cmTarget: Improve HaveBuildTreeRPATH implementation

Use GetLinkImplementationLibraries instead of GetDirectLinkLibraries
because it tells us whether there will be any libraries to link after
evaluating generator expressions.  Also GetDirectLinkLibraries will be
dropped soon.

1 files changed, 6 insertions, 3 deletions

diff --git a/Source/cmTarget.cxx b/Source/cmTarget.cxx
index 7a63db4..f4a0224 100644
--- a/Source/cmTarget.cxx
+++ b/Source/cmTarget.cxx
@@ -4551,9 +4551,12 @@ bool cmTarget::HaveBuildTreeRPATH(const std::string& config) const
     {
     return false;
     }
-  std::vector<std::string> libs;
-  this->GetDirectLinkLibraries(config, libs);
-  return !libs.empty();
+  if(LinkImplementation const* impl =
+     this->GetLinkImplementationLibraries(config))
+    {
+    return !impl->Libraries.empty();
+    }
+  return false;
 }
 
 //----------------------------------------------------------------------------