CMakeLists.txt

cmake_minimum_required(VERSION 3.21)

project(CataclysmDDA)

list(APPEND CMAKE_MODULE_PATH
        ${CMAKE_SOURCE_DIR}/CMakeModules)
if (NOT VCPKG_MANIFEST_MODE)
    list(APPEND CMAKE_MODULE_PATH
            ${CMAKE_SOURCE_DIR}/CMakeModules/Find)
endif()

set(CMAKE_TLS_VERIFY ON)

# Build options
option(TILES "Build graphical tileset version." "OFF")
option(CURSES "Build curses version." "ON")
option(SOUND "Support for in-game sounds & music." "OFF")
option(BACKTRACE "Support for printing stack backtraces on crash" "ON")
option(LIBBACKTRACE "Print backtrace with libbacktrace." "OFF")
option(USE_HOME_DIR "Use user's home directory for save files." "ON")
option(USE_PREFIX_DATA_DIR "Use UNIX system directories for game data in release build." "ON")
option(LOCALIZE "Support for language localizations. Also enable UTF support." "ON")
option(LANGUAGES "Compile localization files for specified languages." "")
option(DYNAMIC_LINKING
        "Use dynamic linking. Or use static to remove MinGW dependency instead." "ON")
option(JSON_FORMAT "Build JSON formatter" "OFF")
option(CATA_CCACHE "Try to find and build with ccache" "ON")
option(CATA_CLANG_TIDY_PLUGIN "Build Cata's custom clang-tidy checks as a plugin" "OFF")
option(CATA_CLANG_TIDY_EXECUTABLE "Build Cata's custom clang-tidy checks as an executable" "OFF")
set(CATA_CLANG_TIDY_INCLUDE_DIR "" CACHE STRING
        "Path to internal clang-tidy headers required for plugin (e.g. ClangTidy.h)")
set(CATA_CHECK_CLANG_TIDY "" CACHE STRING "Path to check_clang_tidy.py for plugin tests")
set(GIT_BINARY "" CACHE STRING "Git binary name or path.")

include(CTest)

message(STATUS "${PROJECT} build environment --")
message(STATUS "Build realm is: ${CMAKE_SYSTEM_NAME} ${CMAKE_HOST_SYSTEM_PROCESSOR}")

if (NOT CMAKE_BUILD_TYPE)
    set(CMAKE_BUILD_TYPE Debug)
endif ()

add_definitions(-DCMAKE)

include(GetGitRevisionDescription)
git_describe(GIT_VERSION --tags --always --match "[0-9A-Z]*.[0-9A-Z]*")
if (NOT "${GIT_VERSION}" MATCHES "GIT-NOTFOUND")
    string(REPLACE "-NOTFOUND" "" GIT_VERSION ${GIT_VERSION})
    file(WRITE ${CMAKE_SOURCE_DIR}/src/version.h
            "// NOLINT(cata-header-guard)\n\#define VERSION \"${GIT_VERSION}\"\n")
    message(STATUS "${PROJECT_NAME} build version is: ${GIT_VERSION}")
    add_definitions(-DGIT_VERSION)
endif ()

#OS Check Placeholders. Will be used for BINDIST
if ("${CMAKE_SYSTEM_NAME}" MATCHES "Linux")
    set(_OS_LINUX_ 1)
endif ()

if ("${CMAKE_SYSTEM_NAME}" MATCHES "FreeBSD")
    set(_OS_FREEBSD_ 1)
endif ()

if ("${CMAKE_SYSTEM_NAME}" MATCHES "Darwin")
    set(_OS_DARWIN_ 1)
    add_definitions(-DMACOSX)
    if (TILES)
        add_definitions(-DOSX_SDL2_LIBS)
    endif ()
endif ()

include(CheckCXXCompilerFlag)

