commit basics of project

.gitignore

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+bin/
+build/

CMakeLists.txt

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+# Specify the minimum required version of CMake
+cmake_minimum_required(VERSION 3.10)
+
+# Set the project name and version
+project(MessiVsRonaldo VERSION 1.0)
+
+# Specify the C++ standard (e.g., C++17)
+set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_STANDARD_REQUIRED True)
+
+# Set the output directory for the executable
+set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_SOURCE_DIR}/bin)
+
+file(MAKE_DIRECTORY ${CMAKE_BINARY_DIR})
+file(MAKE_DIRECTORY ${CMAKE_RUNTIME_OUTPUT_DIRECTORY})
+
+# Automatically find all .cpp files in the src directory
+file(GLOB SOURCES "src/*.cpp")
+
+# Add an executable target
+add_executable(MessiVsRonaldo ${SOURCES})
+
+# Include the "include" directory (if you have header files)
+target_include_directories(MessiVsRonaldo PUBLIC ${CMAKE_SOURCE_DIR}/include)

README.md

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+# Cross Platform test with CMAKE, win32 and x11
+

src/main.cpp

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+
+
+#ifdef _WIN32
+#include <windows.h>
+// Tells msvc compiler to not show the console window
+#pragma comment(linker, "/SUBSYSTEM:WINDOWS /ENTRY:mainCRTStartup")
+
+int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow);
+#endif
+
+#ifdef __linux__
+#include <X11/Xlib.h>
+#include <X11/Xutil.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+void showMessageBox(Display *display, const char *title, const char *message);
+#endif
+
+int main(){
+
+  #ifdef _WIN32
+  HINSTANCE hInstance = GetModuleHandle(nullptr);
+
+  LPSTR lpCmdLine = GetCommandLineA();
+
+  return WinMain(hInstance, nullptr, lpCmdLine, SW_SHOWDEFAULT);
+  #endif
+
+  #ifdef __linux__
+  Display *display = XOpenDisplay(NULL);
+  if (!display) {
+      fprintf(stderr, "Unable to open X display\n");
+      return 1;
+  }
+
+  // Show the message box
+  showMessageBox(display, "X11 Message Box", "Hello, X11!");
+
+  // Close the connection to the X server
+  XCloseDisplay(display);
+  #endif
+
+  return 0;
+}

src/winmain.cpp

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+
+#ifdef _WIN32
+#include <windows.h>
+
+int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) {
+  MessageBox(nullptr, "Hello, World!", "Win32 Application", MB_OK);
+  return 0;
+}
+
+#endif

src/xeleven.cpp

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+
+#ifdef __linux__
+
+#include <X11/Xlib.h>
+#include <X11/Xutil.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+// Function to display a message box
+void showMessageBox(Display *display, const char *title, const char *message) {
+    // Open a connection to the X server
+    int screen = DefaultScreen(display);
+
+    // Create a simple window
+    Window window = XCreateSimpleWindow(
+        display, RootWindow(display, screen),
+        100, 100, 400, 200, 1,
+        BlackPixel(display, screen), WhitePixel(display, screen)
+    );
+
+    // Set the window title
+    XStoreName(display, window, title);
+
+    // Select events to handle
+    XSelectInput(display, window, ExposureMask | KeyPressMask);
+
+    // Create a graphics context for drawing
+    GC gc = XCreateGC(display, window, 0, NULL);
+
+    // Map the window (make it visible)
+    XMapWindow(display, window);
+
+    // Event loop
+    XEvent event;
+    while (1) {
+        XNextEvent(display, &event);
+
+        // Handle expose event (window needs to be redrawn)
+        if (event.type == Expose) {
+            // Draw the message in the window
+            XDrawString(display, window, gc, 50, 100, message, strlen(message));
+        }
+
+        // Handle key press event (close the window)
+        if (event.type == KeyPress) {
+            break;
+        }
+    }
+
+    // Clean up
+    XFreeGC(display, gc);
+    XDestroyWindow(display, window);
+}
+
+#endif