GetFeature(): return cmProp

Source/cmCommonTargetGenerator.cxx

@@ -41,7 +41,7 @@ std::vector<std::string> const& cmCommonTargetGenerator::GetConfigNames() const
 const char* cmCommonTargetGenerator::GetFeature(const std::string& feature,
                                                 const std::string& config)
 {
-  return this->GeneratorTarget->GetFeature(feature, config);
+  return this->GeneratorTarget->GetFeature(feature, config)->c_str();
 }
 
 void cmCommonTargetGenerator::AddModuleDefinitionFlag(

Source/cmGeneratorTarget.cxx

@@ -815,18 +815,18 @@ void cmGeneratorTarget::ComputeObjectMapping()
   }
 }
 
-const char* cmGeneratorTarget::GetFeature(const std::string& feature,
-                                          const std::string& config) const
+cmProp cmGeneratorTarget::GetFeature(const std::string& feature,
+                                     const std::string& config) const
 {
   if (!config.empty()) {
     std::string featureConfig =
       cmStrCat(feature, '_', cmSystemTools::UpperCase(config));
     if (cmProp value = this->GetProperty(featureConfig)) {
-      return value->c_str();
+      return value;
     }
   }
   if (cmProp value = this->GetProperty(feature)) {
-    return value->c_str();
+    return value;
   }
   return this->LocalGenerator->GetFeature(feature, config);
 }
@@ -853,8 +853,8 @@ const char* cmGeneratorTarget::GetLinkPIEProperty(
 bool cmGeneratorTarget::IsIPOEnabled(std::string const& lang,
                                      std::string const& config) const
 {
-  const char* feature = "INTERPROCEDURAL_OPTIMIZATION";
-  const bool result = cmIsOn(this->GetFeature(feature, config));
+  cmProp feature = this->GetFeature("INTERPROCEDURAL_OPTIMIZATION", config);
+  const bool result = feature && cmIsOn(*feature);
 
   if (!result) {
     // 'INTERPROCEDURAL_OPTIMIZATION' is off, no need to check policies

Source/cmGeneratorTarget.h

@@ -175,8 +175,8 @@ public:
 
   void ComputeObjectMapping();
 
-  const char* GetFeature(const std::string& feature,
-                         const std::string& config) const;
+  cmProp GetFeature(const std::string& feature,
+                    const std::string& config) const;
 
   const char* GetLinkPIEProperty(const std::string& config) const;
 

Source/cmGlobalVisualStudio7Generator.cxx

@@ -694,9 +694,8 @@ std::set<std::string> cmGlobalVisualStudio7Generator::IsPartOfDefaultBuild(
   }
   // inspect EXCLUDE_FROM_DEFAULT_BUILD[_<CONFIG>] properties
   for (std::string const& i : configs) {
-    const char* propertyValue =
-      target->GetFeature("EXCLUDE_FROM_DEFAULT_BUILD", i);
-    if (cmIsOff(propertyValue)) {
+    cmProp propertyValue = target->GetFeature("EXCLUDE_FROM_DEFAULT_BUILD", i);
+    if (!propertyValue || cmIsOff(*propertyValue)) {
       activeConfigs.insert(i);
     }
   }

Source/cmLocalGenerator.cxx

@@ -3253,8 +3253,8 @@ void cmLocalGenerator::AppendFeatureOptions(std::string& flags,
   }
 }
 
-const char* cmLocalGenerator::GetFeature(const std::string& feature,
-                                         const std::string& config)
+cmProp cmLocalGenerator::GetFeature(const std::string& feature,
+                                    const std::string& config)
 {
   std::string featureName = feature;
   // TODO: Define accumulation policy for features (prepend, append,
@@ -3266,7 +3266,7 @@ const char* cmLocalGenerator::GetFeature(const std::string& feature,
   cmStateSnapshot snp = this->StateSnapshot;
   while (snp.IsValid()) {
     if (cmProp value = snp.GetDirectory().GetProperty(featureName)) {
-      return value->c_str();
+      return value;
     }
     snp = snp.GetBuildsystemDirectoryParent();
   }

Source/cmLocalGenerator.h

@@ -20,6 +20,7 @@
 #include "cmMessageType.h"
 #include "cmOutputConverter.h"
 #include "cmPolicies.h"
+#include "cmProperty.h"
 #include "cmStateSnapshot.h"
 
 class cmComputeLinkInformation;
@@ -209,8 +210,7 @@ public:
   void AppendFeatureOptions(std::string& flags, const std::string& lang,
                             const char* feature);
 
-  const char* GetFeature(const std::string& feature,
-                         const std::string& config);
+  cmProp GetFeature(const std::string& feature, const std::string& config);
 
   /** \brief Get absolute path to dependency \a name
    *