Introduce the LINK_ONLY generator expression.

This is an internal expression for use by target_link_libraries
for static libraries.

1 files changed, 15 insertions, 1 deletions

diff --git a/Source/cmGeneratorExpressionDAGChecker.cxx b/Source/cmGeneratorExpressionDAGChecker.cxx
index 5b79e35..a4d5453 100644
--- a/Source/cmGeneratorExpressionDAGChecker.cxx
+++ b/Source/cmGeneratorExpressionDAGChecker.cxx
@@ -22,7 +22,7 @@ cmGeneratorExpressionDAGChecker::cmGeneratorExpressionDAGChecker(
                 const GeneratorExpressionContent *content,
                 cmGeneratorExpressionDAGChecker *parent)
   : Parent(parent), Target(target), Property(property),
-    Content(content), Backtrace(backtrace)
+    Content(content), Backtrace(backtrace), TransitivePropertiesOnly(false)
 {
   const cmGeneratorExpressionDAGChecker *top = this;
   const cmGeneratorExpressionDAGChecker *p = this->Parent;
@@ -139,6 +139,20 @@ cmGeneratorExpressionDAGChecker::checkGraph() const
 }
 
 //----------------------------------------------------------------------------
+bool cmGeneratorExpressionDAGChecker::GetTransitivePropertiesOnly()
+{
+  const cmGeneratorExpressionDAGChecker *top = this;
+  const cmGeneratorExpressionDAGChecker *parent = this->Parent;
+  while (parent)
+    {
+    top = parent;
+    parent = parent->Parent;
+    }
+
+  return top->TransitivePropertiesOnly;
+}
+
+//----------------------------------------------------------------------------
 bool cmGeneratorExpressionDAGChecker::EvaluatingLinkLibraries(const char *tgt)
 {
   const cmGeneratorExpressionDAGChecker *top = this;