server: backport to C++11

CMakeLists.txt

@@ -723,10 +723,7 @@ if(NOT CMake_TEST_EXTERNAL_CMAKE)
   if(NOT DEFINED CMake_ENABLE_SERVER_MODE)
     list(FIND CMAKE_CXX_COMPILE_FEATURES cxx_auto_type CMake_HAVE_CXX_AUTO_TYPE)
     list(FIND CMAKE_CXX_COMPILE_FEATURES cxx_range_for CMake_HAVE_CXX_RANGE_FOR)
-    if(CMake_HAVE_CXX_AUTO_TYPE
-        AND CMake_HAVE_CXX_MAKE_UNIQUE
-        AND CMake_HAVE_CXX_RANGE_FOR
-        )
+    if(CMake_HAVE_CXX_AUTO_TYPE AND CMake_HAVE_CXX_RANGE_FOR)
       set(CMake_ENABLE_SERVER_MODE 1)
     else()
       set(CMake_ENABLE_SERVER_MODE 0)

Source/cmAlgorithms.h

@@ -9,6 +9,7 @@
 #include <algorithm>
 #include <functional>
 #include <iterator>
+#include <memory>
 #include <sstream>
 #include <string.h>
 #include <string>
@@ -402,4 +403,22 @@ inline void cmStripSuffixIfExists(std::string& str, const std::string& suffix)
   }
 }
 
+namespace cm {
+
+#if defined(CMake_HAVE_CXX_MAKE_UNIQUE)
+
+using std::make_unique;
+
+#else
+
+template <typename T, typename... Args>
+std::unique_ptr<T> make_unique(Args&&... args)
+{
+  return std::unique_ptr<T>(new T(std::forward<Args>(args)...));
+}
+
+#endif
+
+} // namespace cm
+
 #endif

Source/cmServer.cxx

@@ -2,6 +2,7 @@
    file Copyright.txt or https://cmake.org/licensing for details.  */
 #include "cmServer.h"
 
+#include "cmAlgorithms.h"
 #include "cmConnection.h"
 #include "cmFileMonitor.h"
 #include "cmServerDictionary.h"
@@ -78,7 +79,7 @@ void cmServer::ProcessRequest(cmConnection* connection,
   std::unique_ptr<DebugInfo> debug;
   Json::Value debugValue = value["debug"];
   if (!debugValue.isNull()) {
-    debug = std::make_unique<DebugInfo>();
+    debug = cm::make_unique<DebugInfo>();
     debug->OutputFile = debugValue["dumpToFile"].asString();
     debug->PrintStatistics = debugValue["showStats"].asBool();
   }

Source/cmServerProtocol.cxx

@@ -220,7 +220,7 @@ bool cmServerProtocol::Activate(cmServer* server,
 {
   assert(server);
   this->m_Server = server;
-  this->m_CMakeInstance = std::make_unique<cmake>(cmake::RoleProject);
+  this->m_CMakeInstance = cm::make_unique<cmake>(cmake::RoleProject);
   const bool result = this->DoActivate(request, errorMessage);
   if (!result) {
     this->m_CMakeInstance = nullptr;