CMakeLists.txt

cmake_minimum_required(VERSION 3.3)


set(CMAKE_MODULES_SPRING "${CMAKE_CURRENT_SOURCE_DIR}/rts/build/cmake")
list(APPEND CMAKE_MODULE_PATH "${CMAKE_MODULES_SPRING}")

# enable flag overrides for compilers
set(CMAKE_USER_MAKE_RULES_OVERRIDE "${CMAKE_MODULES_SPRING}/OverrideFlags.cmake")

project(Spring)

# dummy so that qtcreator shows all files (even those of windows)
if(CMAKE_VERSION VERSION_GREATER 3.1.2)
	add_library(platform_sources EXCLUDE_FROM_ALL "")
endif ()

# includes rts/build/cmake/Util.cmake & rts/build/cmake/PreferStaticLibs.cmake
include(Util)
include(PreferStaticLibs)

# check for minimal gcc version
set(MIN_GCC_VER "7.0")
if(${CMAKE_CXX_COMPILER_ID} STREQUAL "GNU")
	if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS "${MIN_GCC_VER}")
		message(FATAL_ERROR "gcc >=${MIN_GCC_VER} required")
	else ()
		message(STATUS "gcc ${CMAKE_CXX_COMPILER_VERSION} detected")
	endif ()
endif ()

# set some internal vars

if (NOT "${CMAKE_C_FLAGS}" STREQUAL "")
	message(WARNING "Using custom C_FLAGS: ${CMAKE_C_FLAGS} this build will very likely not sync in online mode!")
endif ()

if (NOT "${CMAKE_CXX_FLAGS}" STREQUAL "")
	message(WARNING "Using custom CXX_FLAGS: ${CMAKE_CXX_FLAGS} this build will very likely not sync in online mode!")
endif ()

set (CUSTOM_COMPILER_DEFINITIONS "" CACHE STRING "Custom flags can be defined here")
if    (CUSTOM_COMPILER_DEFINITIONS)
	add_definitions(${CUSTOM_COMPILER_DEFINITIONS})
endif ()


### set the default build type
if    (NOT CMAKE_BUILD_TYPE)
	set(CMAKE_BUILD_TYPE RELWITHDEBINFO CACHE STRING
		"Choose the type of build, options are: RELWITHDEBINFO DEBUG RELEASE"
		FORCE)
endif ()

string(TOUPPER ${CMAKE_BUILD_TYPE} CMAKE_BUILD_TYPE_UPPER)
if(${CMAKE_BUILD_TYPE_UPPER} MATCHES "^DEBUG")
	set(DEBUG_BUILD TRUE)
else ()
	set(DEBUG_BUILD FALSE)
endif ()

if(DEBUG_BUILD)
	set(JAVA_COMPILE_FLAG_CONDITIONAL "-g:lines,source,vars")
else ()
	set(JAVA_COMPILE_FLAG_CONDITIONAL "-g:lines,source")
endif ()


# Tell windows to pass arguments around in @response files
# (32k arg limit workaround)
if    (WIN32)
	set(CMAKE_C_USE_RESPONSE_FILE_FOR_OBJECTS 1)
	set(CMAKE_CXX_USE_RESPONSE_FILE_FOR_OBJECTS 1)
endif ()


# XCode
if    (APPLE)
	option(MACOSX_BUNDLE "Compile spring to work as a Bundle.app" TRUE)
	add_definitions(${PIC_FLAG})
	if    (MACOSX_BUNDLE)
		add_definitions(-DMACOSX_BUNDLE)
	endif ()
else ()
	set(MACOSX_BUNDLE FALSE)
endif ()

### Compiler flags and defines based on build type
include(TestCXXFlags)

## 32bit or 64bit?
set(MARCH_FLAG ${MARCH} CACHE STRING "CPU optimization (use i686 for generic optimization)")
if    (CMAKE_SIZEOF_VOID_P EQUAL 8)
	set(MARCH_BITS 64 CACHE INTERNAL "" FORCE)
else ()
	set(MARCH_BITS 32 CACHE INTERNAL "" FORCE)
endif ()

message(STATUS "Building Spring on ${MARCH_BITS}bit environment")
set(BUILD_BITS "${MARCH_BITS}" CACHE STRING "Target arch machine type")
message(STATUS "Targetting ${BUILD_BITS}bit")


