vcmi/CMakeLists.txt

# Minimum required version greatly affect CMake behavior
# So cmake_minimum_required must be called before the project()
# 3.16.0 is used since it's used by our currently oldest suppored system: Ubuntu-20.04
cmake_minimum_required(VERSION 3.16.0)

project(VCMI)
# TODO
# macOS:
# - There is problem with running fixup_bundle in main project after subdirectories.
# Cmake put them after all install code of main CMakelists in cmake_install.cmake
# Currently I just added extra add_subdirectory and CMakeLists.txt in osx directory to bypass that.
#
# Vckpg:
# - Improve install code once there is better way to deploy DLLs and Qt plugins
#
# Other:
# - Cleanup remove_directory copy_directory if performance will be a problem.
# We can use some macro over copy_if_different since it's only work for single file.
# - Find a way to move add_custom_command for assets deploy out of "lib/CMakeLists.txt"
# - Consider to remove M_DATA_DIR, DM_BIN_DIR, DM_LIB_DIR and not use them in code as well
# - Try to get rid of FOLDER override with define_property
# It's used currently to make sure that 3rd-party dependencies in git submodules get proper FOLDER property
# - Make FindFuzzyLite check for the right version and disable FORCE_BUNDLED_FL by default

if(APPLE)
	if(${CMAKE_SYSTEM_NAME} STREQUAL "Darwin")
		set(APPLE_MACOS 1)
	else()
		set(APPLE_IOS 1)
	endif()
endif()

############################################
#        User-provided options             #
############################################

if(NOT CMAKE_BUILD_TYPE)
	set(CMAKE_BUILD_TYPE RelWithDebInfo CACHE STRING
		"Choose the type of build, options are: Debug Release RelWithDebInfo. Default is RelWithDebInfo."
		FORCE)
	set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS Debug Release RelWithDebInfo)
endif()

set(singleProcess OFF)
set(staticAI OFF)
if(ANDROID)
	set(staticAI ON)
	set(singleProcess ON)
endif()

option(ENABLE_ERM "Enable compilation of ERM scripting module" OFF)
option(ENABLE_LUA "Enable compilation of LUA scripting module" OFF)
if(NOT ANDROID)
	option(ENABLE_LAUNCHER "Enable compilation of launcher" ON)
	option(ENABLE_EDITOR "Enable compilation of map editor" ON)
endif()
option(ENABLE_TRANSLATIONS "Enable generation of translations for launcher and editor" ON)
option(ENABLE_NULLKILLER_AI "Enable compilation of Nullkiller AI library" ON)

if(APPLE_IOS)
	set(BUNDLE_IDENTIFIER_PREFIX "" CACHE STRING "Bundle identifier prefix")
	set(APP_DISPLAY_NAME "VCMI" CACHE STRING "App name on the home screen")
	set(ENABLE_SINGLE_APP_BUILD ON)
else()
	option(ENABLE_TEST "Enable compilation of unit tests" OFF)
	option(ENABLE_SINGLE_APP_BUILD "Builds client and server as single executable" ${singleProcess})
endif()

option(ENABLE_PCH "Enable compilation using precompiled headers" ON)
option(ENABLE_GITVERSION "Enable Version.cpp with Git commit hash" ON)
option(ENABLE_DEBUG_CONSOLE "Enable debug console for Windows builds" ON)
option(ENABLE_STRICT_COMPILATION "Treat all compiler warnings as errors" OFF)
option(ENABLE_MULTI_PROCESS_BUILDS "Enable /MP flag for MSVS solution" ON)
option(COPY_CONFIG_ON_BUILD "Copies config folder into output directory at building phase" ON)
option(ENABLE_STATIC_AI_LIBS "Add AI code into VCMI lib directly" ${staticAI})

# Used for Snap packages and also useful for debugging
if(NOT APPLE_IOS AND NOT ANDROID)
	option(ENABLE_MONOLITHIC_INSTALL "Install everything in single directory on Linux and Mac" OFF)
endif()

# On Linux, use -DCMAKE_CXX_COMPILER_LAUNCHER=ccache instead.
# The XCode and MSVC builds each require some more configuration, which is enabled by the following option:
if(MSVC OR (CMAKE_GENERATOR STREQUAL "Xcode"))
  option(ENABLE_CCACHE "Speed up recompilation by caching previous compilations" OFF)
endif()

if(ENABLE_CCACHE AND (CMAKE_GENERATOR STREQUAL "Xcode"))
	find_program(CCACHE ccache REQUIRED)
	if(CCACHE)
		# https://stackoverflow.com/a/36515503/2278742
		# Set up wrapper scripts
		configure_file(xcode/launch-c.in   xcode/launch-c)
		configure_file(xcode/launch-cxx.in xcode/launch-cxx)
		execute_process(COMMAND chmod a+rx
												"${CMAKE_BINARY_DIR}/xcode/launch-c"
												"${CMAKE_BINARY_DIR}/xcode/launch-cxx")
		# Set Xcode project attributes to route compilation through our scripts
		set(CMAKE_XCODE_ATTRIBUTE_CC         	"${CMAKE_BINARY_DIR}/xcode/launch-c")
		set(CMAKE_XCODE_ATTRIBUTE_CXX        	"${CMAKE_BINARY_DIR}/xcode/launch-cxx")
		set(CMAKE_XCODE_ATTRIBUTE_LD         	"${CMAKE_BINARY_DIR}/xcode/launch-c")
		set(CMAKE_XCODE_ATTRIBUTE_LDPLUSPLUS 	"${CMAKE_BINARY_DIR}/xcode/launch-cxx")
	endif()
endif()

