cmState::GetGlobalProperty: return cmProp

19 files changed, 95 insertions, 83 deletions

diff --git a/Source/CTest/cmCTestSubmitHandler.cxx b/Source/CTest/cmCTestSubmitHandler.cxx
index 22ab48f..cfa5817 100644
--- a/Source/CTest/cmCTestSubmitHandler.cxx
+++ b/Source/CTest/cmCTestSubmitHandler.cxx
@@ -260,11 +260,10 @@ bool cmCTestSubmitHandler::SubmitUsingHTTP(
         cmCTestScriptHandler* ch = this->CTest->GetScriptHandler();
         cmake* cm = ch->GetCMake();
         if (cm) {
-          const char* subproject =
-            cm->GetState()->GetGlobalProperty("SubProject");
+          cmProp subproject = cm->GetState()->GetGlobalProperty("SubProject");
           if (subproject) {
             upload_as += "&subproject=";
-            upload_as += ctest_curl.Escape(subproject);
+            upload_as += ctest_curl.Escape(*subproject);
           }
         }
       }
@@ -555,11 +554,11 @@ int cmCTestSubmitHandler::HandleCDashUploadFile(std::string const& file,
   // a "&subproject=subprojectname" to the first POST.
   cmCTestScriptHandler* ch = this->CTest->GetScriptHandler();
   cmake* cm = ch->GetCMake();
-  const char* subproject = cm->GetState()->GetGlobalProperty("SubProject");
+  cmProp subproject = cm->GetState()->GetGlobalProperty("SubProject");
   // TODO: Encode values for a URL instead of trusting caller.
   std::ostringstream str;
   if (subproject) {
-    str << "subproject=" << curl.Escape(subproject) << "&";
+    str << "subproject=" << curl.Escape(*subproject) << "&";
   }
   auto timeNow =
     std::chrono::system_clock::to_time_t(std::chrono::system_clock::now());
diff --git a/Source/cmCTest.cxx b/Source/cmCTest.cxx
index fb100b1..86816db 100644
--- a/Source/cmCTest.cxx
+++ b/Source/cmCTest.cxx
@@ -1439,16 +1439,15 @@ void cmCTest::AddSiteProperties(cmXMLWriter& xml)
     return;
   }
   // This code should go when cdash is changed to use labels only
-  const char* subproject = cm->GetState()->GetGlobalProperty("SubProject");
+  cmProp subproject = cm->GetState()->GetGlobalProperty("SubProject");
   if (subproject) {
     xml.StartElement("Subproject");
-    xml.Attribute("name", subproject);
-    const char* labels =
+    xml.Attribute("name", *subproject);
+    cmProp labels =
       ch->GetCMake()->GetState()->GetGlobalProperty("SubProjectLabels");
     if (labels) {
       xml.StartElement("Labels");
-      std::string l = labels;
-      std::vector<std::string> args = cmExpandedList(l);
+      std::vector<std::string> args = cmExpandedList(*labels);
       for (std::string const& i : args) {
         xml.Element("Label", i);
       }
@@ -1458,10 +1457,10 @@ void cmCTest::AddSiteProperties(cmXMLWriter& xml)
   }
 
   // This code should stay when cdash only does label based sub-projects
-  const char* label = cm->GetState()->GetGlobalProperty("Label");
+  cmProp label = cm->GetState()->GetGlobalProperty("Label");
   if (label) {
     xml.StartElement("Labels");
-    xml.Element("Label", label);
+    xml.Element("Label", *label);
     xml.EndElement();
   }
 }
diff --git a/Source/cmExtraEclipseCDT4Generator.cxx b/Source/cmExtraEclipseCDT4Generator.cxx
index 8ab30c0..1b1b644 100644
--- a/Source/cmExtraEclipseCDT4Generator.cxx
+++ b/Source/cmExtraEclipseCDT4Generator.cxx
@@ -415,9 +415,9 @@ void cmExtraEclipseCDT4Generator::CreateProjectFile()
     xml.Element("nature", n);
   }
 
-  if (const char* extraNaturesProp =
+  if (cmProp extraNaturesProp =
         mf->GetState()->GetGlobalProperty("ECLIPSE_EXTRA_NATURES")) {
-    std::vector<std::string> extraNatures = cmExpandedList(extraNaturesProp);
+    std::vector<std::string> extraNatures = cmExpandedList(*extraNaturesProp);
     for (std::string const& n : extraNatures) {
       xml.Element("nature", n);
     }
@@ -1033,9 +1033,9 @@ void cmExtraEclipseCDT4Generator::CreateCProjectFile() const
   xml.EndElement(); // storageModule
 