### Install paths (relative to CMAKE_INSTALL_PREFIX)
if    (UNIX AND NOT MINGW)
	set(BINDIR  "bin"                CACHE STRING "Where to install binaries")
	set(LIBDIR  "lib"                CACHE STRING "Where to install libraries")
	set(MANDIR  "share/man"          CACHE STRING "Where to install man pages")
	set(DOCDIR  "share/doc/spring-VERSION" CACHE STRING "Where to install basic project documentation (README, LICENSE, etc.)") # TODO set correct version here, and re-enable userdocs in doc/CMakeLists.txt
	set(DATADIR "share/games/spring" CACHE STRING "Where to install game content")

	set(APPLICATIONS_DIR "share/applications" CACHE STRING "Where to install desktop files")
	set(PIXMAPS_DIR      "share/pixmaps"      CACHE STRING "Where to install icons")
	set(MIME_DIR         "share/mime"         CACHE STRING "Where MIME definitions are located")
else ()
	set(BINDIR  "." CACHE STRING "Where to install binaries")
	set(LIBDIR  "." CACHE STRING "Where to install libraries")
	set(DOCDIR  "doc" CACHE STRING "Where to install basic project documentation (README, LICENSE, etc.)")
	set(DATADIR "." CACHE STRING "Where to install game content")

	if    (NOT MINGWLIBS)
		if(MSVC)
			set(MINGWLIBS ${CMAKE_SOURCE_DIR}/vclibs CACHE PATH "Location of the vclibs package")
		else ()
			if(BUILD_BITS EQUAL 32)
				set(MINGWLIBS ${CMAKE_SOURCE_DIR}/mingwlibs CACHE PATH "Location of the mingwlibs package")
			else ()
				set(MINGWLIBS ${CMAKE_SOURCE_DIR}/mingwlibs64 CACHE PATH "Location of the mingwlibs package")
			endif ()
		endif ()
	endif ()
	if    (EXISTS "${MINGWLIBS}" AND IS_DIRECTORY "${MINGWLIBS}")
		# MinGW needs an additional library, mwindows
		# It's total link flags should look like -lmingw32 -lSDL2main -lSDL2 -lmwindows
		# (Actually on second look, I think it only needs one of the m* libraries.)
		if(NOT MSVC)
			set(MINGW32_LIBRARY mingw32 CACHE STRING "mwindows for MinGW")
		endif ()
		set(SDL2_INCLUDE_DIRS "${MINGWLIBS}/include/SDL2")
		set(CMAKE_PREFIX_PATH ${MINGWLIBS})
		include_directories(${MINGWLIBS}/include)
		set(CMAKE_LIBRARY_PATH ${MINGWLIBS}/dll ${MINGWLIBS}/lib)

		# some cross-compile fixes
		set(CMAKE_FIND_ROOT_PATH ${MINGWLIBS} ${CMAKE_FIND_ROOT_PATH})
		set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
		set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
	else ()
		message(WARNING "Compiling for windows. MINGWLIBS '${MINGWLIBS}' is not a valid directory, trying system libs")
	endif ()


	add_definitions(-D_WIN32_WINNT=0x502) ## vista is minimum due to InterlockedIncrement64
	add_definitions(-D__USE_MINGW_ANSI_STDIO=1) ## use __mingw_sprintf instead of __builtin_sprintf (it's used by lua in a synced way, and builtin doesn't sync)

	if(${CMAKE_CXX_COMPILER_ID} STREQUAL "Clang")
		add_definitions(-DWIN32)
	endif ()

	if(MSVC)
		add_definitions(-DNOMINMAX -DWIN32_LEAN_AND_MEAN)
		set(EXE_FLAGS WIN32)
	else ()
		include_directories(rts/lib/mingw-std-threads)
	endif ()
endif ()

## Artificial Intelligence
# In theory, it should be possible to set this to LIBDIR instead
# (next two are relative to CMAKE_INSTALL_PREFIX)
set(AI_LIBS_DIR "${DATADIR}"     CACHE STRING "Where to install Skirmish AI libraries")
set(AI_DATA_DIR "${AI_LIBS_DIR}" CACHE STRING "Where to install Skirmish AI additional files (eg. configuration)")
set(AI_TYPES    "ALL"            CACHE STRING "Which AI Interfaces (and Skirmish AIs using them) to build [ALL|NATIVE|JAVA|NONE]")

