First fixes towards compilation on Visual Studio 2013

src/database/database.cpp

@@ -48,6 +48,23 @@ const std::vector<Database::DatabaseEntry> Database::database = {
   KernelSelectionHalf, KernelSelectionSingle, KernelSelectionDouble, KernelSelectionComplexSingle, KernelSelectionComplexDouble
 };
 
+// The OpenCL device types
+const std::string Database::kDeviceTypeCPU = "CPU";
+const std::string Database::kDeviceTypeGPU = "GPU";
+const std::string Database::kDeviceTypeAccelerator = "accelerator";
+const std::string Database::kDeviceTypeAll = "default";
+
+// The OpenCL device vendors
+const std::string Database::kDeviceVendorAll = "default";
+
+// Alternative names for some OpenCL vendors
+const std::unordered_map<std::string, std::string> Database::kVendorNames{
+  { "Intel(R) Corporation", "Intel" },
+  { "GenuineIntel", "Intel" },
+  { "Advanced Micro Devices, Inc.", "AMD" },
+  { "NVIDIA Corporation", "NVIDIA" },
+};
+
 // =================================================================================================
 
 // Constructor, computing device properties and populating the parameter-vector from the database.

src/database/database.hpp

@@ -51,21 +51,16 @@ class Database {
   };
 
   // The OpenCL device types
-  static constexpr auto kDeviceTypeCPU = "CPU";
-  static constexpr auto kDeviceTypeGPU = "GPU";
-  static constexpr auto kDeviceTypeAccelerator = "accelerator";
-  static constexpr auto kDeviceTypeAll = "default";
+  static const std::string kDeviceTypeCPU;
+  static const std::string kDeviceTypeGPU;
+  static const std::string kDeviceTypeAccelerator;
+  static const std::string kDeviceTypeAll;
 
   // The OpenCL device vendors
-  static constexpr auto kDeviceVendorAll = "default";
+  static const std::string kDeviceVendorAll;
 
   // Alternative names for some OpenCL vendors
-  const std::unordered_map<std::string,std::string> kVendorNames {
-    {"Intel(R) Corporation", "Intel"},
-    {"GenuineIntel", "Intel"},
-    {"Advanced Micro Devices, Inc.", "AMD"},
-    {"NVIDIA Corporation", "NVIDIA"},
-  };
+  static const std::unordered_map<std::string, std::string> kVendorNames;
 
   // The database consists of separate database entries, stored together in a vector
   static const DatabaseEntry XaxpyHalf, XaxpySingle, XaxpyDouble, XaxpyComplexSingle, XaxpyComplexDouble;

src/msvc.hpp

@@ -0,0 +1,39 @@
+
+// =================================================================================================
+// This file is part of the CLBlast project. The project is licensed under Apache Version 2.0. This
+// project loosely follows the Google C++ styleguide and uses a tab-size of two spaces and a max-
+// width of 100 characters per line.
+//
+// Author(s):
+//   Cedric Nugteren <www.cedricnugteren.nl>
+//
+// This file provides macro's and definitions to make compilation work on Microsoft Visual Studio,
+// in particular for versions older than 2015 with limited C++11 support.
+// MSVC++ 14.0 _MSC_VER == 1900 (Visual Studio 2015)
+// MSVC++ 12.0 _MSC_VER == 1800 (Visual Studio 2013)
+// MSVC++ 11.0 _MSC_VER == 1700 (Visual Studio 2012)
+// MSVC++ 10.0 _MSC_VER == 1600 (Visual Studio 2010)
+// MSVC++ 9.0  _MSC_VER == 1500 (Visual Studio 2008)
+//
+// =================================================================================================
+
+#ifndef CLBLAST_MSVC_HPP_
+#define CLBLAST_MSVC_HPP_
+
+namespace clblast {
+// =================================================================================================
+#ifdef _MSC_VER
+
+// No support for constexpr prior to 2015. Note that this only works with constants, not with
+// constexpr functions (unused in this project).
+#if _MSC_VER < 1900
+#define constexpr const
+#endif
+
+// _MSC_VER
+#endif
+// =================================================================================================
+} // namespace clblast
+
+// CLBLAST_MSVC_HPP_
+#endif

src/utilities.hpp

@@ -25,6 +25,10 @@
 #include "clblast_half.h"
 #include "clpp11.hpp"
 
+#ifdef _MSC_VER
+  #include "msvc.hpp"
+#endif
+
 namespace clblast {
 // =================================================================================================