ENH: make sure depend helper actually works, if a depend library gets updated, then the target needs to be removed, and the CONFIGURATION directory needs to be used

Source/cmGlobalXCodeGenerator.cxx

@@ -386,6 +386,7 @@ void cmGlobalXCodeGenerator::CreateReRunCMakeFile(cmLocalGenerator* root)
   cmSystemTools::MakeDirectory(m_CurrentReRunCMakeMakefile.c_str());
   m_CurrentReRunCMakeMakefile += "/ReRunCMake.make";
   cmGeneratedFileStream makefileStream(m_CurrentReRunCMakeMakefile.c_str());
+  makefileStream.SetCopyIfDifferent(true);
   makefileStream << "# Generated by CMake, DO NOT EDIT\n";
   makefileStream << "CMakeFiles/cmake.check_cache: ";
   for(std::vector<std::string>::const_iterator i = lfiles.begin();
@@ -845,6 +846,7 @@ cmGlobalXCodeGenerator::AddCommandsToBuildPhase(cmXCodeObject* buildphase,
     {
     return;
     }
+  makefileStream.SetCopyIfDifferent(true);
   makefileStream << "# Generated by CMake, DO NOT EDIT\n";
   makefileStream << "# Custom rules for " << target.GetName() << "\n";
   
@@ -1968,7 +1970,7 @@ cmGlobalXCodeGenerator::CreateXCodeDependHackTarget(
                          m_CurrentXCodeHackMakefile.c_str());
     return;
     }
-  
+  makefileStream.SetCopyIfDifferent(true);
   // one more pass for external depend information not handled
   // correctly by xcode
   makefileStream << "# DO NOT EDIT\n";
@@ -1986,8 +1988,8 @@ cmGlobalXCodeGenerator::CreateXCodeDependHackTarget(
        t->GetType() == cmTarget::MODULE_LIBRARY)
       {
       makefileStream << "\\\n\t"
-                     << this->
+                     << this->AddConfigDir(this->
-        ConvertToRelativeForMake(this->GetTargetFullPath(target->GetcmTarget()).c_str());
+                                           ConvertToRelativeForMake(this->GetTargetFullPath(target->GetcmTarget()).c_str()).c_str());
       }
     }
   makefileStream << "\n\n"; 
@@ -2005,7 +2007,9 @@ cmGlobalXCodeGenerator::CreateXCodeDependHackTarget(
       {
       if(emitted.insert(*d).second)
         {
-        makefileStream << this->ConvertToRelativeForMake(d->c_str()) << ":\n";
+        makefileStream << 
+          this->AddConfigDir(this->ConvertToRelativeForMake(d->c_str()).c_str())
+                       << ":\n";
         }
       }
     }
@@ -2026,20 +2030,49 @@ cmGlobalXCodeGenerator::CreateXCodeDependHackTarget(
       {
       std::vector<cmStdString> const& deplibs = target->GetDependLibraries();
       std::string tfull = this->GetTargetFullPath(target->GetcmTarget());
-      makefileStream << this->ConvertToRelativeForMake(tfull.c_str()) << ": ";
+      makefileStream << this->AddConfigDir(
+        this->ConvertToRelativeForMake(tfull.c_str()).c_str()) << ": ";
       for(std::vector<cmStdString>::const_iterator d = deplibs.begin();
           d != deplibs.end(); ++d)
         {
-        makefileStream << "\\\n\t" << this->ConvertToRelativeForMake(d->c_str());
+        makefileStream << "\\\n\t" << 
+          this->AddConfigDir(
+            this->ConvertToRelativeForMake(d->c_str()).c_str());
         }
       makefileStream << "\n";
       makefileStream << "\t/bin/rm -f "
-                     << this->ConvertToRelativeForMake(tfull.c_str()) << "\n";
+                     << 
+        this->AddConfigDir(
+          this->ConvertToRelativeForMake(tfull.c_str()).c_str())
+                     << "\n";
       makefileStream << "\n\n";
       }
     }
 }
 
+//----------------------------------------------------------------------------
+std::string
+cmGlobalXCodeGenerator::AddConfigDir(const char* d)
+{
+  if(m_XcodeVersion == 15)
+    {
+    return std::string(d);
+    }
+  std::string dir = d;
+  if(cmSystemTools::FileExists(d))
+    {
+    return dir;
+    }
+  std::string::size_type pos = dir.rfind("/");
+  if(pos == dir.npos)
+    {
+    return dir;
+    }
+  std::string ret = dir.substr(0, pos);
+  ret += "/${CONFIGURATION}";
+  ret += dir.substr(pos);
+  return ret;
+}
 //----------------------------------------------------------------------------
 void
 cmGlobalXCodeGenerator::OutputXCodeProject(cmLocalGenerator* root,

Source/cmGlobalXCodeGenerator.h

@@ -142,6 +142,8 @@ private:
                                   const std::vector<cmCustomCommand>&);
   void CreateReRunCMakeFile(cmLocalGenerator* root);
 protected:
+  std::string AddConfigDir(const char* d);
+
   int m_XcodeVersion;
   std::vector<cmXCodeObject*> m_XCodeObjects;
   cmXCodeObject* m_RootObject;