## DataDirs
set(BUILTIN_DATADIRS "")
if    (NOT WIN32 AND NOT MACOSX_BUNDLE)
	set(SPRING_DATADIR CACHE STRING "Path to game content (in addition to /etc/spring/datadir)")
	set(SPRING_DATADIR_INTERNAL "")
	if    (SPRING_DATADIR)
		set(SPRING_DATADIR_INTERNAL "${SPRING_DATADIR}${PATH_DELIM_T}")
	endif ()
	if    (CMAKE_INSTALL_PREFIX)
		set(SPRING_DATADIR_INTERNAL "${SPRING_DATADIR_INTERNAL}${CMAKE_INSTALL_PREFIX}${PATH_SEP_T}${DATADIR}")
	endif ()
	set(BUILTIN_DATADIRS "${SPRING_DATADIR_INTERNAL}")
endif ()
if    (NOT "${AI_LIBS_DIR}" STREQUAL "${DATADIR}")
	# If the AI library dir is not the same as the normal data dir,
	# add it to the internal list of data dirs
	set(BUILTIN_DATADIRS "${BUILTIN_DATADIRS}${PATH_DELIM_T}${CMAKE_INSTALL_PREFIX}${PATH_SEP_T}${AI_LIBS_DIR}")
endif ()
if    (NOT "${AI_DATA_DIR}" STREQUAL "${DATADIR}" AND NOT "${AI_DATA_DIR}" STREQUAL "${AI_LIBS_DIR}")
	# If the AI data dir is not the same as the normal data dir
	# nor the AI library dir, add it to the internal list of data dirs
	set(BUILTIN_DATADIRS "${BUILTIN_DATADIRS}${PATH_DELIM_T}${CMAKE_INSTALL_PREFIX}${PATH_SEP_T}${AI_DATA_DIR}")
endif ()
add_definitions(-DSPRING_DATADIR="${BUILTIN_DATADIRS}")



# Spring Related USE-Flags
set(LOG_LEVEL "DEFAULT" CACHE STRING
		"The minimum log level.
		Log messages below this level
		will not be compiled into the binary.
		Available levels:
		* DEFAULT (DEBUG on debug builds, INFO on release builds)
		* DEBUG (log everything)
		* INFO
		* WARNING (only use this if you know what you are doing!)")
if    (NOT "${LOG_LEVEL}" STREQUAL "DEFAULT")
	add_definitions(-D_LOG_LEVEL_MIN=LOG_LEVEL_${LOG_LEVEL})
endif ()

option(SYNCCHECK "Check sync during gameplay (Required for online play!)" TRUE)
if    (SYNCCHECK)
	add_definitions(-DSYNCCHECK)
endif ()

option(NO_CREG "Disable creg support" FALSE)
if    (NO_CREG)
	add_definitions(-DNOT_USING_CREG)
endif ()

option(NO_SOUND "No sound output support" FALSE)

if    (WIN32)
	## internal AVI recorder (w/o sound atm)
	option(NO_AVI "Disable in-game video recording" FALSE)
	if    (NOT NO_AVI)
		add_definitions(-DAVI_CAPTURING)
	endif ()

	if   (NOT MSVC)
		## stdout console
		option(WINDOWS_CONSOLE "Show a visible cmd.exe with stdout when spring runs" FALSE)
		if    (NOT WINDOWS_CONSOLE)
			set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -mwindows")
		endif ()
	endif ()
endif ()


find_package(PkgConfig REQUIRED)
pkg_check_modules(SDL2 REQUIRED sdl2>=2)
pkg_check_modules(OPENGL REQUIRED opengl)
pkg_check_modules(GLEW REQUIRED glew>=1.5.1)
pkg_check_modules(IL REQUIRED IL)


if    (WIN32)
	find_package(Windres REQUIRED)
	set(CMAKE_RC_COMPILER ${WINDRES_BIN})
	find_package(Win32Libs REQUIRED)
endif ()

if     (WIN32)
	set(CMAKE_SHARED_LIBRARY_PREFIX "")
	set(CMAKE_SHARED_MODULE_PREFIX "")
elseif (UNIX)
	# unix specifics
else ()
	# mac
	find_library(COREFOUNDATION_LIBRARY CoreFoundation)
	include_directories("${COREFOUNDATION_LIBRARY}/Headers")
endif ()

find_package(Valgrind)
if    (VALGRIND_FOUND)
	add_definitions(-DUSE_VALGRIND)
endif ()

include (CheckSymbolExists)
check_symbol_exists(strnlen string.h HAVE_STRNLEN)
if (NOT HAVE_STRNLEN)
	message(FATAL_ERROR "this compiler/environment isn't supported, the function strnlen is missing!")
endif ()

