Don't keep track of content determined by target property values.

This tracking was added during the development of commit 042ecf04
(Add API to calculate link-interface-dependent bool properties
or error., 2013-01-06), but was never used.

It was not necessary to use the content because what is really
useful in that logic is to determine if a property has been implied
to be null by appearing in a LINK_LIBRARIES genex.

I think the motivating usecase for developing the feature of
keeping track of the targets relevant to a property was that I
thought it would  make it possible to allow requiring granular
compatibility of interface properties only for targets which
depended on the interface property. Eg:

 add_library(foo ...)
 add_library(bar ...)

 add_executable(user ...)
 # Read the INTERFACE_POSITION_INDEPENDENT_CODE from bar, but not
 # from foo:
 target_link_libraries(user foo $<$<TARGET_PROPERTY:POSTITION_INDEPENDENT_CODE>:bar>)

This obviously doesn't make sense. We require that INTERFACE
properties are consistent across all linked targets instead.

1 files changed, 0 insertions, 7 deletions

diff --git a/Source/cmTarget.h b/Source/cmTarget.h
index 7577a59..fb1496f 100644
--- a/Source/cmTarget.h
+++ b/Source/cmTarget.h
@@ -498,17 +498,12 @@ public:
 
   void AppendBuildInterfaceIncludes();
 
-  void GetLinkDependentTargetsForProperty(const std::string &p,
-                                       std::set<std::string> &targets);
   bool IsNullImpliedByLinkLibraries(const std::string &p);
   bool IsLinkInterfaceDependentBoolProperty(const std::string &p,
                                             const char *config);
   bool IsLinkInterfaceDependentStringProperty(const std::string &p,
                                               const char *config);
 
-  void AddLinkDependentTargetsForProperties(
-          const std::map<cmStdString, cmStdString> &map);
-
   bool GetLinkInterfaceDependentBoolProperty(const std::string &p,
                                              const char *config);
 
@@ -627,8 +622,6 @@ private:
   bool IsApple;
   bool IsImportedTarget;
   bool DebugIncludesDone;
-  mutable std::map<cmStdString, std::set<std::string> >
-                                                      LinkDependentProperties;
   mutable std::set<std::string> LinkImplicitNullProperties;
   bool BuildInterfaceIncludesAppended;