C++17ification.

C++17ification!

- Filesystem interaction now uses std::filesystem::path.
- Usage of const char*, std::string have been changed to
  std::string_view where appropriate.
- Usage of printf-style functions changed to use fmt.

src/xenia/base/main_posix.cc

@@ -2,7 +2,7 @@
  ******************************************************************************
  * Xenia : Xbox 360 Emulator Research Project                                 *
  ******************************************************************************
- * Copyright 2014 Ben Vanik. All rights reserved.                             *
+ * Copyright 2020 Ben Vanik. All rights reserved.                             *
  * Released under the BSD license - see LICENSE in the root for more details. *
  ******************************************************************************
  */
@@ -10,6 +10,7 @@
 #include "xenia/base/cvar.h"
 #include "xenia/base/main.h"
 
+#include "xenia/base/filesystem.h"
 #include "xenia/base/logging.h"
 #include "xenia/base/string.h"
 
@@ -25,9 +26,9 @@ extern "C" int main(int argc, char** argv) {
   cvar::ParseLaunchArguments(argc, argv, entry_info.positional_usage,
                              entry_info.positional_options);
 
-  std::vector<std::wstring> args;
+  std::vector<std::string> args;
   for (int n = 0; n < argc; n++) {
-    args.push_back(xe::to_wstring(argv[n]));
+    args.push_back(argv[n]);
   }
 
   // Initialize logging. Needs parsed FLAGS.