### Add Link-Time-Optimization flags, if supported (GCC >= 4.5) and enabled
option(LTO "Link Time Optimizations (LTO)" FALSE)
if    (LTO)
	if    (NOT LTO_FLAGS)
		message(WARNING "Tried to enable LTO, but compiler doesn't support it!")
	endif ()
	set(CMAKE_CXX_FLAGS           "${CMAKE_CXX_FLAGS}           ${LTO_FLAGS}")
	set(CMAKE_EXE_LINKER_FLAGS    "${CMAKE_EXE_LINKER_FLAGS}    ${LTO_FLAGS}")
	set(CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} ${LTO_FLAGS}")
endif ()


### Memory Access Protection (BoundsChecking)
option(DEBUG_BOUNDSCHECK "Array/Pointer BoundsChecking a.k.a. buffer overflow protection (debug)" FALSE)
if    (DEBUG_BOUNDSCHECK)
	if    (NOT MPX_FLAGS)
		message(WARNING "Tried to enable BoundsCheck, but compiler doesn't support it!")
	endif ()
	set(CMAKE_CXX_FLAGS           "${CMAKE_CXX_FLAGS}           ${MPX_FLAGS}")
	set(CMAKE_EXE_LINKER_FLAGS    "${CMAKE_EXE_LINKER_FLAGS}    ${MPX_FLAGS}")
	set(CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} ${MPX_FLAGS}")
endif ()


### ld.gold
option(COMPRESS_DEBUG_SYMBOLS "Compresses the DebugSymbols (needs ld.gold, beware: slow)" FALSE)
if(LDGOLD_FOUND AND PREFER_STATIC_LIBS AND NOT UNIX)
	message(STATUS "Found ld.gold")
	if    (COMPRESS_DEBUG_SYMBOLS)
		message(STATUS "Compressing debug symbols")
		set(LDGOLD_LINKER_FLAGS " -Wl,--compress-debug-sections=zlib ${LDGOLD_LINKER_FLAGS}")
	endif ()

	set(CMAKE_LINKER LD_GOLD)
	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${LDGOLD_CXX_FLAGS}")
	set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${LDGOLD_LINKER_FLAGS}")
else()
	message(WARNING "You are using ld.bfd, it's much slower than ld.gold.")
endif()

message(STATUS "Compiling with C++17")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${CXX17_FLAGS}")

add_definitions(-D_GLIBCXX_USE_NANOSLEEP) # issue in std::chrono with gentoo and few other distros
add_definitions(-D_RANDOM_TCC) # don't include <bits/random.tcc>, it fails to compile with single precision constants


### our custom OpenMP replacement
option(THREADPOOL "Enable ThreadPools" TRUE)
if (THREADPOOL)
	add_definitions(-DTHREADPOOL)
endif ()


### warnings
if(NOT MSVC)
	### SigNan
	option(DEBUG_SIGNAL_NANS "Enable NaN-Signaling" ${DEBUG_BUILD})
	if (DEBUG_SIGNAL_NANS AND CMAKE_COMPILER_IS_GNUCXX)
		set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsignaling-nans")
	endif ()


	### CompileTime Warnings
	set(COMMON_WARNINGS "${COMMON_WARNINGS} -Wformat -Wformat-security")

	option(DEBUG_MAX_WARNINGS "Enable verbose compile" ${DEBUG_BUILD})
	if    (DEBUG_MAX_WARNINGS)
		# This would produce the maximum on warnings
		set(DEBUG_WARNINGS "-Wall -Wconversion ${COMMON_WARNINGS}")
	else ()
		# This should produce a sane amount of warnings
		set(DEBUG_WARNINGS "-Wall -Wno-sign-compare ${COMMON_WARNINGS}")
	endif ()
endif ()


if(DEBUG_BUILD)
        set(DEBUG_LUANAN_DEFAULT TRUE)
else ()
        set(DEBUG_LUANAN_DEFAULT FALSE)
endif ()

option(DEBUG_LUANAN "check for nans in lua" ${DEBUG_LUANAN_DEFAULT})
if(DEBUG_LUANAN)
        add_definitions(-DDEBUG_LUANAN)
endif ()