#FIXME: Add dest build choice: m32 for 32 bit or m64 for 64 bit version
#add_definitions("-m32")
#SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -m32")
#SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -m32")
#SET(CMAKE_SHARED_LIBRARY_C_FLAGS "${CMAKE_SHARED_LIBRARY_C_FLAGS} -m32")
#SET(CMAKE_SHARED_LIBRARY_CXX_FLAGS "${CMAKE_SHARED_LIBRARY_CXX_FLAGS} -m32")

if (NOT DYNAMIC_LINKING)
    if(NOT MSVC)
        set(CMAKE_FIND_LIBRARY_SUFFIXES ".a;.dll.a")
    endif()
    set(BUILD_SHARED_LIBRARIES OFF)
    check_cxx_compiler_flag (-static HAVE_STATIC_FLAG)
    if (HAVE_STATIC_FLAG)
        set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -static")
    endif ()
    # Workaround for cmake link library guesser
    set(CMAKE_EXE_LINK_DYNAMIC_C_FLAGS)       # remove -Wl,-Bdynamic
    set(CMAKE_EXE_LINK_DYNAMIC_CXX_FLAGS)
    set(CMAKE_SHARED_LIBRARY_C_FLAGS)         # remove -fPIC
    set(CMAKE_SHARED_LIBRARY_CXX_FLAGS)
    set(CMAKE_SHARED_LIBRARY_LINK_C_FLAGS)    # remove -rdynamic
    set(CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS)
else ()
    if (MINGW AND NOT "${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
        # Avoid depending on MinGW runtime DLLs
        set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -static-libgcc -static-libstdc++")
    endif ()
endif ()

# System specific actions
if ("${CMAKE_SYSTEM_NAME}" MATCHES "(Linux|FreeBSD|Darwin)")
    if (NOT DATA_PREFIX)
        set(DATA_PREFIX ${CMAKE_INSTALL_PREFIX}/share/cataclysm-dda)
    endif ()
    if (NOT LOCALE_DIR)
        set(LOCALE_DIR ${CMAKE_INSTALL_PREFIX}/share/locale)
    endif ()
    if (NOT BIN_PREFIX)
        set(BIN_PREFIX ${CMAKE_INSTALL_PREFIX}/bin)
    endif ()
    if (NOT DESKTOP_ENTRY_PATH)
        set(DESKTOP_ENTRY_PATH ${CMAKE_INSTALL_PREFIX}/share/applications)
    endif ()
    if (NOT PIXMAPS_ENTRY_PATH)
        set(PIXMAPS_ENTRY_PATH ${CMAKE_INSTALL_PREFIX}/share/icons/hicolor)
    endif ()
    if (NOT PIXMAPS_UNITY_ENTRY_PATH)
        set(PIXMAPS_UNITY_ENTRY_PATH ${CMAKE_INSTALL_PREFIX}/share/icons/ubuntu-mono-dark)
    endif ()
    if (NOT MANPAGE_ENTRY_PATH)
        set(MANPAGE_ENTRY_PATH ${CMAKE_INSTALL_PREFIX}/share/man)
    endif ()
endif ()

if ("${CMAKE_SYSTEM_NAME}" MATCHES "(Windows|MSYS)")
    if (NOT DATA_PREFIX)
        set(DATA_PREFIX ${CMAKE_INSTALL_PREFIX}/data)
    endif ()
    if (NOT LOCALE_DIR)
        set(LOCALE_DIR ${CMAKE_INSTALL_PREFIX}/lang)
    endif ()
    if (NOT BIN_PREFIX)
        set(BIN_PREFIX ${CMAKE_INSTALL_PREFIX})
    endif ()
endif ()

message(STATUS "${PROJECT_NAME} build options --")

