cmTarget: Add COMPILE_FEATURES target property.

Use the contents of it to upgrade the CXX_STANDARD target property,
if appropriate.  This will have the effect of adding the -std=c++11
compile flag or other language specification on GNU when that is
needed for the feature.

1 files changed, 13 insertions, 0 deletions

diff --git a/Source/cmLocalGenerator.cxx b/Source/cmLocalGenerator.cxx
index 779a2b8..0f8e7dc 100644
--- a/Source/cmLocalGenerator.cxx
+++ b/Source/cmLocalGenerator.cxx
@@ -1459,6 +1459,19 @@ void cmLocalGenerator::AddCompileOptions(
       this->AppendFlagEscape(flags, *i);
       }
     }
+  if (const char* featureProp = target->GetProperty("COMPILE_FEATURES"))
+    {
+    std::vector<std::string> features;
+    cmSystemTools::ExpandListArgument(featureProp, features);
+    for(std::vector<std::string>::const_iterator it = features.begin();
+        it != features.end(); ++it)
+      {
+      if (!this->Makefile->AddRequiredTargetFeature(target, *it))
+        {
+        return;
+        }
+      }
+    }
   this->AddCompilerRequirementFlag(flags, target, lang);
 }