Adding CMake and github action

.github/workflows/build.yml

@@ -0,0 +1,151 @@
+name: Cross-Platform Build CI
+
+on:
+  push:
+    branches:
+      - '**'        # Matches every branch push
+  pull_request:
+    branches:
+      - '**'        # Matches every pull request target branch
+  workflow_dispatch: # Allows manual trigger from the GitHub Actions tab
+
+jobs:
+  # ---------------------------------------------------------------------------
+  # Linux Builds (Ubuntu)
+  # ---------------------------------------------------------------------------
+  linux:
+    name: Linux (Ubuntu)
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout Code
+        uses: actions/checkout@v6
+
+      - name: Install Dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y libudev-dev ninja-build
+
+      - name: Build Shared Library
+        run: |
+          cmake -G Ninja -B build-shared \
+            -DCMAKE_BUILD_TYPE=Release \
+            -DBUILD_SHARED_LIBS=ON \
+            -DLIBSERIALPORT_BUILD_EXAMPLES=ON \
+            -DCMAKE_INSTALL_PREFIX=stage/shared
+          cmake --build build-shared
+          cmake --install build-shared
+
+      - name: Build Static Library
+        run: |
+          cmake -G Ninja -B build-static \
+            -DCMAKE_BUILD_TYPE=Release \
+            -DBUILD_SHARED_LIBS=OFF \
+            -DLIBSERIALPORT_BUILD_EXAMPLES=OFF \
+            -DCMAKE_INSTALL_PREFIX=stage/static
+          cmake --build build-static
+          cmake --install build-static
+
+      - name: Upload Linux Artifacts
+        uses: actions/upload-artifact@v7
+        with:
+          name: libserialport-linux-x86_64
+          path: stage/
+
+  # ---------------------------------------------------------------------------
+  # macOS Builds (Apple Silicon & Intel via Universal Binary layout)
+  # ---------------------------------------------------------------------------
+  macos:
+    name: macOS (Apple)
+    runs-on: macos-latest
+    steps:
+      - name: Checkout Code
+        uses: actions/checkout@v6
+
+      - name: Build Shared Library
+        run: |
+          cmake -G Ninja -B build-shared \
+            -DCMAKE_BUILD_TYPE=Release \
+            -DBUILD_SHARED_LIBS=ON \
+            -DLIBSERIALPORT_BUILD_EXAMPLES=ON \
+            -DCMAKE_INSTALL_PREFIX=stage/shared
+          cmake --build build-shared
+          cmake --install build-shared
+
+      - name: Build Static Library
+        run: |
+          cmake -G Ninja -B build-static \
+            -DCMAKE_BUILD_TYPE=Release \
+            -DBUILD_SHARED_LIBS=OFF \
+            -DLIBSERIALPORT_BUILD_EXAMPLES=OFF \
+            -DCMAKE_INSTALL_PREFIX=stage/static
+          cmake --build build-static
+          cmake --install build-static
+
+      - name: Upload macOS Artifacts
+        uses: actions/upload-artifact@v7
+        with:
+          name: libserialport-macos-universal
+          path: stage/
+
+  # ---------------------------------------------------------------------------
+  # Windows Builds (MSYS2 Environments)
+  # ---------------------------------------------------------------------------
+  windows-msys2:
+    name: Windows (${{ matrix.msys_env }})
+    runs-on: windows-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - msys_env: mingw64
+            sys_prefix: mingw-w64-x86_64
+          - msys_env: ucrt64
+            sys_prefix: mingw-w64-ucrt-x86_64
+          - msys_env: clang64
+            sys_prefix: mingw-w64-clang-x86_64
+
+    defaults:
+      run:
+        shell: msys2 {0}
+
+    steps:
+      - name: Checkout Code
+        uses: actions/checkout@v6
+
+      - name: Setup MSYS2 Subsystem
+        uses: msys2/setup-msys2@v2
+        with:
+          msystem: ${{ matrix.msys_env }}
+          update: true
+          install: >-
+            git
+            make
+            ${{ matrix.sys_prefix }}-cc
+            ${{ matrix.sys_prefix }}-cmake
+            ${{ matrix.sys_prefix }}-ninja
+
+      - name: Build Shared Library
+        run: |
+          cmake -G Ninja -B build-shared \
+            -DCMAKE_BUILD_TYPE=Release \
+            -DBUILD_SHARED_LIBS=ON \
+            -DLIBSERIALPORT_BUILD_EXAMPLES=ON \
+            -DCMAKE_INSTALL_PREFIX=stage/shared
+          cmake --build build-shared
+          cmake --install build-shared
+
+      - name: Build Static Library
+        run: |
+          cmake -G Ninja -B build-static \
+            -DCMAKE_BUILD_TYPE=Release \
+            -DBUILD_SHARED_LIBS=OFF \
+            -DLIBSERIALPORT_BUILD_EXAMPLES=OFF \
+            -DCMAKE_INSTALL_PREFIX=stage/static
+          cmake --build build-static
+          cmake --install build-static
+
+      - name: Upload Windows Artifacts
+        uses: actions/upload-artifact@v7
+        with:
+          name: libserialport-windows-${{ matrix.msys_env }}
+          path: stage/