# Allow to pass package name from Travis CI
set(PACKAGE_NAME_SUFFIX "" CACHE STRING "Suffix for CPack package name")
set(PACKAGE_FILE_NAME "" CACHE STRING "Override for CPack package filename")

# ERM depends on LUA implicitly
if(ENABLE_ERM AND NOT ENABLE_LUA)
	set(ENABLE_LUA ON)
endif()

# We don't want to deploy assets into build directory for android/iOS build
if((APPLE_IOS OR ANDROID) AND COPY_CONFIG_ON_BUILD)
	set(COPY_CONFIG_ON_BUILD OFF)
endif()

############################################
#        Miscellaneous options             #
############################################

set(CMAKE_MODULE_PATH ${CMAKE_HOME_DIRECTORY}/cmake_modules ${PROJECT_SOURCE_DIR}/CI)
# Contains custom functions and macros, but don't altering any options

include(VCMIUtils)
include(VersionDefinition)
if(ANDROID)
	set(VCMI_VERSION "${APP_SHORT_VERSION}")
	configure_file("android/GeneratedVersion.java.in" "${CMAKE_SOURCE_DIR}/android/vcmi-app/src/main/java/eu/vcmi/vcmi/util/GeneratedVersion.java" @ONLY)
endif()

vcmi_print_important_variables()

# Options to enable folders in CMake generated projects for Visual Studio, Xcode, etc
# Very useful to put 3rd-party libraries such as Minizip, GoogleTest and FuzzyLite in their own folders
set_property(GLOBAL PROPERTY USE_FOLDERS TRUE)
# Make FOLDER property inheritable
# So when we set FOLDER property on AI directory all and targets inside will inherit it
#
# Important! This trick depend on undefined behavior since we override CMake own property.
# In same time define_property documentation states it's function for custom properties.
define_property(
	TARGET
	PROPERTY FOLDER
	INHERITED
	BRIEF_DOCS "Set the folder name."
	FULL_DOCS  "Use to organize targets in an IDE."
)

# Generate Version.cpp
if(ENABLE_GITVERSION)
	add_custom_target(update_version ALL
		BYPRODUCTS "Version.cpp"
		COMMAND ${CMAKE_COMMAND} -DGIT_SHA1="${GIT_SHA1}" -P "${PROJECT_SOURCE_DIR}/cmake_modules/Version.cmake"
	)
else()
	add_definitions(-DVCMI_NO_EXTRA_VERSION)
endif(ENABLE_GITVERSION)

# Precompiled header configuration
if (CMAKE_CXX_COMPILER_ID STREQUAL "GNU" AND CMAKE_CXX_COMPILER_VERSION VERSION_LESS 6.0 )
	set(ENABLE_PCH OFF) # broken
endif()

if(ENABLE_PCH)
	macro(enable_pch name)
		target_precompile_headers(${name} PRIVATE $<$<COMPILE_LANGUAGE:CXX>:<StdInc.h$<ANGLE-R>>)
	endmacro(enable_pch)
else()
	macro(enable_pch ignore)
	endmacro(enable_pch)
endif()

############################################
#        Documentation section             #
############################################

include(UseDoxygen OPTIONAL)

############################################
#        Compile and linking options       #
############################################

#Enable C++17 Globally
set (CMAKE_CXX_STANDARD 17)
#General visibility options
set(CMAKE_CXX_VISIBILITY_PRESET hidden)
set(CMAKE_VISIBILITY_INLINES_HIDDEN 1)

#Global fallback mapping
# RelWithDebInfo falls back to Release, then MinSizeRel, and then to None (tbb in 22.04 requires it)
set(CMAKE_MAP_IMPORTED_CONFIG_RELWITHDEBINFO RelWithDebInfo Release MinSizeRel None "")
# MinSizeRel falls back to Release, then RelWithDebInfo, and then to None (tbb in 22.04 requires it)
set(CMAKE_MAP_IMPORTED_CONFIG_MINSIZEREL MinSizeRel Release RelWithDebInfo None "")
# Release falls back to RelWithDebInfo, then MinSizeRel, and then to None (tbb in 22.04 requires it)
set(CMAKE_MAP_IMPORTED_CONFIG_RELEASE Release RelWithDebInfo MinSizeRel None "")

set(CMAKE_XCODE_ATTRIBUTE_APP_DISPLAY_NAME ${APP_DISPLAY_NAME})
set(CMAKE_XCODE_ATTRIBUTE_CLANG_ENABLE_OBJC_ARC YES)
set(CMAKE_XCODE_ATTRIBUTE_DEBUG_INFORMATION_FORMAT[variant=Debug] dwarf)
set(CMAKE_XCODE_ATTRIBUTE_ENABLE_BITCODE NO)
set(CMAKE_XCODE_ATTRIBUTE_ENABLE_NS_ASSERTIONS NO)
set(CMAKE_XCODE_ATTRIBUTE_ENABLE_NS_ASSERTIONS[variant=Debug] YES)
set(CMAKE_XCODE_ATTRIBUTE_GCC_WARN_64_TO_32_BIT_CONVERSION NO)
set(CMAKE_XCODE_ATTRIBUTE_MARKETING_VERSION ${APP_SHORT_VERSION})
set(CMAKE_XCODE_ATTRIBUTE_ONLY_ACTIVE_ARCH NO)
set(CMAKE_XCODE_ATTRIBUTE_ONLY_ACTIVE_ARCH[variant=Debug] YES)