# Preset variables
if (NOT LANGUAGES)
    set(LANGUAGES de es_AR es_ES fr it_IT ja ko pt_BR ru zh_CN zh_TW)
endif ()

if (GIT_BINARY)
    set(GIT_EXECUTABLE ${GIT_BINARY})
else ()
    find_package(Git)
    if (NOT GIT_FOUND)
        message(WARNING
            "Git binary not found. Build version will be set to NULL. \
             Install Git package or use -DGIT_BINARY to set path to git binary.")
    endif ()
endif ()

# Can't compile curses and tiles build's at same time
if (TILES)
    set(CURSES OFF)
endif ()

# Set build types and display info
if ("${CMAKE_BUILD_TYPE}" STREQUAL "Debug")
    set(RELEASE 0)
    message(STATUS "Build ${PROJECT} in development mode --")
    message(STATUS "Binaries will be located in: " ${CMAKE_SOURCE_DIR})
    set(CMAKE_VERBOSE_MAKEFILE ON)
    # Since CataclysmDDA does not respect PREFIX for development builds
    # and has funny path handlers, we should create resulting Binaries
    # in the source directory
    set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_SOURCE_DIR} CACHE PATH
            "Single Directory for all Executables.")
    set(BIN_PREFIX ${CMAKE_SOURCE_DIR})
else ()
    set(RELEASE 1)
    message(STATUS "CMAKE_INSTALL_PREFIX          : ${CMAKE_INSTALL_PREFIX}")
    message(STATUS "BIN_PREFIX                    : ${BIN_PREFIX}")
    message(STATUS "DATA_PREFIX                   : ${DATA_PREFIX}")
    if (LOCALIZE)
        message(STATUS "LOCALE_PATH                   : ${LOCALE_DIR}")
    endif ()
    message(STATUS "DESKTOP_ENTRY_PATH            : ${DESKTOP_ENTRY_PATH}")
    message(STATUS "PIXMAPS_ENTRY_PATH            : ${PIXMAPS_ENTRY_PATH}")
    message(STATUS "PIXMAPS_UNITY_ENTRY_PATH      : ${PIXMAPS_UNITY_ENTRY_PATH}")
    message(STATUS "MANPAGE_ENTRY_PATH            : ${MANPAGE_ENTRY_PATH}")
    add_definitions(-DRELEASE)
    # Use CMAKE_INSTALL_PREFIX as storage of data,gfx, etc.. Useful only on *nix OS.
    if (CMAKE_INSTALL_PREFIX AND NOT WIN32 AND USE_PREFIX_DATA_DIR)
        add_definitions(-DPREFIX=${CMAKE_INSTALL_PREFIX})
        configure_file(
            "${CMAKE_SOURCE_DIR}/src/prefix.h.in"
            "${CMAKE_SOURCE_DIR}/src/prefix.h"
            @ONLY)
        add_definitions(-DDATA_DIR_PREFIX)
    endif ()
endif ()

message(STATUS "GIT_BINARY                    : ${GIT_EXECUTABLE}")
message(STATUS "DYNAMIC_LINKING               : ${DYNAMIC_LINKING}")
message(STATUS "TILES                         : ${TILES}")
message(STATUS "CURSES                        : ${CURSES}")
message(STATUS "SOUND                         : ${SOUND}")
message(STATUS "BACKTRACE                     : ${BACKTRACE}")
message(STATUS "LOCALIZE                      : ${LOCALIZE}")
message(STATUS "USE_HOME_DIR                  : ${USE_HOME_DIR}")
message(STATUS "LANGUAGES                     : ${LANGUAGES}")
message(STATUS "See doc/COMPILING/COMPILING-CMAKE.md for details and more info --")

