Merge topic 'ninja-no-phony-sources'

93371ed5 Ninja: Skip generating empty phony rules
7243c951 Ninja: Don't limit custom cmd side-effects to build folder (#14972)
a33cf6d0 Ninja: Consider only custom commands deps as side-effects (#14972)

Source/cmGlobalNinjaGenerator.cxx

@@ -151,11 +151,6 @@ void cmGlobalNinjaGenerator::WriteBuild(std::ostream& os,
       ++i)
     {
     arguments += " " + EncodeIdent(EncodePath(*i), os);
-
-    //we need to track every dependency that comes in, since we are trying
-    //to find dependencies that are side effects of build commands
-    //
-    this->CombinedBuildExplicitDependencies.insert( EncodePath(*i) );
     }
 
   // Write implicit dependencies.
@@ -280,6 +275,13 @@ cmGlobalNinjaGenerator::WriteCustomCommandBuild(const std::string& command,
                    cmNinjaDeps(),
                    orderOnly,
                    vars);
+
+  //we need to track every dependency that comes in, since we are trying
+  //to find dependencies that are side effects of build commands
+  for(cmNinjaDeps::const_iterator i = deps.begin(); i != deps.end(); ++i)
+    {
+    this->CombinedCustomCommandExplicitDependencies.insert( EncodePath(*i) );
+    }
 }
 
 void
@@ -1015,43 +1017,33 @@ void cmGlobalNinjaGenerator::WriteUnknownExplicitDependencies(std::ostream& os)
   //to keep this data around
   this->CombinedBuildOutputs.clear();
 
-  //now we difference with CombinedBuildExplicitDependencies to find
+  //now we difference with CombinedCustomCommandExplicitDependencies to find
   //the list of items we know nothing about.
-  //We have encoded all the paths in CombinedBuildExplicitDependencies
+  //We have encoded all the paths in CombinedCustomCommandExplicitDependencies
   //and knownDependencies so no matter if unix or windows paths they
   //should all match now.
 
   std::vector<std::string> unkownExplicitDepends;
-  this->CombinedBuildExplicitDependencies.erase("all");
+  this->CombinedCustomCommandExplicitDependencies.erase("all");
 
-  std::set_difference(this->CombinedBuildExplicitDependencies.begin(),
-                      this->CombinedBuildExplicitDependencies.end(),
+  std::set_difference(this->CombinedCustomCommandExplicitDependencies.begin(),
+                      this->CombinedCustomCommandExplicitDependencies.end(),
                       knownDependencies.begin(),
                       knownDependencies.end(),
                       std::back_inserter(unkownExplicitDepends));
 
 
-  std::string const rootBuildDirectory =
-      this->GetCMakeInstance()->GetHomeOutputDirectory();
   for (std::vector<std::string>::const_iterator
        i = unkownExplicitDepends.begin();
        i != unkownExplicitDepends.end();
        ++i)
     {
-    //verify the file is in the build directory
-    std::string const absDepPath = cmSystemTools::CollapseFullPath(
-                                     i->c_str(), rootBuildDirectory.c_str());
-    bool const inBuildDir = cmSystemTools::IsSubDirectory(absDepPath.c_str(),
-                                                  rootBuildDirectory.c_str());
-    if(inBuildDir)
-      {
-      cmNinjaDeps deps(1,*i);
-      this->WritePhonyBuild(os,
-                            "",
-                            deps,
-                            deps);
-      }
-   }
+    cmNinjaDeps deps(1,*i);
+    this->WritePhonyBuild(os,
+                          "",
+                          deps,
+                          deps);
+    }
 }
 
 void cmGlobalNinjaGenerator::WriteBuiltinTargets(std::ostream& os)

Source/cmGlobalNinjaGenerator.h

@@ -363,10 +363,11 @@ private:
   /// The set of custom command outputs we have seen.
   std::set<std::string> CustomCommandOutputs;
 
-  //The combined explicit dependencies of all build commands that the global
-  //generator has issued. When combined with CombinedBuildOutputs it allows
-  //us to detect the set of explicit dependencies that have
-  std::set<std::string> CombinedBuildExplicitDependencies;
+  /// The combined explicit dependencies of custom build commands
+  std::set<std::string> CombinedCustomCommandExplicitDependencies;
+
+  /// When combined with CombinedCustomCommandExplicitDependencies it allows
+  /// us to detect the set of explicit dependencies that have
   std::set<std::string> CombinedBuildOutputs;
 
   /// The mapping from source file to assumed dependencies.

Source/cmNinjaTargetGenerator.cxx

@@ -542,22 +542,24 @@ cmNinjaTargetGenerator
                    std::back_inserter(orderOnlyDeps), MapToNinjaPath());
     }
 
-  cmNinjaDeps orderOnlyTarget;
-  orderOnlyTarget.push_back(this->OrderDependsTargetForTarget());
-  this->GetGlobalGenerator()->WritePhonyBuild(this->GetBuildFileStream(),
-                                          "Order-only phony target for "
-                                            + this->GetTargetName(),
-                                          orderOnlyTarget,
-                                          cmNinjaDeps(),
-                                          cmNinjaDeps(),
-                                          orderOnlyDeps);
-
+  if (!orderOnlyDeps.empty())
+    {
+    cmNinjaDeps orderOnlyTarget;
+    orderOnlyTarget.push_back(this->OrderDependsTargetForTarget());
+    this->GetGlobalGenerator()->WritePhonyBuild(this->GetBuildFileStream(),
+                                                "Order-only phony target for "
+                                                  + this->GetTargetName(),
+                                                orderOnlyTarget,
+                                                cmNinjaDeps(),
+                                                cmNinjaDeps(),
+                                                orderOnlyDeps);
+    }
   std::vector<cmSourceFile const*> objectSources;
   this->GeneratorTarget->GetObjectSources(objectSources, config);
   for(std::vector<cmSourceFile const*>::const_iterator
         si = objectSources.begin(); si != objectSources.end(); ++si)
     {
-    this->WriteObjectBuildStatement(*si);
+    this->WriteObjectBuildStatement(*si, !orderOnlyDeps.empty());
     }
   std::string def = this->GeneratorTarget->GetModuleDefinitionFile(config);
   if(!def.empty())
@@ -570,7 +572,8 @@ cmNinjaTargetGenerator
 
 void
 cmNinjaTargetGenerator
-::WriteObjectBuildStatement(cmSourceFile const* source)
+::WriteObjectBuildStatement(
+  cmSourceFile const* source, bool writeOrderDependsTargetForTarget)
 {
   std::string comment;
   const std::string language = source->GetLanguage();
@@ -599,7 +602,10 @@ cmNinjaTargetGenerator
   }
 
   cmNinjaDeps orderOnlyDeps;
-  orderOnlyDeps.push_back(this->OrderDependsTargetForTarget());
+  if (writeOrderDependsTargetForTarget)
+    {
+    orderOnlyDeps.push_back(this->OrderDependsTargetForTarget());
+    }
 
   // If the source file is GENERATED and does not have a custom command
   // (either attached to this source file or another one), assume that one of

Source/cmNinjaTargetGenerator.h

@@ -114,7 +114,8 @@ protected:
   void WriteLanguageRules(const std::string& language);
   void WriteCompileRule(const std::string& language);
   void WriteObjectBuildStatements();
-  void WriteObjectBuildStatement(cmSourceFile const* source);
+  void WriteObjectBuildStatement(cmSourceFile const* source,
+                                 bool writeOrderDependsTargetForTarget);
   void WriteCustomCommandBuildStatement(cmCustomCommand *cc);
 
   cmNinjaDeps GetObjects() const