   // Append additional cproject contents without applying any XML formatting
-  if (const char* extraCProjectContents =
+  if (cmProp extraCProjectContents =
         mf->GetState()->GetGlobalProperty("ECLIPSE_EXTRA_CPROJECT_CONTENTS")) {
-    fout << extraCProjectContents;
+    fout << *extraCProjectContents;
   }
 
   xml.EndElement(); // cproject
diff --git a/Source/cmFindPackageCommand.cxx b/Source/cmFindPackageCommand.cxx
index f606002..e996327 100644
--- a/Source/cmFindPackageCommand.cxx
+++ b/Source/cmFindPackageCommand.cxx
@@ -1114,12 +1114,10 @@ bool cmFindPackageCommand::ReadListFile(const std::string& f,
 void cmFindPackageCommand::AppendToFoundProperty(bool found)
 {
   std::vector<std::string> foundContents;
-  const char* foundProp =
+  cmProp foundProp =
     this->Makefile->GetState()->GetGlobalProperty("PACKAGES_FOUND");
-  if (foundProp && *foundProp) {
-    std::string tmp = foundProp;
-
-    cmExpandList(tmp, foundContents, false);
+  if (foundProp && !foundProp->empty()) {
+    cmExpandList(*foundProp, foundContents, false);
     auto nameIt =
       std::find(foundContents.begin(), foundContents.end(), this->Name);
     if (nameIt != foundContents.end()) {
@@ -1128,12 +1126,10 @@ void cmFindPackageCommand::AppendToFoundProperty(bool found)
   }
 
   std::vector<std::string> notFoundContents;
-  const char* notFoundProp =
+  cmProp notFoundProp =
     this->Makefile->GetState()->GetGlobalProperty("PACKAGES_NOT_FOUND");
-  if (notFoundProp && *notFoundProp) {
-    std::string tmp = notFoundProp;
-
-    cmExpandList(tmp, notFoundContents, false);
+  if (notFoundProp && !notFoundProp->empty()) {
+    cmExpandList(*notFoundProp, notFoundContents, false);
     auto nameIt =
       std::find(notFoundContents.begin(), notFoundContents.end(), this->Name);
     if (nameIt != notFoundContents.end()) {
diff --git a/Source/cmGetCMakePropertyCommand.cxx b/Source/cmGetCMakePropertyCommand.cxx
index ff4e312..4a9509b 100644
--- a/Source/cmGetCMakePropertyCommand.cxx
+++ b/Source/cmGetCMakePropertyCommand.cxx
@@ -36,12 +36,12 @@ bool cmGetCMakePropertyCommand(std::vector<std::string> const& args,
       status.GetMakefile().GetGlobalGenerator()->GetInstallComponents();
     output = cmJoin(*components, ";");
   } else {
-    const char* prop = nullptr;
+    cmProp prop = nullptr;
     if (!args[1].empty()) {
       prop = status.GetMakefile().GetState()->GetGlobalProperty(args[1]);
     }
     if (prop) {
-      output = prop;
+      output = *prop;
     }
   }
 
diff --git a/Source/cmGetPropertyCommand.cxx b/Source/cmGetPropertyCommand.cxx
index 947d893..5e034a4 100644
--- a/Source/cmGetPropertyCommand.cxx
+++ b/Source/cmGetPropertyCommand.cxx
@@ -241,8 +241,9 @@ bool HandleGlobalMode(cmExecutionStatus& status, const std::string& name,
 
   // Get the property.
   cmake* cm = status.GetMakefile().GetCMakeInstance();
+  cmProp p = cm->GetState()->GetGlobalProperty(propertyName);
   return StoreResult(infoType, status.GetMakefile(), variable,
-                     cm->GetState()->GetGlobalProperty(propertyName));
+                     p ? p->c_str() : nullptr);
 }
 