#Check for endian
if(${CMAKE_VERSION} VERSION_LESS "3.20.0") 
	include(TestBigEndian)
	test_big_endian(VCMI_ENDIAN_BIG)
	if(VCMI_ENDIAN_BIG)
		add_definitions(-DVCMI_ENDIAN_BIG)
	endif()
elseif(${CMAKE_CXX_BYTE_ORDER} EQUAL "BIG_ENDIAN")
	add_definitions(-DVCMI_ENDIAN_BIG)
endif()


if(ENABLE_LAUNCHER)
	add_definitions(-DENABLE_LAUNCHER)
endif()

if(ENABLE_EDITOR)
	add_definitions(-DENABLE_EDITOR)
endif()

if(ENABLE_SINGLE_APP_BUILD)
	add_definitions(-DSINGLE_PROCESS_APP=1)
endif()

if(APPLE_IOS)
	set(CMAKE_MACOSX_RPATH 1)
	set(CMAKE_OSX_DEPLOYMENT_TARGET 12.0)

	if(NOT USING_CONAN)
		list(APPEND CMAKE_FIND_ROOT_PATH "${CMAKE_PREFIX_PATH}") # required for Boost
		set(CMAKE_FIND_USE_CMAKE_ENVIRONMENT_PATH FALSE)
		set(CMAKE_FIND_USE_SYSTEM_ENVIRONMENT_PATH FALSE)
	endif()

	set(CMAKE_XCODE_ATTRIBUTE_CODE_SIGNING_ALLOWED NO)
	set(CMAKE_XCODE_ATTRIBUTE_CODE_SIGNING_ALLOWED_FOR_APPS YES)
	set(CMAKE_XCODE_ATTRIBUTE_PRODUCT_BUNDLE_IDENTIFIER "${BUNDLE_IDENTIFIER_PREFIX}.$(PRODUCT_NAME)")
	set(CMAKE_XCODE_ATTRIBUTE_TARGETED_DEVICE_FAMILY "1,2")
endif()

if(APPLE_MACOS)
	# Not supported by standard library of our current minimal target - macOS 10.14 or newer required
	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-aligned-allocation")
endif()

if(MINGW OR MSVC)
	# Windows Vista or newer for FuzzyLite 6 to compile
	add_definitions(-D_WIN32_WINNT=0x0600)

	#delete lib prefix for dlls (libvcmi -> vcmi)
	set(CMAKE_SHARED_LIBRARY_PREFIX "")

	if(MSVC)
		if(ENABLE_CCACHE)
			# https://github.com/ccache/ccache/discussions/1154#discussioncomment-3611387
			find_program(CCACHE ccache REQUIRED)
			if (CCACHE)
				file(COPY_FILE
					${CCACHE} ${CMAKE_BINARY_DIR}/cl.exe
					ONLY_IF_DIFFERENT)

				set(CMAKE_VS_GLOBALS
					"CLToolExe=cl.exe"
					"CLToolPath=${CMAKE_BINARY_DIR}"
					"TrackFileAccess=false"
					"UseMultiToolTask=true"
				)
			endif()
		endif()

		add_definitions(-DBOOST_ALL_NO_LIB)
		add_definitions(-DBOOST_ALL_DYN_LINK)
		set(Boost_USE_STATIC_LIBS OFF)

		# Don't link with SDLMain
		if(ENABLE_DEBUG_CONSOLE)
			set(SDL2_BUILDING_LIBRARY ON)
			add_definitions(-DVCMI_WITH_DEBUG_CONSOLE)
		endif()

		# Suppress warnings
		add_definitions(-D_CRT_SECURE_NO_WARNINGS)
		add_definitions(-D_SCL_SECURE_NO_WARNINGS)
		add_definitions(-D_SILENCE_TR1_NAMESPACE_DEPRECATION_WARNING) # Fix gtest and gmock build

		set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /utf-8")
		set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /bigobj")
		set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /wd4250") # 4250: 'class1' : inherits 'class2::member' via dominance
		set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /wd4251") # 4251: class 'xxx' needs to have dll-interface to be used by clients of class 'yyy'
		set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /wd4244") # 4244: conversion from 'xxx' to 'yyy', possible loss of data
		set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /wd4267") # 4267: conversion from 'xxx' to 'yyy', possible loss of data
		set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /wd4275") # 4275: non dll-interface class 'xxx' used as base for dll-interface class
		#set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /wd4800") # 4800: implicit conversion from 'xxx' to bool. Possible information loss

		if(ENABLE_STRICT_COMPILATION)
			set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /WX") # Treats all compiler warnings as errors
		endif()

		if(ENABLE_MULTI_PROCESS_BUILDS)
			set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /MP")
		endif()

		# Workaround: Visual Studio has issues with exports of classes that inherit templates
		# https://stackoverflow.com/questions/44960760/msvc-dll-exporting-class-that-inherits-from-template-cause-lnk2005-already-defin
		# Reported to Microsoft here:
		# https://developercommunity.visualstudio.com/content/problem/224597/linker-failing-because-of-multiple-definitions-of.html
		set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} /FORCE:MULTIPLE")

