Added Android header for compilation with gnustl STL

src/utilities/android.hpp

@@ -0,0 +1,46 @@
+
+// =================================================================================================
+// 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 for Android.
+//
+// =================================================================================================
+
+#ifndef CLBLAST_ANDROID_HPP_
+#define CLBLAST_ANDROID_HPP_
+
+// =================================================================================================
+
+#include <cstdlib>
+#include <string>
+#include <sstream>
+
+namespace std {
+
+// No support for these standard library functions when compiling with 'gnustl_cpp'
+template<typename T>
+std::string to_string(T value) {
+  std::ostringstream os;
+  os << value;
+  return os.str();
+}
+inline double stod(const std::string& value) {
+  return -1.0; // Not implemented
+}
+inline int stoi( const std::string& str, std::size_t* pos = 0, int base = 10) {
+  char * p_end;
+  const auto result = std::strtol(str.c_str(), &p_end, base);
+  return result;
+}
+
+}
+
+// =================================================================================================
+
+// CLBLAST_ANDROID_HPP_
+#endif