 bool HandleDirectoryMode(cmExecutionStatus& status, const std::string& name,
diff --git a/Source/cmGlobalGenerator.cxx b/Source/cmGlobalGenerator.cxx
index 0e10734..6d08369 100644
--- a/Source/cmGlobalGenerator.cxx
+++ b/Source/cmGlobalGenerator.cxx
@@ -246,11 +246,10 @@ void cmGlobalGenerator::ResolveLanguageCompiler(const std::string& lang,
     cmSystemTools::ConvertToUnixSlashes(cnameString);
     cmSystemTools::ConvertToUnixSlashes(pathString);
     if (cnameString != pathString) {
-      const char* cvars =
-        this->GetCMakeInstance()->GetState()->GetGlobalProperty(
-          "__CMAKE_DELETE_CACHE_CHANGE_VARS_");
+      cmProp cvars = this->GetCMakeInstance()->GetState()->GetGlobalProperty(
+        "__CMAKE_DELETE_CACHE_CHANGE_VARS_");
       if (cvars) {
-        changeVars += cvars;
+        changeVars += *cvars;
         changeVars += ";";
       }
       changeVars += langComp;
@@ -2674,13 +2673,13 @@ void cmGlobalGenerator::AddGlobalTarget_Install(
   }
 }
 
-const char* cmGlobalGenerator::GetPredefinedTargetsFolder()
+std::string cmGlobalGenerator::GetPredefinedTargetsFolder()
 {
-  const char* prop = this->GetCMakeInstance()->GetState()->GetGlobalProperty(
+  cmProp prop = this->GetCMakeInstance()->GetState()->GetGlobalProperty(
     "PREDEFINED_TARGETS_FOLDER");
 
   if (prop) {
-    return prop;
+    return *prop;
   }
 
   return "CMakePredefinedTargets";
@@ -2688,13 +2687,13 @@ const char* cmGlobalGenerator::GetPredefinedTargetsFolder()
 
 bool cmGlobalGenerator::UseFolderProperty() const
 {
-  const char* prop =
+  cmProp prop =
     this->GetCMakeInstance()->GetState()->GetGlobalProperty("USE_FOLDERS");
 
   // If this property is defined, let the setter turn this on or off...
   //
   if (prop) {
-    return cmIsOn(prop);
+    return cmIsOn(*prop);
   }
 
   // By default, this feature is OFF, since it is not supported in the
diff --git a/Source/cmGlobalGenerator.h b/Source/cmGlobalGenerator.h
index 7dc4822..70e43b5 100644
--- a/Source/cmGlobalGenerator.h
+++ b/Source/cmGlobalGenerator.h
@@ -588,7 +588,7 @@ protected:
 
   cmGeneratorTarget* FindGeneratorTargetImpl(std::string const& name) const;
 
-  const char* GetPredefinedTargetsFolder();
+  std::string GetPredefinedTargetsFolder();
 
 private:
   using TargetMap = std::unordered_map<std::string, cmTarget*>;
diff --git a/Source/cmGlobalUnixMakefileGenerator3.cxx b/Source/cmGlobalUnixMakefileGenerator3.cxx
index 7daca74..336bfc6 100644
--- a/Source/cmGlobalUnixMakefileGenerator3.cxx
+++ b/Source/cmGlobalUnixMakefileGenerator3.cxx
@@ -674,10 +674,10 @@ void cmGlobalUnixMakefileGenerator3::WriteConvenienceRules2(
       }
 
       bool targetMessages = true;
-      if (const char* tgtMsg =
+      if (cmProp tgtMsg =
             this->GetCMakeInstance()->GetState()->GetGlobalProperty(
               "TARGET_MESSAGES")) {
-        targetMessages = cmIsOn(tgtMsg);
+        targetMessages = cmIsOn(*tgtMsg);
       }
 
       if (targetMessages) {
diff --git a/Source/cmGlobalXCodeGenerator.cxx b/Source/cmGlobalXCodeGenerator.cxx
index 9db4817..a672459 100644
--- a/Source/cmGlobalXCodeGenerator.cxx
+++ b/Source/cmGlobalXCodeGenerator.cxx
@@ -3695,15 +3695,14 @@ bool cmGlobalXCodeGenerator::HasKnownObjectFileLocation(
 
 bool cmGlobalXCodeGenerator::UseEffectivePlatformName(cmMakefile* mf) const
 {
-  const char* epnValue =
-    this->GetCMakeInstance()->GetState()->GetGlobalProperty(
-      "XCODE_EMIT_EFFECTIVE_PLATFORM_NAME");
+  cmProp epnValue = this->GetCMakeInstance()->GetState()->GetGlobalProperty(
+    "XCODE_EMIT_EFFECTIVE_PLATFORM_NAME");
 
   if (!epnValue) {
     return mf->PlatformIsAppleEmbedded();
   }
 
-  return cmIsOn(epnValue);
+  return cmIsOn(*epnValue);
 }
 
 bool cmGlobalXCodeGenerator::ShouldStripResourcePath(cmMakefile*) const
diff --git a/Source/cmLocalNinjaGenerator.cxx b/Source/cmLocalNinjaGenerator.cxx
index be1dd0d..248b3f1 100644
--- a/Source/cmLocalNinjaGenerator.cxx
+++ b/Source/cmLocalNinjaGenerator.cxx
@@ -251,15 +251,15 @@ void cmLocalNinjaGenerator::WritePools(std::ostream& os)
 {
   cmGlobalNinjaGenerator::WriteDivider(os);
 