		# Required at least for compatibility with Boost 1.68 on Vcpkg
		set(SYSTEM_LIBS ${SYSTEM_LIBS} bcrypt)
	endif(MSVC)

	if(MINGW)

		# Temporary (?) workaround for failing builds on MinGW CI due to bug in TBB
		set(CMAKE_CXX_EXTENSIONS ON)

		set(SYSTEM_LIBS ${SYSTEM_LIBS} ole32 oleaut32 ws2_32 mswsock dbghelp bcrypt)

		# Check for iconv (may be needed for Boost.Locale)
		include(CheckLibraryExists)
		check_library_exists(iconv libiconv_open "" ICONV_FOUND)
		if(ICONV_FOUND)
			set(SYSTEM_LIBS ${SYSTEM_LIBS} iconv)
		endif()

		# Prevent compiler issues when building Debug
		# Assembler might fail with "too many sections"
		# With big-obj or 64-bit build will take hours
		if(CMAKE_BUILD_TYPE MATCHES Debug)
			set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Og")
		endif()
	endif(MINGW)
endif(MINGW OR MSVC)

if(ANDROID)
	if(ANDROID_NDK_MAJOR LESS 23 AND ANDROID_ABI MATCHES "^armeabi")
		# libunwind must come before other shared libs:
		# https://android.googlesource.com/platform/ndk/+/master/docs/BuildSystemMaintainers.md#Unwinding
		list(APPEND SYSTEM_LIBS unwind)
	endif()
	list(APPEND SYSTEM_LIBS log)
endif()

if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU" OR NOT WIN32)
	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra")
	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wpointer-arith")
	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wuninitialized")

	if (CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 10.0 OR CMAKE_CXX_COMPILER_ID STREQUAL "Clang" )
		set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wmismatched-tags")
	endif()

	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-unused-parameter")   # low chance of valid reports, a lot of emitted warnings
	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-switch")             # large number of false-positives, disabled
	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-reorder")            # large number of noise, low chance of any significant issues
	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-sign-compare")       # low chance of any significant issues
	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-varargs")            # emitted in fuzzylite headers, disabled

	if(ENABLE_STRICT_COMPILATION)
		set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Werror")
		set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-error=array-bounds") # false positives in boost::multiarray during release build, keep as warning-only
	endif()

	# Fix string inspection with lldb
	# https://stackoverflow.com/questions/58578615/cannot-inspect-a-stdstring-variable-in-lldb
	if(CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
		set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -fstandalone-debug")
	endif()

	if(UNIX)
		set(SYSTEM_LIBS ${SYSTEM_LIBS} ${CMAKE_DL_LIBS})
	endif()
endif()

# Check if some platform-specific libraries are needed for linking
if(NOT WIN32 AND NOT APPLE_IOS)
	include(CheckLibraryExists)

	# Shared memory functions used by Boost.Interprocess
	# FindBoost handle linking with pthreads, but doesn't handle this
	CHECK_LIBRARY_EXISTS(rt shm_open "" HAVE_RT_LIB)
	if(HAVE_RT_LIB)
		set(SYSTEM_LIBS ${SYSTEM_LIBS} rt)
	endif()
	if(HAIKU)
		set(SYSTEM_LIBS ${SYSTEM_LIBS} network)
	endif()
endif()

if(ENABLE_LUA)
	add_definitions(-DSCRIPTING_ENABLED=1)
endif()

if(USING_CONAN AND (MINGW AND CMAKE_HOST_UNIX))
	# Hack for workaround https://github.com/conan-io/conan-center-index/issues/15405
	# Remove once it will be fixed
	execute_process(COMMAND
		bash -c "grep -rl Mf ${CONAN_INSTALL_FOLDER} | xargs sed -i 's/Mf/mf/g'"
	)
	# Hack for workaround ffmpeg broken linking (conan ffmpeg forgots to link to ws2_32)
	# Remove once it will be fixed
	execute_process(COMMAND
		bash -c "grep -rl secur32 ${CONAN_INSTALL_FOLDER} | xargs sed -i 's/secur32)/secur32 ws2_32)/g'"
	)
	execute_process(COMMAND
		bash -c "grep -rl secur32 ${CONAN_INSTALL_FOLDER} | xargs sed -i 's/secur32 mfplat/secur32 ws2_32 mfplat/g'"
	)
	# Fixup tbb for cross-compiling on Conan
	# Remove once it will be fixed
	execute_process(COMMAND
		bash -c "grep -rl tbb12 ${CONAN_INSTALL_FOLDER} | xargs sed -i 's/tbb tbb12/tbb12/g'"
	)
endif()

