CMAKE: added cmake build support

.github/workflows/build.yml

@@ -47,3 +47,39 @@ jobs:
       with:
         name: macOS
         path: build/*.zip
+
+  build-cmake:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os:
+          - ubuntu-18.04
+          - windows-2019
+          - macos-10.15
+
+    steps:
+      - name: "Checkout"
+        uses: actions/checkout@v2
+
+      - name: "Install Dependencies (Linux)"
+        if: ${{ runner.os == 'Linux' }}
+        run: |
+          sudo apt-get update
+          sudo apt-get install libsdl2-dev
+
+      - name: "Install Dependencies (OSX)"
+        if: ${{ runner.os == 'macOS' }}
+        run: |
+          brew install sdl2
+
+      - name: "Install Dependencies (Windows)"
+        if: ${{ runner.os == 'Windows' }}
+        run: choco install zip
+
+      - name: "Compile"
+        run: |
+          mkdir build
+          cd build
+          cmake .. -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=install
+          cmake --build .
+          cmake --install .

CMakeLists.txt

@@ -0,0 +1,86 @@
+cmake_minimum_required(VERSION 3.11)
+project(ioquake3 VERSION 1.36 LANGUAGES C ASM)
+
+include(CheckSymbolExists)
+include(CheckCCompilerFlag)
+
+set(ROOT_DIR ${CMAKE_CURRENT_SOURCE_DIR})
+set(CODE_DIR ${ROOT_DIR}/code)
+set(LIBS_DIR ${ROOT_DIR}/libs)
+
+set(ENGINE_BINARY_DIR ${CMAKE_BINARY_DIR})
+
+option(DEFAULT_BASEDIR "extra path to search for baseq3 and such" "")
+option(BUILD_CLIENT "build the 'ioquake3' client binary" ON)
+option(BUILD_SERVER "build the 'ioq3ded' server binary" ON)
+option(BUILD_RENDERER_OPENGL2 "" ON)
+option(BUILD_AUTOUPDATER "DON'T build unless you mean to!" OFF)
+option(BUILD_STANDALONE "build binaries suited for stand-alone games" OFF)
+
+set(SERVERBIN "ioq3ded" CACHE STRING "server binary")
+set(CLIENTBIN "ioquake3" CACHE STRING "client binary")
+
+option(USE_RENDERER_DLOPEN "build and use the renderer in a library" ON)
+option(USE_OPENAL_DLOPEN "link with OpenAL at runtime" ON)
+option(USE_CURL_DLOPEN "link with libcurl at runtime" ON)
+option(USE_VOIP "enable built-in VoIP support" ON)
+option(USE_MUMBLE "enable Mumble support" ON)
+
+if (MSVC)
+    set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} /MANIFEST:NO")
+    set(CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} /MANIFEST:NO")
+    set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} /MANIFEST:NO")
+    # 4244 conversion from 'float' to 'int', possible loss of data
+    # 4305 truncation from 'double' to 'float'
+    # 4820 padding
+    # 5045 spectre instruction
+    # 4668 unknown macro definition
+    # 4061 explicit switch case enum mention
+    # 4242 possible loss of data (convert int to short)
+    # 4464 relative include path
+    # 4619 warning id is not available
+    # 4245 return signed/unsigned conflict
+    # 4100 unreferenced formal parameter
+    # 4255 invalid function prototype - missing void
+    # 4389 comparison signed/unsigned
+    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /wd4267 /wd4244 /wd4305 /wd4820 /wd5045 /wd4668 /wd4061 /wd4242 /wd4464 /wd4619 /wd4245 /wd4100 /wd4255 /wd4389")
+    add_compile_definitions(_CRT_SECURE_NO_WARNINGS)
+endif()
+
+set(CMAKE_POSITION_INDEPENDENT_CODE ON)
+
+if (APPLE)
+    set(CMAKE_OSX_DEPLOYMENT_TARGET 10.9)
+    add_compile_definitions(MAC_OS_X_VERSION_MIN_REQUIRED=1070)
+endif()
+
+set(ARCH_STRING x86)
+if(CMAKE_SIZEOF_VOID_P EQUAL 8)
+    set(ARCH_STRING x86_64)
+endif()
+
+add_compile_definitions(PRODUCT_VERSION="${CMAKE_PROJECT_VERSION}" ARCH_STRING="${ARCH_STRING}")
+
+if (BUILD_STANDALONE)
+    add_compile_definitions(STANDALONE)
+endif()
+
+macro(check_compiler_flag flag)
+  string(REGEX REPLACE "[-=+]" "_" _flag ${flag})
+  string(TOUPPER ${_flag} _flagfinal)
+  check_c_compiler_flag("${flag}" COMPILER_SUPPORTS_${_flagfinal})
+  if (COMPILER_SUPPORTS_${_flagfinal})
+    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${flag}")
+  endif()
+endmacro()
+
+check_compiler_flag(-Wformat=2)
+check_compiler_flag(-Wno-format-zero-length)
+check_compiler_flag(-Wformat-security)
+check_compiler_flag(-Wno-format-nonliteral)
+check_compiler_flag(-Wstrict-aliasing=2)
+check_compiler_flag(-Wmissing-format-attribute)
+check_compiler_flag(-Wdisabled-optimization)
+check_compiler_flag(-Werror-implicit-function-declaration)
+
+add_subdirectory(code)

code/AL/CMakeLists.txt

@@ -0,0 +1,22 @@
+add_library(openal INTERFACE)
+target_compile_definitions(openal INTERFACE USE_OPENAL)
+if (USE_OPENAL_DLOPEN)
+    target_compile_definitions(openal INTERFACE USE_OPENAL_DLOPEN)
+endif()
+
+find_package(OpenAL)
+if (OPENAL_FOUND)
+    if (USE_OPENAL_DLOPEN)
+        target_compile_definitions(openal INTERFACE ALDRIVER_DEFAULT="${OPENAL_LIBRARY}")
+    else()
+        set(LIBS ${OPENAL_LIBRARY})
+    endif()
+    set(INCLUDE_DIRS ${OPENAL_INCLUDE_DIR})
+else()
+    set(INCLUDE_DIRS .. .)
+endif()
+
+if (LIBS)
+    target_link_libraries(openal INTERFACE ${LIBS})
+endif()
+target_include_directories(openal INTERFACE ${INCLUDE_DIRS})