-  const char* jobpools =
+  cmProp jobpools =
     this->GetCMakeInstance()->GetState()->GetGlobalProperty("JOB_POOLS");
   if (!jobpools) {
-    jobpools = this->GetMakefile()->GetDefinition("CMAKE_JOB_POOLS");
+    jobpools = this->GetMakefile()->GetDef("CMAKE_JOB_POOLS");
   }
   if (jobpools) {
     cmGlobalNinjaGenerator::WriteComment(
       os, "Pools defined by global property JOB_POOLS");
-    std::vector<std::string> pools = cmExpandedList(jobpools);
+    std::vector<std::string> pools = cmExpandedList(*jobpools);
     for (std::string const& pool : pools) {
       const std::string::size_type eq = pool.find('=');
       unsigned int jobs;
diff --git a/Source/cmMakefileTargetGenerator.cxx b/Source/cmMakefileTargetGenerator.cxx
index 451f19e..428dc8e 100644
--- a/Source/cmMakefileTargetGenerator.cxx
+++ b/Source/cmMakefileTargetGenerator.cxx
@@ -46,9 +46,8 @@ cmMakefileTargetGenerator::cmMakefileTargetGenerator(cmGeneratorTarget* target)
     this->LocalGenerator->GetGlobalGenerator());
   cmake* cm = this->GlobalGenerator->GetCMakeInstance();
   this->NoRuleMessages = false;
-  if (const char* ruleStatus =
-        cm->GetState()->GetGlobalProperty("RULE_MESSAGES")) {
-    this->NoRuleMessages = cmIsOff(ruleStatus);
+  if (cmProp ruleStatus = cm->GetState()->GetGlobalProperty("RULE_MESSAGES")) {
+    this->NoRuleMessages = cmIsOff(*ruleStatus);
   }
   MacOSXContentGenerator = cm::make_unique<MacOSXContentGeneratorType>(this);
 }
diff --git a/Source/cmQtAutoGenGlobalInitializer.cxx b/Source/cmQtAutoGenGlobalInitializer.cxx
index 7a6cb42..18b135d 100644
--- a/Source/cmQtAutoGenGlobalInitializer.cxx
+++ b/Source/cmQtAutoGenGlobalInitializer.cxx
@@ -164,10 +164,10 @@ void cmQtAutoGenGlobalInitializer::GetOrCreateGlobalTarget(
 
     // Set FOLDER property in the target
     {
-      char const* folder =
+      cmProp folder =
         makefile->GetState()->GetGlobalProperty("AUTOGEN_TARGETS_FOLDER");
       if (folder != nullptr) {
-        target->SetProperty("FOLDER", folder);
+        target->SetProperty("FOLDER", *folder);
       }
     }
   }
diff --git a/Source/cmQtAutoGenInitializer.cxx b/Source/cmQtAutoGenInitializer.cxx
index 629367d..dddba0a 100644
--- a/Source/cmQtAutoGenInitializer.cxx
+++ b/Source/cmQtAutoGenInitializer.cxx
@@ -339,15 +339,18 @@ bool cmQtAutoGenInitializer::InitCustomTargets()
 