### streflop
option(ENABLE_STREFLOP "build Spring with streflop support (REQUIRED FOR MULTIPLAYER)" TRUE)

if (ENABLE_STREFLOP)
## note: is removed in ./AI/CMakeLists.txt since it would break AI compilation
	if (HAS_I686_FLAG_ OR HAS_X86_64_FLAG_ OR MSVC)
		add_definitions(-DSTREFLOP_SSE)
		message(STATUS "Build with streflop support (using SSE implementation)")
	else ()
		add_definitions(-DSTREFLOP_SOFT)
		message(STATUS "Build with streflop support (using software implementation)")
	endif ()
else ()
	add_definitions(-DNOT_USING_STREFLOP)
	message(STATUS "Build without streflop support (REQUIRED FOR MULTIPLAYER)")
endif ()



### Asio
add_definitions(-DASIO_STANDALONE)

### compiler specific flags
set(CXX_FLAGS_DEBUG_ADDITIONAL "")
if    ($ENV{CXX} MATCHES "icpc")
	# intel C/C++ compiler fix; it does not support these flags:
	# "-march -mfpmath -msse -ggdb"
	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -axK") # SSE1
	set(CXX_FLAGS_DEBUG_ADDITIONAL "-g -debug full")
elseif (CMAKE_COMPILER_IS_GNUCXX)
	if    (UNIX)
		check_and_add_flags(CMAKE_CXX_FLAGS "-fdiagnostics-color=auto")
	endif ()

	if    (MARCH_FLAG)
		set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -march=${MARCH_FLAG}")
		message(STATUS "using march=${MARCH_FLAG}")
	else ()
		set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mtune=generic")
		message(STATUS "using mtune=generic")
	endif ()

	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${SSE_FLAGS}") # SSE1
elseif (MSVC)
	# silence warnings
	add_definitions(-D_SILENCE_STDEXT_HASH_DEPRECATION_WARNINGS)
else ()
	message(WARNING "unknown compiler")
endif ()

set(CXX_DEBUG_DEFINES          "-DDEBUG -D_DEBUG -DNO_CATCH_EXCEPTIONS")
set(CXX_RELWITHDEBINFO_DEFINES "-DNDEBUG")
set(CXX_RELEASE_DEFINES        "-DNDEBUG")

#### build types
if    (MSVC)
	set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} /LARGEADDRESSAWARE")
	set(MSVC_CXX_FLAGS "/wd4146 /wd4711")

	set(CMAKE_CXX_FLAGS_DEBUG           "${CMAKE_CXX_FLAGS_DEBUG}                       /MP ${MSVC_CXX_FLAGS} ${CXX_DEBUG_DEFINES}")
	set(CMAKE_CXX_FLAGS_RELWITHDEBINFO  "${CMAKE_CXX_FLAGS_RELWITHDEBINFO} /O2 /Ob2 /GL /MP ${MSVC_CXX_FLAGS} ${CXX_RELWITHDEBINFO_DEFINES}")
	set(CMAKE_CXX_FLAGS_RELEASE         "${CMAKE_CXX_FLAGS_RELEASE}        /O2 /Ob2 /GL /MP ${MSVC_CXX_FLAGS} ${CXX_RELEASE_DEFINES}")

	set(CMAKE_EXE_LINKER_FLAGS_RELEASE        "${CMAKE_EXE_LINKER_FLAGS_RELEASE}        /LTCG")
	set(CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO} /LTCG")
else ()
	if (CMAKE_COMPILER_IS_GNUCXX)
		set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsingle-precision-constant -frounding-math")
	endif ()
	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${IEEE_FP_FLAG} -pipe -fno-strict-aliasing")

	if(UNIX)
		find_package(Threads REQUIRED)
		set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -pthread")
	endif()

	if(MINGW)
		set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -mthreads")
	endif()

	set(CMAKE_CXX_FLAGS_DEBUG           "${CXX_FLAGS_DEBUG_ADDITIONAL} -O0     ${DEBUG_WARNINGS}  ${CXX_DEBUG_DEFINES}")
	set(CMAKE_CXX_FLAGS_RELWITHDEBINFO  "${CXX_FLAGS_DEBUG_ADDITIONAL} -O2     ${COMMON_WARNINGS} ${CXX_RELWITHDEBINFO_DEFINES}")
	set(CMAKE_CXX_FLAGS_RELEASE         "                              -O2     ${COMMON_WARNINGS} ${CXX_RELEASE_DEFINES}")

	set(CMAKE_CXX_FLAGS_DEBUG          "${CMAKE_CXX_FLAGS_DEBUG} -ggdb")
	set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO} -g")

