added back windows cross-compilation

Makefile.am is too ugly, but I don't have a better solution right now.

- fused Makefile.am and src/Makefile.am
- adding back windows cross-compilation
- improved README.md a lot
- added configure option to enable debug, which greatly simplifies
  development when writing shaders
- removed dependency on LunarG's Vulkan SDK by having dependency only on
  Vulkan headers, library and slangc
- removed print C++ header because I have an old MinGW which doesn't
  support it. It will be restored in the future
- make every assets path relative to be able to build anywhere and run
  elsewhere
- moved stb_image.h inside source directory instead of making it a
  dependency, which is more aligned with stb philosophy
- moved assets inside source code to make it easy to compile and run the
  engine
- improved configure.ac by checking Vulkan headers version directly in
  the configure script instead of within C code, which allows us to also
  do theses checks when cross-compiling

1 files changed, 2 insertions, 1 deletions

diff --git a/src/obj_parser.hpp b/src/obj_parser.hpp
index df3f9fe..d5ba6bb 100644
--- a/src/obj_parser.hpp
+++ b/src/obj_parser.hpp
@@ -2,10 +2,11 @@
 #define OBJ_PARSER_HPP
 
 #include "o3d/mesh.hpp"
+#include <filesystem>
 
 namespace engine {
 
-o3d::Mesh parse_object(const std::string& obj_path);
+o3d::Mesh parse_object(const std::filesystem::path& obj_path);
 
 }