   // Targets FOLDER
   {
-    const char* folder =
+    cmProp prop =
       this->Makefile->GetState()->GetGlobalProperty("AUTOMOC_TARGETS_FOLDER");
-    if (folder == nullptr) {
-      folder = this->Makefile->GetState()->GetGlobalProperty(
+    if (prop == nullptr) {
+      prop = this->Makefile->GetState()->GetGlobalProperty(
         "AUTOGEN_TARGETS_FOLDER");
     }
+    const char* folder;
     // Inherit FOLDER property from target (#13688)
-    if (folder == nullptr) {
+    if (prop == nullptr) {
       folder = this->GenTarget->GetProperty("FOLDER");
+    } else {
+      folder = prop->c_str();
     }
     if (folder != nullptr) {
       this->TargetsFolder = folder;
@@ -1604,10 +1607,9 @@ void cmQtAutoGenInitializer::AddToSourceGroup(std::string const& fileName,
         cmStrCat(genNameUpper, "_SOURCE_GROUP"), "AUTOGEN_SOURCE_GROUP"
       };
       for (std::string const& prop : props) {
-        const char* propName =
-          this->Makefile->GetState()->GetGlobalProperty(prop);
-        if ((propName != nullptr) && (*propName != '\0')) {
-          groupName = propName;
+        cmProp propName = this->Makefile->GetState()->GetGlobalProperty(prop);
+        if (propName && !propName->empty()) {
+          groupName = *propName;
           property = prop;
           break;
         }
diff --git a/Source/cmState.cxx b/Source/cmState.cxx
index b1fa772..1ba1d10 100644
--- a/Source/cmState.cxx
+++ b/Source/cmState.cxx
@@ -573,7 +573,7 @@ void cmState::AppendGlobalProperty(const std::string& prop,
   this->GlobalProperties.AppendProperty(prop, value, asString);
 }
 
-const char* cmState::GetGlobalProperty(const std::string& prop)
+cmProp cmState::GetGlobalProperty(const std::string& prop)
 {
   if (prop == "CACHE_VARIABLES") {
     std::vector<std::string> cacheKeys = this->GetCacheEntryKeys();
@@ -597,41 +597,59 @@ const char* cmState::GetGlobalProperty(const std::string& prop)
   }
 #define STRING_LIST_ELEMENT(F) ";" #F
   if (prop == "CMAKE_C_KNOWN_FEATURES") {
-    return &FOR_EACH_C_FEATURE(STRING_LIST_ELEMENT)[1];
+    static const std::string s_out(
+      &FOR_EACH_C_FEATURE(STRING_LIST_ELEMENT)[1]);
+    return &s_out;
   }
   if (prop == "CMAKE_C90_KNOWN_FEATURES") {
-    return &FOR_EACH_C90_FEATURE(STRING_LIST_ELEMENT)[1];
+    static const std::string s_out(
+      &FOR_EACH_C90_FEATURE(STRING_LIST_ELEMENT)[1]);
+    return &s_out;
   }
   if (prop == "CMAKE_C99_KNOWN_FEATURES") {
-    return &FOR_EACH_C99_FEATURE(STRING_LIST_ELEMENT)[1];
+    static const std::string s_out(
+      &FOR_EACH_C99_FEATURE(STRING_LIST_ELEMENT)[1]);
+    return &s_out;
   }
   if (prop == "CMAKE_C11_KNOWN_FEATURES") {
-    return &FOR_EACH_C11_FEATURE(STRING_LIST_ELEMENT)[1];
+    static const std::string s_out(
+      &FOR_EACH_C11_FEATURE(STRING_LIST_ELEMENT)[1]);
+    return &s_out;
   }
   if (prop == "CMAKE_CXX_KNOWN_FEATURES") {
-    return &FOR_EACH_CXX_FEATURE(STRING_LIST_ELEMENT)[1];
+    static const std::string s_out(
+      &FOR_EACH_CXX_FEATURE(STRING_LIST_ELEMENT)[1]);
+    return &s_out;
   }
   if (prop == "CMAKE_CXX98_KNOWN_FEATURES") {
-    return &FOR_EACH_CXX98_FEATURE(STRING_LIST_ELEMENT)[1];
+    static const std::string s_out(
+      &FOR_EACH_CXX98_FEATURE(STRING_LIST_ELEMENT)[1]);
+    return &s_out;
   }
   if (prop == "CMAKE_CXX11_KNOWN_FEATURES") {
-    return &FOR_EACH_CXX11_FEATURE(STRING_LIST_ELEMENT)[1];
+    static const std::string s_out(
+      &FOR_EACH_CXX11_FEATURE(STRING_LIST_ELEMENT)[1]);
+    return &s_out;
   }
   if (prop == "CMAKE_CXX14_KNOWN_FEATURES") {
-    return &FOR_EACH_CXX14_FEATURE(STRING_LIST_ELEMENT)[1];
+    static const std::string s_out(
+      &FOR_EACH_CXX14_FEATURE(STRING_LIST_ELEMENT)[1]);
+    return &s_out;
   }
   if (prop == "CMAKE_CUDA_KNOWN_FEATURES") {
-    return &FOR_EACH_CUDA_FEATURE(STRING_LIST_ELEMENT)[1];
+    static const std::string s_out(
+      &FOR_EACH_CUDA_FEATURE(STRING_LIST_ELEMENT)[1]);
+    return &s_out;
   }
 
