Introduce the LINK_ONLY generator expression.

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

1 files changed, 20 insertions, 0 deletions

diff --git a/Source/cmGeneratorExpressionEvaluator.cxx b/Source/cmGeneratorExpressionEvaluator.cxx
index e2af131..08d9d03 100644
--- a/Source/cmGeneratorExpressionEvaluator.cxx
+++ b/Source/cmGeneratorExpressionEvaluator.cxx
@@ -492,6 +492,24 @@ static const struct VersionEqualNode : public cmGeneratorExpressionNode
 } versionEqualNode;
 
 //----------------------------------------------------------------------------
+static const struct LinkOnlyNode : public cmGeneratorExpressionNode
+{
+  LinkOnlyNode() {}
+
+  std::string Evaluate(const std::vector<std::string> &parameters,
+                       cmGeneratorExpressionContext *,
+                       const GeneratorExpressionContent *,
+                       cmGeneratorExpressionDAGChecker *dagChecker) const
+  {
+    if(!dagChecker->GetTransitivePropertiesOnly())
+      {
+      return parameters.front();
+      }
+    return "";
+  }
+} linkOnlyNode;
+
+//----------------------------------------------------------------------------
 static const struct ConfigurationNode : public cmGeneratorExpressionNode
 {
   ConfigurationNode() {}
@@ -1396,6 +1414,8 @@ cmGeneratorExpressionNode* GetNode(const std::string &identifier)
     return &installPrefixNode;
   else if (identifier == "JOIN")
     return &joinNode;
+  else if (identifier == "LINK_ONLY")
+    return &linkOnlyNode;
   return 0;
 
 }