############################################
#        Finding packages                  #
############################################

find_package(Boost 1.48.0 REQUIRED COMPONENTS date_time filesystem locale program_options system thread)

find_package(ZLIB REQUIRED)
# Conan compatibility
if(TARGET zlib::zlib)
	add_library(ZLIB::ZLIB ALIAS zlib::zlib)
endif()

set(FFMPEG_COMPONENTS avutil swscale avformat avcodec)
if(APPLE_IOS AND NOT USING_CONAN)
	list(APPEND FFMPEG_COMPONENTS swresample)
endif()
find_package(ffmpeg COMPONENTS ${FFMPEG_COMPONENTS})

option(FORCE_BUNDLED_MINIZIP "Force bundled Minizip library" OFF)
if(NOT FORCE_BUNDLED_MINIZIP)
	find_package(minizip)
	if(TARGET minizip::minizip)
		add_definitions(-DUSE_SYSTEM_MINIZIP)
	endif()
endif()

find_package(SDL2 REQUIRED)
find_package(SDL2_image REQUIRED)
if(TARGET SDL2_image::SDL2_image)
	add_library(SDL2::Image ALIAS SDL2_image::SDL2_image)
endif()
find_package(SDL2_mixer REQUIRED)
if(TARGET SDL2_mixer::SDL2_mixer)
	add_library(SDL2::Mixer ALIAS SDL2_mixer::SDL2_mixer)
endif()
find_package(SDL2_ttf REQUIRED)
if(TARGET SDL2_ttf::SDL2_ttf)
	add_library(SDL2::TTF ALIAS SDL2_ttf::SDL2_ttf)
endif()

if(ENABLE_LAUNCHER OR ENABLE_EDITOR)
	# Widgets finds its own dependencies (QtGui and QtCore).
	find_package(QT NAMES Qt6 Qt5 REQUIRED COMPONENTS Widgets Network)
	find_package(Qt${QT_VERSION_MAJOR} REQUIRED COMPONENTS Widgets Network)

	if(ENABLE_TRANSLATIONS)
		find_package(Qt${QT_VERSION_MAJOR} REQUIRED COMPONENTS LinguistTools)
		add_definitions(-DENABLE_QT_TRANSLATIONS)
	endif()
endif()

if(ENABLE_NULLKILLER_AI)
	find_package(TBB REQUIRED)
endif()

if(ENABLE_LUA)
	find_package(luajit)

	if(TARGET luajit::luajit)
		message(STATUS "Using LuaJIT provided by system")
	else()
		message(STATUS "Cannot find LuaJIT! Fallback to using usual Lua.")
		find_package(Lua REQUIRED)
		if(Lua_FOUND)
			add_library(luajit::luajit UNKNOWN IMPORTED)
			set_target_properties(luajit::luajit PROPERTIES
				INTERFACE_INCLUDE_DIRECTORIES "${LUA_INCLUDE_DIR}")
			set_target_properties(luajit::luajit PROPERTIES
				IMPORTED_LOCATION "${LUA_LIBRARIES}")
		endif()
	endif()
endif()

############################################
#        Output directories                #
############################################

if(WIN32) # on Win everything goes into H3 root directory
	set(BIN_DIR "." CACHE STRING "Where to install binaries")
	set(LIB_DIR "." CACHE STRING "Where to install main library")
	set(DATA_DIR "." CACHE STRING "Where to install data files")
elseif(APPLE)
	# includes lib path which determines where to install shared libraries (either /lib or /lib64)
	include(GNUInstallDirs)

	set(CMAKE_INSTALL_RPATH "@executable_path/../Frameworks")
	if(ENABLE_MONOLITHIC_INSTALL)
		set(BIN_DIR "." CACHE STRING "Where to install binaries")
		set(LIB_DIR "." CACHE STRING "Where to install main library")
		set(DATA_DIR "." CACHE STRING "Where to install data files")
	else()
		if(APPLE_MACOS)
			set(APP_BUNDLE_DIR "${CMAKE_PROJECT_NAME}.app")
			set(APP_BUNDLE_CONTENTS_DIR "${APP_BUNDLE_DIR}/Contents")
			set(APP_BUNDLE_BINARY_DIR "${APP_BUNDLE_CONTENTS_DIR}/MacOS")
			set(APP_BUNDLE_RESOURCES_DIR "${APP_BUNDLE_CONTENTS_DIR}/Resources")

			set(BIN_DIR "${APP_BUNDLE_BINARY_DIR}" CACHE STRING "Where to install binaries")
			set(LIB_DIR "${APP_BUNDLE_CONTENTS_DIR}/Frameworks" CACHE STRING "Where to install main library")
			set(DATA_DIR "${APP_BUNDLE_RESOURCES_DIR}/Data" CACHE STRING "Where to install data files")
		else()
			set(LIB_DIR "Frameworks")
			set(DATA_DIR ".")
		endif()
	endif()
elseif(ANDROID)
	include(GNUInstallDirs)
	set(LIB_DIR "jniLibs/${ANDROID_ABI}")
	set(DATA_DIR "assets")
else()
	# includes lib path which determines where to install shared libraries (either /lib or /lib64)
	include(GNUInstallDirs)

	if(ENABLE_MONOLITHIC_INSTALL)
		set(BIN_DIR "." CACHE STRING "Where to install binaries")
		set(LIB_DIR "." CACHE STRING "Where to install main library")
		set(DATA_DIR "." CACHE STRING "Where to install data files")

		# following constants only used for platforms using XDG (Linux, BSD, etc)
		add_definitions(-DM_DATA_DIR="${DATA_DIR}")
		add_definitions(-DM_BIN_DIR="${BIN_DIR}")
		add_definitions(-DM_LIB_DIR="${LIB_DIR}")

		set(CMAKE_INSTALL_RPATH "$ORIGIN/")
	else()
		if(NOT BIN_DIR)
			set(BIN_DIR "${CMAKE_INSTALL_BINDIR}" CACHE STRING "Where to install binaries")
		endif()
		if(NOT LIB_DIR)
			set(LIB_DIR "${CMAKE_INSTALL_LIBDIR}/vcmi" CACHE STRING "Where to install main library")
		endif()
		if(NOT DATA_DIR)
			set(DATA_DIR "${CMAKE_INSTALL_DATAROOTDIR}/vcmi" CACHE STRING "Where to install data files")
		endif()