 #undef STRING_LIST_ELEMENT
-  cmProp retVal = this->GlobalProperties.GetPropertyValue(prop);
-  return retVal ? retVal->c_str() : nullptr;
+  return this->GlobalProperties.GetPropertyValue(prop);
 }
 
 bool cmState::GetGlobalPropertyAsBool(const std::string& prop)
 {
-  return cmIsOn(this->GetGlobalProperty(prop));
+  cmProp p = this->GetGlobalProperty(prop);
+  return p && cmIsOn(*p);
 }
 
 void cmState::SetSourceDirectory(std::string const& sourceDirectory)
diff --git a/Source/cmState.h b/Source/cmState.h
index b577a72..8d6bd7b 100644
--- a/Source/cmState.h
+++ b/Source/cmState.h
@@ -173,7 +173,7 @@ public:
   void SetGlobalProperty(const std::string& prop, const char* value);
   void AppendGlobalProperty(const std::string& prop, const std::string& value,
                             bool asString = false);
-  const char* GetGlobalProperty(const std::string& prop);
+  cmProp GetGlobalProperty(const std::string& prop);
   bool GetGlobalPropertyAsBool(const std::string& prop);
 
   std::string const& GetSourceDirectory() const;
diff --git a/Source/cmStateDirectory.cxx b/Source/cmStateDirectory.cxx
index e7de3c7..2ce7530 100644
--- a/Source/cmStateDirectory.cxx
+++ b/Source/cmStateDirectory.cxx
@@ -641,7 +641,7 @@ const char* cmStateDirectory::GetProperty(const std::string& prop,
     if (parentSnapshot.IsValid()) {
       return parentSnapshot.GetDirectory().GetProperty(prop, chain);
     }
-    return this->Snapshot_.State->GetGlobalProperty(prop);
+    retVal = this->Snapshot_.State->GetGlobalProperty(prop);
   }
 
   return retVal ? retVal->c_str() : nullptr;
diff --git a/Source/cmake.cxx b/Source/cmake.cxx
index f26fce9..63bff83 100644
--- a/Source/cmake.cxx
+++ b/Source/cmake.cxx
@@ -1510,10 +1510,10 @@ int cmake::Configure()
   this->Messenger->SetDevWarningsAsErrors(value && cmIsOff(*value));
 
   int ret = this->ActualConfigure();
-  const char* delCacheVars =
+  cmProp delCacheVars =
     this->State->GetGlobalProperty("__CMAKE_DELETE_CACHE_CHANGE_VARS_");
-  if (delCacheVars && delCacheVars[0] != 0) {
-    return this->HandleDeleteCacheVariables(delCacheVars);
+  if (delCacheVars && !delCacheVars->empty()) {
+    return this->HandleDeleteCacheVariables(*delCacheVars);
   }
   return ret;
 }
@@ -2428,7 +2428,7 @@ void cmake::AppendProperty(const std::string& prop, const std::string& value,
   this->State->AppendGlobalProperty(prop, value, asString);
 }
 
-const char* cmake::GetProperty(const std::string& prop)
+cmProp cmake::GetProperty(const std::string& prop)
 {
   return this->State->GetGlobalProperty(prop);
 }
@@ -2669,10 +2669,10 @@ void cmake::IssueMessage(MessageType t, std::string const& text,
 std::vector<std::string> cmake::GetDebugConfigs()
 {
   std::vector<std::string> configs;
-  if (const char* config_list =
+  if (cmProp config_list =
         this->State->GetGlobalProperty("DEBUG_CONFIGURATIONS")) {
     // Expand the specified list and convert to upper-case.
-    cmExpandList(config_list, configs);
+    cmExpandList(*config_list, configs);
     std::transform(configs.begin(), configs.end(), configs.begin(),
                    cmSystemTools::UpperCase);
   }
diff --git a/Source/cmake.h b/Source/cmake.h
index 58769fd..7705f0e 100644
--- a/Source/cmake.h
+++ b/Source/cmake.h
@@ -364,7 +364,7 @@ public:
   void SetProperty(const std::string& prop, const char* value);
   void AppendProperty(const std::string& prop, const std::string& value,
                       bool asString = false);
-  const char* GetProperty(const std::string& prop);
+  cmProp GetProperty(const std::string& prop);
   bool GetPropertyAsBool(const std::string& prop);
 
   //! Get or create an cmInstalledFile instance and return a pointer to it