Automoc: Add directory-level COMPILE_DEFINITIONS to command line (#14535)

In commit 18412153 (Refactor cmTarget::GetCompileDefinitions...,
2013-06-06) cmQtAutomoc was refactored to get all compile definitions
from the target instead of separately asking the target and querying the
directory-level COMPILE_DEFINITIONS property value.  While the
generation process does integrate directory-level COMPILE_DEFINITIONS
into the target definitions, this did not happen until after Automoc
targets are constructed.  Therefore the commit regressed use of
directory-level definitions in Automoc targets.

Factor the definition finalization logic out from the
cmGlobalGenerator::CreateGeneratorTargets method into a new
cmGlobalGenerator::FinalizeTargetCompileDefinitions method and call it
before constructing Automoc targets.  This will place the
directory-level definitions into the target in time to use them for the
Automoc targets.

Extend the QtAutomoc test to cover this case.

Source/cmGlobalGenerator.cxx

@@ -956,6 +956,8 @@ void cmGlobalGenerator::Generate()
     return;
     }
 
+  this->FinalizeTargetCompileDefinitions();
+
   // Iterate through all targets and set up automoc for those which have
   // the AUTOMOC property set
   this->CreateAutomocTargets();
@@ -1140,13 +1142,11 @@ void cmGlobalGenerator::CreateAutomocTargets()
 }
 
 //----------------------------------------------------------------------------
-void cmGlobalGenerator::CreateGeneratorTargets()
+void cmGlobalGenerator::FinalizeTargetCompileDefinitions()
 {
   // Construct per-target generator information.
   for(unsigned int i=0; i < this->LocalGenerators.size(); ++i)
     {
-    cmGeneratorTargetsType generatorTargets;
-
     cmMakefile *mf = this->LocalGenerators[i]->GetMakefile();
 
     const std::vector<cmValueWithOrigin> noconfig_compile_definitions =
@@ -1161,7 +1161,6 @@ void cmGlobalGenerator::CreateGeneratorTargets()
       {
       cmTarget* t = &ti->second;
 
-      {
       for (std::vector<cmValueWithOrigin>::const_iterator it
                                       = noconfig_compile_definitions.begin();
           it != noconfig_compile_definitions.end(); ++it)
@@ -1178,7 +1177,24 @@ void cmGlobalGenerator::CreateGeneratorTargets()
                           mf->GetProperty(defPropName.c_str()));
         }
       }
+    }
+}
 
+//----------------------------------------------------------------------------
+void cmGlobalGenerator::CreateGeneratorTargets()
+{
+  // Construct per-target generator information.
+  for(unsigned int i=0; i < this->LocalGenerators.size(); ++i)
+    {
+    cmGeneratorTargetsType generatorTargets;
+
+    cmMakefile *mf = this->LocalGenerators[i]->GetMakefile();
+
+    cmTargets& targets = mf->GetTargets();
+    for(cmTargets::iterator ti = targets.begin();
+        ti != targets.end(); ++ti)
+      {
+      cmTarget* t = &ti->second;
       cmGeneratorTarget* gt = new cmGeneratorTarget(t);
       this->GeneratorTargets[t] = gt;
       this->ComputeTargetObjects(gt);

Source/cmGlobalGenerator.h

@@ -382,6 +382,7 @@ private:
 
   void WriteSummary();
   void WriteSummary(cmTarget* target);
+  void FinalizeTargetCompileDefinitions();
 
   cmExternalMakefileProjectGenerator* ExtraGenerator;
 

Tests/QtAutomoc/foo.h

@@ -16,7 +16,10 @@
 
 #include <QObject>
 
-class Foo : public QObject
+class Foo
+#ifdef FOO
+          : public QObject
+#endif
 {
   Q_OBJECT
   public: