cmTarget: Cache compatible interface property sets

Replace isLinkDependentProperty with a CompatibleInterfaces structure
that records all the compatible interface properties in a set for each
type.  This avoids repeatedly traversing the link implementation closure
and asking every target for its compatible interface properties.

1 files changed, 10 insertions, 0 deletions

diff --git a/Source/cmTarget.h b/Source/cmTarget.h
index 1271272..486315e 100644
--- a/Source/cmTarget.h
+++ b/Source/cmTarget.h
@@ -300,6 +300,16 @@ public:
   std::vector<cmTarget const*> const&
     GetLinkImplementationClosure(const std::string& config) const;
 
+  struct CompatibleInterfaces
+  {
+    std::set<std::string> PropsBool;
+    std::set<std::string> PropsString;
+    std::set<std::string> PropsNumberMax;
+    std::set<std::string> PropsNumberMin;
+  };
+  CompatibleInterfaces const&
+    GetCompatibleInterfaces(std::string const& config) const;
+
   /** The link implementation specifies the direct library
       dependencies needed by the object files of the target.  */
   struct LinkImplementationLibraries