feat: add cmake build

Author: dev-joss

CMakeLists.txt

@@ -0,0 +1,23 @@
+cmake_minimum_required(VERSION 3.10)
+project(PSN VERSION 2.03 LANGUAGES CXX)
+
+# Set C++ standard
+set(CMAKE_CXX_STANDARD 11)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+
+# Create header-only library interface
+add_library(psn INTERFACE)
+
+# Add include directory
+target_include_directories(psn INTERFACE
+    $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
+    $<INSTALL_INTERFACE:include>
+)
+
+# Platform-specific settings for network library
+if(WIN32)
+    target_link_libraries(psn INTERFACE ws2_32)
+endif()
+
+# Add examples
+add_subdirectory(examples)

examples/CMakeLists.txt

@@ -0,0 +1,40 @@
+# PSN Examples CMakeLists.txt
+
+# psn_server executable
+add_executable(psn_server
+    vs2015/psn_server/psn_server.cpp
+)
+
+target_link_libraries(psn_server PRIVATE psn)
+
+# psn_client executable
+add_executable(psn_client
+    vs2015/psn_client/psn_client.cpp
+)
+
+target_link_libraries(psn_client PRIVATE psn)
+
+# psn_glut_client executable (optional - requires GLUT and OpenGL)
+find_package(OpenGL)
+find_package(GLUT)
+
+if(OpenGL_FOUND AND GLUT_FOUND)
+    add_executable(psn_glut_client
+        vs2015/psn_glut_client/psn_glut_client.cpp
+    )
+
+    target_link_libraries(psn_glut_client PRIVATE psn OpenGL::GL GLUT::GLUT)
+    target_include_directories(psn_glut_client PRIVATE ${OPENGL_INCLUDE_DIR} ${GLUT_INCLUDE_DIR})
+
+    # macOS specific: no need to copy DLL files
+    # Windows would need post-build copy for glut32.dll or glut64.dll
+
+    message(STATUS "Building psn_glut_client (OpenGL visualizer)")
+else()
+    if(NOT OpenGL_FOUND)
+        message(WARNING "OpenGL not found - skipping psn_glut_client")
+    endif()
+    if(NOT GLUT_FOUND)
+        message(WARNING "GLUT not found - skipping psn_glut_client")
+    endif()
+endif()