cppfront compilation works

CMakeLists.txt

@@ -66,9 +66,10 @@ if(${configuration_is_ready})
 
   preinitialize_cpu()
   project(Yasboot ASM C CXX)
+  include_directories(BEFORE ${CMAKE_CURRENT_SOURCE_DIR}/libstd)
   # This will be extracted to external repository
 
-  set(CXX_STANDARD 20)
+  set(CMAKE_CXX_STANDARD 23)
   initialize_cpu()
 
   add_library(yasboot_public_flags INTERFACE)

cmake/cppfront.cmake

@@ -46,6 +46,7 @@ function(cppfront_generate_source input output)
     add_custom_command(
         OUTPUT ${output}
         COMMAND ${CPPFRONT_BINARY_DIR}/cppfront ${input} -fno-rtti -fno-exceptions -o ${output}
+        DEPENDS ${input}
         VERBATIM
     )
 endfunction()

cmake/cppfront/CMakeLists.txt

@@ -25,8 +25,8 @@ include(FetchContent)
 
 FetchContent_Declare(
     cppfront 
-    GIT_REPOSITORY https://github.com/hsutter/cppfront.git
-    GIT_TAG main
+    GIT_REPOSITORY https://github.com/matgla/cppfront.git
+    GIT_TAG fixNoRtti 
 )
 
 FetchContent_MakeAvailable(cppfront)

cpu/arm/v6-m/common/source/system_stubs.cpp

@@ -130,6 +130,13 @@ extern "C"
   {
     auto [fs, path] =
       yasboot::fs::FilesystemMountPoints::get().get_mount_point(pathname);
+
+    if (!fs)
+    {
+      printf("Responding with -1\n");
+      errno = ENOENT;
+      return -1;
+    }
 
     return fs->open(path, flags);
   }

hal/interface/include/hal/system_stubs.hpp

@@ -22,12 +22,12 @@
 
 #include <string_view>
 
-#include <eul/functional/function.hpp>
+#include <functional>
 
 namespace yasboot::hal
 {
 
-using WriteCallback = eul::function<size_t(const std::string_view &data), sizeof(void *)>;
+using WriteCallback = std::function<size_t(const std::string_view &data)>;
 
 void setGlobalWrite(const WriteCallback &write);
 WriteCallback &getGlobalWrite();

libstd/iostream

@@ -0,0 +1,37 @@
+#pragma once 
+
+#include <cstdio>
+#include <string>
+#include <string_view>
+
+namespace std 
+{
+
+class stream 
+{
+public:
+    stream& operator<<(const auto& t)
+    {
+        printf("%s", std::to_string(t).c_str());
+        return *this;
+    }
+
+    stream& operator<<(const std::string_view& t)
+    {
+        printf("%s", t.data()); 
+        return *this;
+    }
+    stream& operator<<(const char* t)
+    {
+        printf("%s", t); 
+        return *this;
+    }
+
+
+
+};
+
+[[maybe_unused]] static inline stream cerr;
+[[maybe_unused]] static inline stream cout;
+
+}

source/main.cpp2

@@ -1,8 +1,14 @@
 #include "hal/uart.hpp"
+#include "hal/system_stubs.hpp"
 
 main: () = {
     uart: yasboot::hal::Uart<0> = 115200;
+    vec: std::vector<uint8_t> = 0;
     yasboot::hal::setGlobalWrite(: (str: std::string_view) -> std::size_t = 
        uart$.write(str));
     printf("Hello from Yasboot in CPP2\n");
-}
+    f := cpp2::fopen("Non existing file", "r");
+    buf:  std::array<uint8_t, 10> = (); 
+    ret := f.fscanf("%s", buf);
+    printf("File: %s, %d\n", buf.data(), ret);
+}