	if (MARCH_BITS EQUAL 64 AND BUILD_BITS EQUAL 32)
		set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -m32")
		set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -m32")
	endif ()

	if     (MINGW)
		set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -static -static-libgcc -static-libstdc++ -Wl,--enable-auto-import")
		set(CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} -static -static-libgcc -static-libstdc++ -Wl,--enable-auto-import")
		if    (BUILD_BITS EQUAL 32)
			# Increase memory limit from 2GB to 3GB on 32bit Windows and 2GB->4GB on 64bit Windows (assuming spring.exe is 32bit)
			# http://msdn.microsoft.com/en-us/library/windows/desktop/aa366778(v=vs.85).aspx
			message(STATUS "Enable IMAGE_FILE_LARGE_ADDRESS_AWARE (>2GB memory limit)")
			set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,--large-address-aware")
			message(WARNING "The 32bit version of spring on windows is experimental and may not sync with regular builds")
		endif ()
	endif ()
endif ()



#######################################
# Source Files
#

# Sub-parts of the build system may add dependencies to this target
add_custom_target(generateSources)

# Make sure git is found if git is used
if   (EXISTS "${CMAKE_SOURCE_DIR}/.git")
	find_package(Git REQUIRED)
endif ()

# Generate the version files
set(VERSION_GENERATE_DIR "${CMAKE_BINARY_DIR}")

set(VERSION_GENERATE_SOURCES
		"${VERSION_GENERATE_DIR}/src-generated/engine/System/VersionGenerated.h"
		"${VERSION_GENERATE_DIR}/VERSION"
	)

set_source_files_properties(
	${VERSION_GENERATE_SOURCES}
	PROPERTIES GENERATED TRUE
)

# This is always executed (on every run of "make"),
# but the actual version files are only written in case of a change
# in the version info they use, or in the template file content.
if (MSVC)
	add_custom_command(
		OUTPUT ${VERSION_GENERATE_SOURCES}
		COMMAND "${CMAKE_COMMAND}"
			"-DSOURCE_ROOT=${CMAKE_SOURCE_DIR}"
			"-DCMAKE_MODULES_SPRING=${CMAKE_MODULES_SPRING}"
			"-DGENERATE_DIR=${VERSION_GENERATE_DIR}"
			"-DVERSION_ADDITIONAL=${VERSION_ADDITIONAL}"
			-P "${CMAKE_MODULES_SPRING}/ConfigureVersion.cmake"
			"${VERSION_GENERATE_DIR}"
		COMMENT
			"  Configuring Version files ..." VERBATIM
		)
	add_custom_target(generateVersionFiles DEPENDS ${VERSION_GENERATE_SOURCES})
else ()
	# This is always executed (on every run of "make"),
	# but the actual version files are only written in case of a change
	# in the version info they use, or in the template file content.
	add_custom_target(generateVersionFiles)
	add_custom_command(TARGET generateVersionFiles
		COMMAND "${CMAKE_COMMAND}"
			"-DSOURCE_ROOT=${CMAKE_SOURCE_DIR}"
			"-DCMAKE_MODULES_SPRING=${CMAKE_MODULES_SPRING}"
			"-DGENERATE_DIR=${VERSION_GENERATE_DIR}"
			"-DVERSION_ADDITIONAL=${VERSION_ADDITIONAL}"
			-P "${CMAKE_MODULES_SPRING}/ConfigureVersion.cmake"
			"${VERSION_GENERATE_DIR}"
		COMMENT
			"  Configuring Version files ..." VERBATIM
	)

endif ()

add_dependencies(generateSources generateVersionFiles)


### Where the other CMakeLists.txt are

# As the libs are required by all the other sub-projects, we add them first
add_subdirectory(rts/lib)

if    (NOT "${AI_TYPES}" STREQUAL "NONE")
	add_subdirectory(AI)
endif ()

# As tools/unitsync/ depends on sources from here, we add this one first
add_subdirectory(rts/System)

# additional tools
add_subdirectory(tools)

# man pages & user-docs
add_subdirectory(doc)

### Handle game content
### - Pack base-files
### - Install base-files
### - Install freedesktop stuff
### - Install mingw DLLs
add_subdirectory(cont)

# As rts/builds/* depends on most other stuff, we add this one as last
add_subdirectory(rts)

# Unit tests
# this has to be in root CMakeLists.txt
enable_testing()
add_subdirectory(test)