		# following constants only used for platforms using XDG (Linux, BSD, etc)
		add_definitions(-DM_DATA_DIR="${CMAKE_INSTALL_PREFIX}/${DATA_DIR}")
		add_definitions(-DM_BIN_DIR="${CMAKE_INSTALL_PREFIX}/${BIN_DIR}")
		add_definitions(-DM_LIB_DIR="${CMAKE_INSTALL_PREFIX}/${LIB_DIR}")

		set(CMAKE_INSTALL_RPATH "${CMAKE_INSTALL_PREFIX}/${LIB_DIR}")
	endif()
endif()

# iOS/Android have flat libs directory structure
if(APPLE_IOS OR ANDROID)
	set(AI_LIB_DIR "${LIB_DIR}")
	set(SCRIPTING_LIB_DIR "${LIB_DIR}")
else()
	set(AI_LIB_DIR "${LIB_DIR}/AI")
	set(SCRIPTING_LIB_DIR "${LIB_DIR}/scripting")
endif()

#######################################
#        Add subdirectories           #
#######################################

if(APPLE_IOS)
	add_subdirectory(ios)
endif()

set(VCMI_LIB_TARGET vcmi)
add_subdirectory_with_folder("AI" AI)

include(VCMI_lib)
add_subdirectory(lib)
if(ENABLE_SINGLE_APP_BUILD)
	add_subdirectory(lib_server)
endif()

if(ENABLE_ERM)
	add_subdirectory(scripting/erm)
endif()
if(ENABLE_LUA)
	add_subdirectory(scripting/lua)
endif()
if(NOT TARGET minizip::minizip)
	add_subdirectory_with_folder("3rdparty" lib/minizip)
	add_library(minizip::minizip ALIAS minizip)
endif()

if(ENABLE_LAUNCHER)
	add_subdirectory(launcher)
endif()
if(ENABLE_EDITOR)
	add_subdirectory(mapeditor)
endif()
add_subdirectory(client)
add_subdirectory(server)
if(ENABLE_TEST)
	enable_testing()
	add_subdirectory(test)
endif()

#######################################
#        Installation section         #
#######################################

if(ANDROID)
	if(ANDROID_STL MATCHES "_shared$")
		set(stlLibName "${CMAKE_SHARED_LIBRARY_PREFIX}${ANDROID_STL}${CMAKE_SHARED_LIBRARY_SUFFIX}")
		install(FILES "${CMAKE_SYSROOT}/usr/lib/${ANDROID_SYSROOT_LIB_SUBDIR}/${stlLibName}"
			DESTINATION ${LIB_DIR}
		)
	endif()

	# zip internal assets - 'config' and 'Mods' dirs, save md5 of the zip
	install(CODE "
		cmake_path(ABSOLUTE_PATH CMAKE_INSTALL_PREFIX
			OUTPUT_VARIABLE absolute_install_prefix
		)
		set(absolute_data_dir \"\${absolute_install_prefix}/${DATA_DIR}\")
		file(MAKE_DIRECTORY \"\${absolute_data_dir}\")

		set(internal_data_zip \"\${absolute_data_dir}/internalData.zip\")
		execute_process(COMMAND
			\"${CMAKE_COMMAND}\" -E tar c \"\${internal_data_zip}\" --format=zip -- config Mods
			WORKING_DIRECTORY \"${CMAKE_SOURCE_DIR}\"
		)

		file(MD5 \"\${internal_data_zip}\" internal_data_zip_md5)
		file(WRITE \"\${absolute_data_dir}/internalDataHash.txt\"
			\${internal_data_zip_md5}
		)
	")
else()
	install(DIRECTORY config DESTINATION ${DATA_DIR})
	install(DIRECTORY Mods DESTINATION ${DATA_DIR})
endif()
if(ENABLE_LUA)
	install(DIRECTORY scripts DESTINATION ${DATA_DIR})
endif()

# that script is useless for Windows / iOS / Android
if(NOT WIN32 AND NOT APPLE_IOS AND NOT ANDROID)
	install(FILES vcmibuilder DESTINATION ${BIN_DIR} PERMISSIONS
		OWNER_WRITE OWNER_READ OWNER_EXECUTE
					GROUP_READ GROUP_EXECUTE
					WORLD_READ WORLD_EXECUTE)
endif()


if(WIN32)
	if(USING_CONAN)
		#Conan imports enabled
		vcmi_install_conan_deps("\${CMAKE_INSTALL_PREFIX}")
		file(GLOB dep_files
				${dep_files}
				"${CMAKE_SYSROOT}/bin/*.dll" 
				"${CMAKE_SYSROOT}/lib/*.dll" 
				"${CONAN_SYSTEM_LIBRARY_LOCATION}/*.dll")
	else()
		file(GLOB dep_files
				${dep_files}
				"${CMAKE_FIND_ROOT_PATH}/bin/*.dll")
	endif()

