stabilize build system: depends, installer, boost/bdb fixes, cross targets groundwork

depends/x86_64-pc-linux-gnu/include/boost/compute/detail/path.hpp

@@ -0,0 +1,73 @@
+//---------------------------------------------------------------------------//
+// Copyright (c) 2013-2014 Kyle Lutz <kyle.r.lutz@gmail.com>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+// See http://boostorg.github.com/compute for more information.
+//---------------------------------------------------------------------------//
+
+#ifndef BOOST_COMPUTE_DETAIL_PATH_HPP
+#define BOOST_COMPUTE_DETAIL_PATH_HPP
+
+#include <boost/filesystem/path.hpp>
+#include <boost/filesystem/operations.hpp>
+#include <boost/compute/detail/getenv.hpp>
+
+namespace boost {
+namespace compute {
+namespace detail {
+
+// Path delimiter symbol for the current OS.
+static const std::string& path_delim()
+{
+    static const std::string delim =
+        boost::filesystem::path("/").make_preferred().string();
+    return delim;
+}
+
+// Path to appdata folder.
+inline const std::string& appdata_path()
+{
+    #ifdef WIN32
+    static const std::string appdata = detail::getenv("APPDATA")
+        + path_delim() + "boost_compute";
+    #else
+    static const std::string appdata = detail::getenv("HOME")
+        + path_delim() + ".boost_compute";
+    #endif
+    return appdata;
+}
+
+// Path to cached binaries.
+inline std::string program_binary_path(const std::string &hash, bool create = false)
+{
+    std::string dir = detail::appdata_path() + path_delim()
+                    + hash.substr(0, 2) + path_delim()
+                    + hash.substr(2);
+
+    if(create && !boost::filesystem::exists(dir)){
+        boost::filesystem::create_directories(dir);
+    }
+
+    return dir + path_delim();
+}
+
+// Path to parameter caches.
+inline std::string parameter_cache_path(bool create = false)
+{
+    const static std::string dir = appdata_path() + path_delim() + "tune";
+
+    if(create && !boost::filesystem::exists(dir)){
+        boost::filesystem::create_directories(dir);
+    }
+
+    return dir + path_delim();
+}
+
+} // end detail namespace
+} // end compute namespace
+} // end boost namespace
+
+#endif // BOOST_COMPUTE_DETAIL_PATH_HPP