if (MSVC)
    if ("${CMAKE_SIZEOF_VOID_P}" EQUAL "8")
        add_definitions(-D_AMD64_)
    else ()
        add_definitions(-D_X86_)
    endif ()
else ()
    set(CATA_WARNINGS
            "-Werror -Wall -Wextra \
             -Wformat-signedness \
             -Wlogical-op \
             -Wmissing-declarations \
             -Wmissing-noreturn \
             -Wnon-virtual-dtor \
             -Wold-style-cast \
             -Woverloaded-virtual \
             -Wpedantic \
             -Wsuggest-override \
             -Wunused-macros \
             -Wzero-as-null-pointer-constant")
    if("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
        set(CATA_WARNINGS "${CATA_WARNINGS} -Wno-unknown-warning-option")
    else()
        set(CATA_WARNINGS "${CATA_WARNINGS} -Wno-unknown-warning")
    endif()
    if (NOT "${CMAKE_SYSTEM_NAME}" MATCHES "Windows")
        set(CATA_WARNINGS "${CATA_WARNINGS} -Wredundant-decls")
    endif ()
    set(CATA_OTHER_FLAGS "${CATA_OTHER_FLAGS} -fsigned-char")
    # Compact the whitespace in the warning string
    string(REGEX REPLACE "[\t ]+" " " CATA_WARNINGS "${CATA_WARNINGS}")
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${CATA_WARNINGS} ${CATA_OTHER_FLAGS}")
    set(CMAKE_CXX_FLAGS_DEBUG "-Og -g")
endif ()

set(CMAKE_CXX_STANDARD 14)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_CXX_EXTENSIONS OFF)

# Force out-of-source build
if ("${CMAKE_SOURCE_DIR}" STREQUAL "${CMAKE_BINARY_DIR}")
    message(FATAL_ERROR
            "This project requires an out of source build. \
             Remove the file 'CMakeCache.txt' found in this directory before continuing; \
             create a separate build directory and run 'cmake [options] <srcs>' from there. \
             See doc/COMPILING/COMPILING-CMAKE.md for details and more info.")
endif ()

#set(THREADS_USE_PTHREADS_WIN32 True)
set(CMAKE_THREAD_PREFER_PTHREAD True)
find_package(Threads REQUIRED)

find_package(ZLIB REQUIRED)

# Check for build types and libraries
if (TILES)
    # Find SDL, SDL_ttf & SDL_image for graphical install
    message(STATUS "Searching for SDL2 library --")
    find_package(SDL2)
    if (NOT (SDL2_FOUND OR TARGET SDL2::SDL2))
        message(FATAL_ERROR
                "This project requires SDL2 to be installed to compile in graphical mode.  \
                 Please install the SDL2 development libraries, \
                 or try compiling without -DTILES=1 for a text-only compilation. \
                 See doc/COMPILING/COMPILING-CMAKE.md for details and more info.")
    endif ()

    if (NOT DYNAMIC_LINKING)
        # SDL, SDL_Image, SDL_ttf deps are required for static build
        message(STATUS "Searching for SDL deps libraries --")
        find_package(Freetype REQUIRED)
        find_package(PNG REQUIRED)
        find_package(JPEG REQUIRED)
        find_package(ZLIB REQUIRED)
        find_package(BZip2 REQUIRED)
    endif ()

    message(STATUS "Searching for SDL2_TTF library --")
    find_package(SDL2_ttf)
    if (NOT (SDL2_TTF_FOUND OR TARGET SDL2_ttf::SDL2_ttf OR TARGET SDL2_ttf::SDL2_ttf-static))
        message(FATAL_ERROR
                "This project requires SDL2_ttf to be installed to compile in graphical mode. \
                 Please install the SDL2_ttf development libraries, \
                 or try compiling without -DTILES=1 for a text-only compilation. \
                 See doc/COMPILING/COMPILING-CMAKE.md for details and more info.")
    endif ()

    message(STATUS "Searching for SDL2_image library --")
    if(VCPKG_MANIFEST_MODE)
        find_package(sdl2-image)
    else()
        find_package(SDL2_image)
    endif()
    if (NOT (SDL2_IMAGE_FOUND OR TARGET SDL2::SDL2_image))
        message(FATAL_ERROR
                "This project requires SDL2_image to be installed to compile in graphical mode. \
                 Please install the SDL2_image development libraries, \
                 or try compiling without -DTILES=1 for a text-only compilation. \
                 See doc/COMPILING/COMPILING-CMAKE.md for details and more info.")
    endif ()
    add_definitions(-DTILES)
endif ()

