Save source dependencies from custom command trace

In each target we trace dependencies among custom commands to pull in
all source files and build rules necessary to complete the target.  This
commit teaches cmTarget to save the inter-source dependencies found
during its analysis.  Later this can be used by generators that need to
topologically order custom command rules.

1 files changed, 4 insertions, 1 deletions

diff --git a/Source/cmTarget.h b/Source/cmTarget.h
index 5054f2d..66cfab0 100644
--- a/Source/cmTarget.h
+++ b/Source/cmTarget.h
@@ -48,6 +48,7 @@ public:
   ~cmTargetInternalPointer();
   cmTargetInternalPointer& operator=(cmTargetInternalPointer const& r);
   cmTargetInternals* operator->() const { return this->Pointer; }
+  cmTargetInternals* Get() const { return this->Pointer; }
 private:
   cmTargetInternals* Pointer;
 };
@@ -122,6 +123,9 @@ public:
   std::vector<cmSourceFile*> const& GetSourceFiles();
   void AddSourceFile(cmSourceFile* sf);
 
+  /** Get sources that must be built before the given source.  */
+  std::vector<cmSourceFile*> const* GetSourceDepends(cmSourceFile* sf);
+
   /**
    * Flags for a given source file as used in this target. Typically assigned
    * via SET_TARGET_PROPERTIES when the property is a list of source files.
@@ -530,7 +534,6 @@ private:
   std::vector<cmCustomCommand> PostBuildCommands;
   TargetType TargetTypeValue;
   std::vector<cmSourceFile*> SourceFiles;
-  std::set<cmSourceFile*> SourceFileSet;
   LinkLibraryVectorType LinkLibraries;
   LinkLibraryVectorType PrevLinkedLibraries;
   bool LinkLibrariesAnalyzed;