.github/workflows/msvc-build.yml

@@ -0,0 +1,44 @@
+name: MSVC Build All Archs
+
+on:
+  push:
+    branches: ['**']
+  pull_request:
+    branches: ['**']
+
+jobs:
+  build:
+    name: Build ${{ matrix.arch }}
+    runs-on: windows-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - { arch: x86, platform: Win32 }
+          - { arch: x64, platform: x64 }
+          - { arch: arm64, platform: ARM64 }
+
+    steps:
+      - name: Checkout Code
+        uses: actions/checkout@v6
+
+      - name: Build Shared Library
+        run: |
+          cmake -B build-shared -A ${{ matrix.platform }} -DBUILD_SHARED_LIBS=ON
+          cmake --build build-shared --config Release
+
+      - name: Build Static Library
+        run: |
+          cmake -B build-static -A ${{ matrix.platform }} -DBUILD_SHARED_LIBS=OFF
+          cmake --build build-static --config Release
+
+      - name: Archive Artifacts
+        uses: actions/upload-artifact@v7
+        with:
+          name: libserialport-${{ matrix.arch }}
+          path: |
+            build-shared/Release/serialport.dll
+            build-shared/Release/serialport.lib
+            build-shared/Release/list_ports.exe
+            build-static/Release/serialport.lib
+            build-static/Release/list_ports.exe

CMakeLists.txt

@@ -0,0 +1,63 @@
+cmake_minimum_required(VERSION 3.12)
+project(libserialport C)
+
+# --- 1. Autotools Compatibility & Visibility Definitions ---
+if(NOT WIN32)
+    # Generate an empty config.h in the binary directory to satisfy #include <config.h>
+    if(NOT EXISTS "${CMAKE_CURRENT_BINARY_DIR}/config.h")
+        file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/config.h" "/* Generated by CMake */\n")
+    endif()
+    include_directories(${CMAKE_CURRENT_BINARY_DIR})
+endif()
+
+# Gather common implementation source files
+set(SERIALPORT_SOURCES
+    serialport.c
+    timing.c
+)
+
+# Platform-specific backend mapping
+if(WIN32)
+    list(APPEND SERIALPORT_SOURCES windows.c)
+    set(WINDOWS_LIBS setupapi cfgmgr32)
+elseif(APPLE)
+    list(APPEND SERIALPORT_SOURCES macosx.c)
+    find_library(FRAMEWORK_IOKIT IOKit REQUIRED)
+    find_library(FRAMEWORK_COREFOUNDATION CoreFoundation REQUIRED)
+    set(APPLE_LIBS ${FRAMEWORK_IOKIT} ${FRAMEWORK_COREFOUNDATION})
+else()
+    list(APPEND SERIALPORT_SOURCES linux.c)
+endif()
+
+# --- 2. Core Library Target ---
+add_library(serialport ${SERIALPORT_SOURCES})
+
+# Use root directory for headers, set as SYSTEM so <libserialport.h> works everywhere
+target_include_directories(serialport SYSTEM PUBLIC ${CMAKE_CURRENT_SOURCE_DIR})
+
+# Ensure internal visibility macro SP_PRIV is defined across all platforms
+target_compile_definitions(serialport PUBLIC SP_PRIV=)
+
+if(WIN32)
+    target_link_libraries(serialport PRIVATE ${WINDOWS_LIBS})
+
+    if(BUILD_SHARED_LIBS)
+        # Shared Build: Library defines MSBUILD privately so it exports symbols,
+        # but examples do NOT inherit it so they use dllimport.
+        target_compile_definitions(serialport PRIVATE LIBSERIALPORT_MSBUILD=1)
+    else()
+        # Static Build: Both the library AND the examples MUST see these definitions PUBLICLY.
+        # This prevents the header from falling back to __declspec(dllimport).
+        target_compile_definitions(serialport PUBLIC LIBSERIALPORT_MSBUILD=1 SP_API=)
+    endif()
+
+elseif(APPLE)
+    target_link_libraries(serialport PRIVATE ${APPLE_LIBS})
+endif()
+
+# --- 3. Examples Build Configuration ---
+if(IS_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}/examples")
+    add_executable(list_ports examples/list_ports.c)
+    target_link_libraries(list_ports PRIVATE serialport)
+    target_include_directories(list_ports PRIVATE ${CMAKE_CURRENT_SOURCE_DIR})
+endif()