Improve signature of cmLocalGenerator::GetRealDependency

Allow file-level custom command dependencies to be skipped.

Source/cmGlobalXCodeGenerator.cxx

@@ -1334,11 +1334,13 @@ void  cmGlobalXCodeGenerator
           cc.GetDepends().begin();
           d != cc.GetDepends().end(); ++d)
         {
-        std::string dep =
-          this->CurrentLocalGenerator->GetRealDependency(d->c_str(),
-                                                         configName);
-        makefileStream << "\\\n" << this
-          ->ConvertToRelativeForMake(dep.c_str());
+        std::string dep;
+        if(this->CurrentLocalGenerator
+           ->GetRealDependency(d->c_str(), configName, dep))
+          {
+          makefileStream << "\\\n" <<
+            this->ConvertToRelativeForMake(dep.c_str());
+          }
         }
       makefileStream << "\n";
 

Source/cmLocalGenerator.cxx

@@ -1818,8 +1818,9 @@ void cmLocalGenerator::AddLanguageFlags(std::string& flags,
 }
 
 //----------------------------------------------------------------------------
-std::string cmLocalGenerator::GetRealDependency(const char* inName,
-                                                const char* config)
+bool cmLocalGenerator::GetRealDependency(const char* inName,
+                                         const char* config,
+                                         std::string& dep)
 {
   // Older CMake code may specify the dependency using the target
   // output file rather than the target name.  Such code would have
@@ -1855,7 +1856,8 @@ std::string cmLocalGenerator::GetRealDependency(const char* inName,
         // it is a full path to a depend that has the same name
         // as a target but is in a different location so do not use
         // the target as the depend
-        return inName;
+        dep = inName;
+        return true;
         }
       }
     switch (target->GetType())
@@ -1869,7 +1871,8 @@ std::string cmLocalGenerator::GetRealDependency(const char* inName,
         // Get the location of the target's output file and depend on it.
         if(const char* location = target->GetLocation(config))
           {
-          return location;
+          dep = location;
+          return true;
           }
         }
         break;
@@ -1877,7 +1880,8 @@ std::string cmLocalGenerator::GetRealDependency(const char* inName,
       case cmTarget::GLOBAL_TARGET:
         // Depending on a utility target may not work but just trust
         // the user to have given a valid name.
-        return inName;
+        dep = inName;
+        return true;
       case cmTarget::INSTALL_FILES:
       case cmTarget::INSTALL_PROGRAMS:
       case cmTarget::INSTALL_DIRECTORY:
@@ -1889,23 +1893,24 @@ std::string cmLocalGenerator::GetRealDependency(const char* inName,
   if(cmSystemTools::FileIsFullPath(inName))
     {
     // This is a full path.  Return it as given.
-    return inName;
+    dep = inName;
+    return true;
     }
 
   // Check for a source file in this directory that matches the
   // dependency.
   if(cmSourceFile* sf = this->Makefile->GetSource(inName))
     {
-    name = sf->GetFullPath();
-    return name;
+    dep = sf->GetFullPath();
+    return true;
     }
 
   // Treat the name as relative to the source directory in which it
   // was given.
-  name = this->Makefile->GetCurrentDirectory();
-  name += "/";
-  name += inName;
-  return name;
+  dep = this->Makefile->GetCurrentDirectory();
+  dep += "/";
+  dep += inName;
+  return true;
 }
 
 //----------------------------------------------------------------------------

Source/cmLocalGenerator.h

@@ -164,8 +164,9 @@ public:
       Otherwise the name is treated as a relative path with respect to
       the source directory of this generator.  This should only be
       used for dependencies of custom commands.  */
-  std::string GetRealDependency(const char* name, const char* config);
-  
+  bool GetRealDependency(const char* name, const char* config,
+                         std::string& dep);
+
   /** Translate a command as given in CMake code to the location of the 
       executable if the command is the name of a CMake executable target.
       If that's not the case, just return the original name. */

Source/cmLocalUnixMakefileGenerator3.cxx

@@ -902,9 +902,12 @@ cmLocalUnixMakefileGenerator3
       d != cc.GetDepends().end(); ++d)
     {
     // Lookup the real name of the dependency in case it is a CMake target.
-    std::string dep = this->GetRealDependency
-      (d->c_str(), this->ConfigurationName.c_str());
-    depends.push_back(dep);
+    std::string dep;
+    if(this->GetRealDependency(d->c_str(), this->ConfigurationName.c_str(),
+                               dep))
+      {
+      depends.push_back(dep);
+      }
     }
 }
 

Source/cmLocalVisualStudio6Generator.cxx

@@ -686,10 +686,12 @@ cmLocalVisualStudio6Generator
         ++d)
       {
       // Lookup the real name of the dependency in case it is a CMake target.
-      std::string dep = this->GetRealDependency(d->c_str(),
-                                                config.c_str());
-      fout << "\\\n\t" <<
-        this->ConvertToOptionallyRelativeOutputPath(dep.c_str());
+      std::string dep;
+      if(this->GetRealDependency(d->c_str(), config.c_str(), dep))
+        {
+        fout << "\\\n\t" <<
+          this->ConvertToOptionallyRelativeOutputPath(dep.c_str());
+        }
       }
     fout << "\n";
 

Source/cmLocalVisualStudio7Generator.cxx

@@ -1624,9 +1624,12 @@ WriteCustomRule(std::ostream& fout,
           ++d)
         {
         // Get the real name of the dependency in case it is a CMake target.
-        std::string dep = this->GetRealDependency(d->c_str(), i->c_str());
-        fout << this->ConvertToXMLOutputPath(dep.c_str())
-             << ";";
+        std::string dep;
+        if(this->GetRealDependency(d->c_str(), i->c_str(), dep))
+          {
+          fout << this->ConvertToXMLOutputPath(dep.c_str())
+               << ";";
+          }
         }
       }
     fout << "\"\n";

Source/cmVisualStudio10TargetGenerator.cxx

@@ -386,10 +386,12 @@ cmVisualStudio10TargetGenerator::WriteCustomRule(cmSourceFile* source,
         d != command.GetDepends().end(); 
         ++d)
       {
-      std::string dep = this->LocalGenerator->
-        GetRealDependency(d->c_str(), i->c_str());
-      this->ConvertToWindowsSlash(dep);
-      (*this->BuildFileStream ) << ";" << dep;
+      std::string dep;
+      if(this->LocalGenerator->GetRealDependency(d->c_str(), i->c_str(), dep))
+        {
+        this->ConvertToWindowsSlash(dep);
+        (*this->BuildFileStream ) << ";" << dep;
+        }
       }
     (*this->BuildFileStream ) << ";%(AdditionalInputs)</AdditionalInputs>\n";
     this->WritePlatformConfigTag("Outputs", i->c_str(), 3);