                                      const char* config,
+void cmTarget::GetTransitivePropertyTargets(const char* config,
                                       cmTarget const* headTarget,
-                                      std::vector<std::string> &libs) const
+                                      std::vector<cmTarget*> &tgts) const
 {
   cmTarget::LinkInterface const* iface = this->GetLinkInterface(config,
                                                                 headTarget);
@@ -5228,7 +5227,15 @@ void cmTarget::GetTransitivePropertyLinkLibraries(
       || this->GetPolicyStatusCMP0022() == cmPolicies::WARN
       || this->GetPolicyStatusCMP0022() == cmPolicies::OLD)
     {
-    libs = iface->Libraries;
+    for(std::vector<std::string>::const_iterator it = iface->Libraries.begin();
+        it != iface->Libraries.end(); ++it)
+      {
+      if (cmTarget* tgt = headTarget->GetMakefile()
+                                    ->FindTargetToUse(it->c_str()))
+        {
+        tgts.push_back(tgt);
+        }
+      }
     return;
     }
 
@@ -5246,12 +5253,23 @@ void cmTarget::GetTransitivePropertyLinkLibraries(
   cmGeneratorExpressionDAGChecker dagChecker(lfbt, this->GetName(),
                                               linkIfaceProp, 0, 0);
   dagChecker.SetTransitivePropertiesOnly();
+  std::vector<std::string> libs;
   cmSystemTools::ExpandListArgument(ge.Parse(interfaceLibs)->Evaluate(
                                       this->Makefile,
                                       config,
                                       false,
                                       headTarget,
                                       this, &dagChecker), libs);
+
+  for(std::vector<std::string>::const_iterator it = libs.begin();
+      it != libs.end(); ++it)
+    {
+    if (cmTarget* tgt = headTarget->GetMakefile()
+                                  ->FindTargetToUse(it->c_str()))
+      {
+      tgts.push_back(tgt);
+      }
+    }
 }
 
 //----------------------------------------------------------------------------

Source/cmTarget.h

@@ -264,9 +264,9 @@ public:
       if the target cannot be linked.  */
   LinkInterface const* GetLinkInterface(const char* config,
                                         cmTarget const* headTarget) const;
-  void GetTransitivePropertyLinkLibraries(const char* config,
+  void GetTransitivePropertyTargets(const char* config,
                                         cmTarget const* headTarget,
-                                        std::vector<std::string> &libs) const;
+                                        std::vector<cmTarget*> &libs) const;
 
   /** The link implementation specifies the direct library
       dependencies needed by the object files of the target.  */