	if(CMAKE_BUILD_TYPE MATCHES Debug)
		# Copy debug versions of libraries if build type is debug
		set(debug_postfix d)
	endif()

	if(ENABLE_LAUNCHER OR ENABLE_EDITOR)
		get_target_property(QtCore_location Qt${QT_VERSION_MAJOR}::Core LOCATION)
		get_filename_component(Qtbin_folder ${QtCore_location} PATH)
		file(GLOB dep_files
			${dep_files}
			${Qtbin_folder}/Qt5Core${debug_postfix}.dll
			${Qtbin_folder}/Qt5Gui${debug_postfix}.dll
			${Qtbin_folder}/Qt5Widgets${debug_postfix}.dll
			${Qtbin_folder}/Qt5Network${debug_postfix}.dll
			${Qtbin_folder}/icu*.dll)
		get_target_property(integration_type Qt${QT_VERSION_MAJOR}::QWindowsIntegrationPlugin TYPE)
		if(NOT(integration_type STREQUAL "INTERFACE_LIBRARY"))
			get_target_property(integration_loc Qt${QT_VERSION_MAJOR}::QWindowsIntegrationPlugin LOCATION)
			install(
				FILES ${integration_loc}
				DESTINATION ${BIN_DIR}/platforms
			)
			install(
				FILES "$<TARGET_FILE:Qt${QT_VERSION_MAJOR}::QWindowsVistaStylePlugin>" 
				DESTINATION ${BIN_DIR}/styles) 
		endif()
	endif()

	install(FILES ${dep_files} DESTINATION ${BIN_DIR})
endif(WIN32)

#######################################
#       Packaging section             #
#######################################

if(MSVC)
	SET(CMAKE_INSTALL_SYSTEM_RUNTIME_DESTINATION ${BIN_DIR})
	Include(InstallRequiredSystemLibraries)
endif()

set(CPACK_PACKAGE_VERSION_MAJOR ${VCMI_VERSION_MAJOR})
set(CPACK_PACKAGE_VERSION_MINOR ${VCMI_VERSION_MINOR})
set(CPACK_PACKAGE_VERSION_PATCH ${VCMI_VERSION_PATCH})

# vcmi does not have "patch version" in version string
set(CPACK_PACKAGE_VERSION "${CPACK_PACKAGE_VERSION_MAJOR}.${CPACK_PACKAGE_VERSION_MINOR}")
#TODO: remove version from Global.h and use this one as define?

set(CPACK_INCLUDE_TOPLEVEL_DIRECTORY 0)

if("${PACKAGE_NAME_SUFFIX}" STREQUAL "")
	set(CPACK_PACKAGE_NAME "VCMI")
else()
	set(CPACK_PACKAGE_NAME "VCMI ${PACKAGE_NAME_SUFFIX}")
endif()
if("${PACKAGE_FILE_NAME}" STREQUAL "")
	set(CPACK_PACKAGE_FILE_NAME "vcmi-${CPACK_PACKAGE_VERSION}")
else()
	set(CPACK_PACKAGE_FILE_NAME "${PACKAGE_FILE_NAME}")
endif()
set(CPACK_PACKAGE_VENDOR "VCMI team")

if(WIN32)
	# Note: due to NSI script generation process all of the backward slashes here are useful
	set(CPACK_MONOLITHIC_INSTALL 1)
	set(CPACK_RESOURCE_FILE_LICENSE "${CMAKE_SOURCE_DIR}/license.txt")
	set(CPACK_PACKAGE_INSTALL_DIRECTORY "${CPACK_PACKAGE_NAME}")
	if("${PACKAGE_NAME_SUFFIX}" STREQUAL "")
		set(CPACK_NSIS_PACKAGE_NAME "VCMI ${CPACK_PACKAGE_VERSION}")
	else()
		set(CPACK_NSIS_PACKAGE_NAME "VCMI ${CPACK_PACKAGE_VERSION} ${PACKAGE_NAME_SUFFIX} ")
	endif()
	if(CMAKE_SYSTEM_PROCESSOR MATCHES ".*64")
		set(CPACK_NSIS_INSTALL_ROOT "$PROGRAMFILES64")
	else()
		set(CPACK_NSIS_INSTALL_ROOT "$PROGRAMFILES")
	endif()

	if(ENABLE_LAUNCHER)
		set(VCMI_MAIN_EXECUTABLE "VCMI_launcher")
	else()
		set(VCMI_MAIN_EXECUTABLE "VCMI_client")
	endif()
	set(CPACK_PACKAGE_EXECUTABLES "${VCMI_MAIN_EXECUTABLE};VCMI")
	set(CPACK_NSIS_EXTRA_INSTALL_COMMANDS "
		CreateShortCut \\\"$DESKTOP\\\\VCMI.lnk\\\" \\\"$INSTDIR\\\\${VCMI_MAIN_EXECUTABLE}.exe\\\"
		ExecShell '' 'netsh' 'advfirewall firewall add rule name=vcmi_server dir=in action=allow program=\\\"$INSTDIR\\\\vcmi_server.exe\\\" enable=yes profile=public,private' SW_HIDE
	")
	set(CPACK_NSIS_EXTRA_UNINSTALL_COMMANDS "
		Delete \\\"$DESKTOP\\\\VCMI.lnk\\\"
		ExecShell '' 'netsh' 'advfirewall firewall delete rule name=vcmi_server' SW_HIDE
	")

