oot ci build test

testing/cxx-oot-build/.gitignore

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+build/
+nuttx-export*

testing/cxx-oot-build/CMakeLists.txt

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+cmake_minimum_required(VERSION 3.12...3.31)
+
+# --- Guard option ---
+option(BUILD_OOTCPP "Build the Out Of Tree C++ project" OFF)
+
+if(BUILD_OOTCPP)
+  project(
+    OOTCpp
+    VERSION 1.0
+    DESCRIPTION "Out Of Tree Build C++ NuttX")
+
+  message(STATUS "Building OOTCpp project")
+
+  set(CMAKE_CXX_STANDARD 17)
+  set(CMAKE_CXX_STANDARD_REQUIRED ON)
+
+  set(SOURCE_FILES ${CMAKE_SOURCE_DIR}/src/HelloWorld.cpp
+                   ${CMAKE_SOURCE_DIR}/src/main.cpp)
+
+  set(EXE_NAME oot)
+
+  add_executable(${EXE_NAME} ${SOURCE_FILES})
+
+  target_include_directories(${EXE_NAME} PRIVATE ${CMAKE_SOURCE_DIR}/include)
+
+  # Generate a .bin file from the ELF after build
+  add_custom_command(
+    TARGET ${EXE_NAME}
+    POST_BUILD
+    COMMAND ${CMAKE_OBJCOPY} -S -O binary ${CMAKE_BINARY_DIR}/${EXE_NAME}
+            ${CMAKE_BINARY_DIR}/${EXE_NAME}.bin
+    COMMENT "Generating binary image ${EXE_NAME}.bin")
+
+else()
+  message(STATUS "Skipping OOTCpp project")
+endif()

testing/cxx-oot-build/include/HelloWorld.hpp

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+#pragma once
+
+class CHelloWorld
+{
+public:
+    CHelloWorld();
+    ~CHelloWorld() = default;
+
+    bool HelloWorld();
+
+private:
+    int mSecret;
+};

testing/cxx-oot-build/src/HelloWorld.cpp

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+#include <cstdio>
+#include <string>
+
+#include "HelloWorld.hpp"
+
+CHelloWorld::CHelloWorld()
+{
+    mSecret = 42;
+    std::printf("Constructor: mSecret=%d\n",mSecret);
+}
+
+
+bool CHelloWorld::HelloWorld()
+{
+    std::printf("HelloWorld: mSecret=%d\n",mSecret);
+
+    std::string sentence = "Hello";
+    std::printf("TEST=%s\n",sentence.c_str());
+
+    if (mSecret == 42)
+    {
+            std::printf("CHelloWorld: HelloWorld: Hello, world!\n");
+            return true;
+    }
+    else
+    {
+            std::printf("CHelloWorld: HelloWorld: CONSTRUCTION FAILED!\n");
+            return false;
+    }
+}

testing/cxx-oot-build/src/main.cpp

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+#include <memory>
+
+#include "HelloWorld.hpp"
+
+int main(int, char*[])
+{
+    auto pHelloWorld = std::make_shared<CHelloWorld>();
+    pHelloWorld->HelloWorld();
+
+    CHelloWorld helloWorld;
+    helloWorld.HelloWorld();
+
+    return 0;
+}