if (CURSES)
    # Find the ncurses library for a text based compile
    message(STATUS "Searching for Curses library --")
    set(CURSES_NEED_NCURSES TRUE)
    set(CURSES_NEED_WIDE TRUE)
    find_package(Curses)
    if (NOT CURSES_FOUND)
        message(FATAL_ERROR
                "This project requires ncurses to be installed to be compiled in text-only mode. \
                 Please install the ncurses development libraries, \
                 or try compiling with -DTILES=1 for a graphical compilation. \
                 See doc/COMPILING/COMPILING-CMAKE.md for details and more info")
    endif ()
    if (NOT DYNAMIC_LINKING)
        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DNCURSES_STATIC")
    endif ()
endif ()

if (SOUND)
    # You need TILES to be able to use SOUND
    if (NOT TILES)
        message(FATAL_ERROR
                "You must enable graphical support with -DTILES=1 \
                 to be able to enable sound support. \
                 See doc/COMPILING/COMPILING-CMAKE.md for details and more info.")
    endif ()

    # Sound requires SDL_mixer library
    message(STATUS "Searching for SDL2_mixer library --")
    find_package(SDL2_mixer)
    if(VCPKG_MANIFEST_MODE)
        if (NOT TARGET SDL2_mixer::SDL2_mixer-static) # TODO x64-mingw-static
            message(FATAL_ERROR
                    "You need the SDL2_mixer development library \
                     to be able to compile with sound enabled. \
                     See doc/COMPILING/COMPILING-CMAKE.md for details and more info.")
        endif()
    else()
        if (NOT SDL2_MIXER_FOUND)
            message(FATAL_ERROR
                    "You need the SDL2_mixer development library \
                     to be able to compile with sound enabled. \
                     See doc/COMPILING/COMPILING-CMAKE.md for details and more info.")
        endif ()
    endif()
endif ()

if (BACKTRACE)
    add_definitions(-DBACKTRACE)
    if (LIBBACKTRACE)
        add_definitions(-DLIBBACKTRACE)
    endif ()
endif ()

# Ok. Now create build and install recipes
if (LOCALIZE)
    add_subdirectory(lang)
    add_definitions(-DLOCALIZE)
endif ()

if (USE_HOME_DIR)
    add_definitions(-DUSE_HOME_DIR)
endif ()

find_program(CCACHE_FOUND ccache)
if (CCACHE_FOUND AND CATA_CCACHE)
    set(CMAKE_C_COMPILER_LAUNCHER ccache)
    set(CMAKE_CXX_COMPILER_LAUNCHER ccache)
    set(CMAKE_C_LINKER_LAUNCHER ccache)
    set(CMAKE_CXX_LINKER_LAUNCHER ccache)
endif ()

add_subdirectory(src)
add_subdirectory(data)
if (NOT MSVC)
    add_subdirectory(src/chkjson)
endif()
add_subdirectory(tests)
if (JSON_FORMAT)
    add_subdirectory(tools/format)
endif()
if (CATA_CLANG_TIDY_PLUGIN OR CATA_CLANG_TIDY_EXECUTABLE)
    add_subdirectory(tools/clang-tidy-plugin)
endif()

configure_file(
        "${CMAKE_CURRENT_SOURCE_DIR}/cmake_uninstall.cmake.in"
        "${CMAKE_CURRENT_BINARY_DIR}/cmake_uninstall.cmake"
        IMMEDIATE @ONLY)

add_custom_target(uninstall
        "${CMAKE_COMMAND}"
        -P "${CMAKE_CURRENT_BINARY_DIR}/cmake_uninstall.cmake")