	# Strip MinGW CPack target if build configuration without debug info
	if(MINGW)
		if(NOT (CMAKE_BUILD_TYPE STREQUAL "Debug") OR (CMAKE_BUILD_TYPE STREQUAL "RelWithDebInfo"))
			set(CPACK_STRIP_FILES ON)
		endif()
	endif()
	# set the install/unistall icon used for the installer itself
	# There is a bug in NSI that does not handle full unix paths properly.
	set(CPACK_NSIS_MUI_ICON "${CMAKE_CURRENT_SOURCE_DIR}/client\\\\vcmi.ico")
	set(CPACK_NSIS_MUI_UNIICON "${CMAKE_CURRENT_SOURCE_DIR}/client\\\\vcmi.ico")
	# set the package header icon for MUI
	set(CPACK_PACKAGE_ICON "${CMAKE_SOURCE_DIR}/client\\\\vcmi.ico")

	set(CPACK_NSIS_MENU_LINKS "http://vcmi.eu/" "VCMI Web Site")

	set(CPACK_NSIS_INSTALLED_ICON_NAME "VCMI_client.exe")
	set(CPACK_NSIS_COMPRESSOR "/SOLID lzma")
	set(CPACK_NSIS_DISPLAY_NAME "${CPACK_NSIS_PACKAGE_NAME}, open-source engine for Heroes of Might and Magic III ")
	set(CPACK_NSIS_HELP_LINK "http://vcmi.eu/")
	set(CPACK_NSIS_URL_INFO_ABOUT "http://vcmi.eu/")
	set(CPACK_NSIS_CONTACT @CPACK_PACKAGE_CONTACT@)
	set(CPACK_NSIS_EXECUTABLES_DIRECTORY ".")
	# Use BundleUtilities to fix build when Vcpkg is used and disable it for mingw
	if(NOT (${CMAKE_CROSSCOMPILING}))
		add_subdirectory(win)
	endif()
elseif(APPLE_MACOS AND NOT ENABLE_MONOLITHIC_INSTALL)
	set(CPACK_MONOLITHIC_INSTALL 1)
	set(CPACK_GENERATOR "DragNDrop")
	set(CPACK_DMG_BACKGROUND_IMAGE "${CMAKE_SOURCE_DIR}/osx/dmg_background.png")
	# CMake code for CPACK_DMG_DS_STORE executed before DS_STORE_SETUP_SCRIPT
	# So we can keep both enabled and this shouldn't hurt
	# set(CPACK_DMG_DS_STORE "${CMAKE_SOURCE_DIR}/osx/dmg_DS_Store")
	set(CPACK_DMG_DS_STORE_SETUP_SCRIPT "${CMAKE_SOURCE_DIR}/osx/DS_Store_Setup.scpt")

	# Always use "VCMI" as volume name so full path will be /Volumes/VCMI/
	# Otherwise DMG background image wouldn't work
	# Pre-generated DS_Store use absolute path to background image
	set(CPACK_DMG_VOLUME_NAME "${CMAKE_PROJECT_NAME}")

	include(GetGitRevisionDescription)
	get_git_head_revision(GIT_REFSPEC GIT_SHA1)
	string(TIMESTAMP CURRENT_YEAR "%Y")

	set(MACOSX_BUNDLE_NAME "${CMAKE_PROJECT_NAME}")
	set(MACOSX_BUNDLE_BUNDLE_NAME "${CMAKE_PROJECT_NAME}")
	set(MACOSX_BUNDLE_COPYRIGHT "Copyright © 2007-${CURRENT_YEAR} VCMI team")
	set(MACOSX_BUNDLE_GUI_IDENTIFIER "eu.vcmi.vcmi")
	set(MACOSX_BUNDLE_BUNDLE_VERSION ${GIT_SHA1})
	set(MACOSX_BUNDLE_SHORT_VERSION_STRING ${APP_SHORT_VERSION})
	if(ENABLE_LAUNCHER)
		set(MACOSX_BUNDLE_EXECUTABLE_NAME "vcmilauncher")
	else()
		set(MACOSX_BUNDLE_EXECUTABLE_NAME "vcmiclient")
	endif()
	set(MACOSX_BUNDLE_ICON_FILE "vcmi.icns")

	install(FILES "${CMAKE_SOURCE_DIR}/osx/vcmi.icns" DESTINATION ${APP_BUNDLE_RESOURCES_DIR})

	configure_file("${CMAKE_SOURCE_DIR}/osx/Info.plist.in" "${CMAKE_BINARY_DIR}/Info.plist")
	install(FILES "${CMAKE_BINARY_DIR}/Info.plist" DESTINATION ${APP_BUNDLE_CONTENTS_DIR})

	# Bundle fixing code must be in separate directory to be executed after all other install code
	add_subdirectory(osx)
elseif(APPLE_IOS)
	set(CPACK_GENERATOR ZIP)
	set(CPACK_ARCHIVE_FILE_EXTENSION ipa)
	set(CPACK_INCLUDE_TOPLEVEL_DIRECTORY OFF)
	set(CPACK_INSTALL_CMAKE_PROJECTS "${CMAKE_CURRENT_BINARY_DIR};${CMAKE_PROJECT_NAME};app;/")
else()
	set(CPACK_GENERATOR TGZ)
endif()

include(CPack)