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project(Spring)

# CMake 2.4:
# - lacks some cross-compiling features and fails on windows
# CMake 2.6:
# - fixes: Windows command line is limited to 32k length commands
# CMake 2.6.3:
# + support for SOURCES attribute of add_custom_target() (not required anymore)
# CMake 2.8
# + works around command line length limited by using an @objectFilesList.txt parameter when linking
if (WIN32)
set(MIN_CMAKE_VERSION 2.8)
else (WIN32)
set(MIN_CMAKE_VERSION 2.6)
endif (WIN32)
cmake_minimum_required(VERSION ${MIN_CMAKE_VERSION})

SET(CMAKE_MODULES_SPRING "${CMAKE_CURRENT_SOURCE_DIR}/rts/build/cmake")
LIST(APPEND CMAKE_MODULE_PATH "${CMAKE_MODULES_SPRING}")


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

CheckMinCMakeVersion(CUSTOM_TARGET_SOURCES_SUPPORT 2 6 3)


# set some internal vars
If ("${CMAKE_BUILD_TYPE}" MATCHES "^DEBUG")
Set(DEBUG_BUILD TRUE)
Else ("${CMAKE_BUILD_TYPE}" MATCHES "^DEBUG")
Set(DEBUG_BUILD FALSE)
EndIf ("${CMAKE_BUILD_TYPE}" MATCHES "^DEBUG")


### Strip C[XX]_FLAGS
set(CUSTOM_CFLAGS FALSE CACHE BOOL "If false all C[XX]_FLAGS are cleared (more reliable to sync/safer for online play).")
if (CUSTOM_CFLAGS)
Message(WARNING "Using custom CXX_FLAGS! this build will very likely not sync in online mode!")
else (CUSTOM_CFLAGS)
set(CMAKE_C_FLAGS "")
set(CMAKE_CXX_FLAGS "")
endif (CUSTOM_CFLAGS)


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


### 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 DEBUG2 DEBUG3 RELEASE PROFILE"
FORCE)
endif (NOT CMAKE_BUILD_TYPE)


# 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 (WIN32)


# XCode
if (APPLE)
set(MACOSX_BUNDLE TRUE CACHE BOOL "Compile spring to work as a Bundle.app")
if (MACOSX_BUNDLE)
add_definitions(-DMACOSX_BUNDLE)
endif (MACOSX_BUNDLE)
else (APPLE)
set(MACOSX_BUNDLE FALSE)
endif (APPLE)

if (UNIX AND NOT MINGW)
execute_process(COMMAND ${CMAKE_LINKER} "-v" COMMAND "grep" "-iq" "gold" RESULT_VARIABLE hasGold)
if (hasGold EQUAL 0)
Message(STATUS "Found ld.gold, compressing debugsymbols")
set(CMAKE_EXE_LINKER_FLAGS " -Wl,--compress-debug-sections=zlib ${CMAKE_EXE_LINKER_FLAGS}")
else (hasGold EQUAL 0)
Message(WARNING "You are using ld.bfd, it's much slower than ld.gold.")
endif (hasGold EQUAL 0)
endif (UNIX AND NOT MINGW)


### 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")
set(STABS_DEBUG_SYMBOLS FALSE CACHE BOOL "Use stabs debug symbols (-stabs) instead of the GDB format (-gdb). This probably makes gdb and eg. addr2line work better with windows binaries (depends mainly on the tools version).")
else (UNIX AND NOT MINGW)
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)
set(MINGWLIBS ${CMAKE_SOURCE_DIR}/mingwlibs CACHE PATH "Location of the mingwlibs package")
endif (NOT MINGWLIBS)
if (NOT EXISTS "${MINGWLIBS}" OR NOT IS_DIRECTORY "${MINGWLIBS}")
MESSAGE(FATAL_ERROR "MINGWLIBS is not a valid directory")
endif (NOT EXISTS "${MINGWLIBS}" OR NOT IS_DIRECTORY "${MINGWLIBS}")
include_directories(${MINGWLIBS}/include)
set(CMAKE_LIBRARY_PATH ${MINGWLIBS}/dll)
set(CMAKE_PREFIX_PATH ${MINGWLIBS})

add_definitions(-D_WIN32_WINNT=0x500) ## win2k is minimum
# 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)
set(STABS_DEBUG_SYMBOLS FALSE CACHE BOOL "Use stabs debug symbols (-stabs) instead of the GDB format (-gdb). This probably makes gdb and eg. addr2line work better with windows binaries (depends mainly on the tools version).")
endif (UNIX AND NOT MINGW)

## 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 MINGW 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 (SPRING_DATADIR)
if (CMAKE_INSTALL_PREFIX)
set(SPRING_DATADIR_INTERNAL "${SPRING_DATADIR_INTERNAL}${CMAKE_INSTALL_PREFIX}${PATH_SEP_T}${DATADIR}")
endif (CMAKE_INSTALL_PREFIX)
set(BUILTIN_DATADIRS "${SPRING_DATADIR_INTERNAL}")
endif (NOT MINGW AND NOT MACOSX_BUNDLE)
if (NOT "${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 (NOT "${AI_LIBS_DIR}" STREQUAL "${DATADIR}")
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}${AI_DATA_DIR}")
endif (NOT "${AI_DATA_DIR}" STREQUAL "${DATADIR}" AND NOT "${AI_DATA_DIR}" STREQUAL "${AI_LIBS_DIR}")
add_definitions(-DSPRING_DATADIR="${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 (NOT "${LOG_LEVEL}" STREQUAL "DEFAULT")

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

set(NO_SOUND FALSE CACHE BOOL "No sound output support")

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

## stdout console
set(WINDOWS_CONSOLE FALSE CACHE BOOL "Show a visible cmd.exe with stdout when spring runs")
if (NOT WINDOWS_CONSOLE)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mwindows")
endif (NOT WINDOWS_CONSOLE)
endif (WIN32)

set(HEADLESS_SYSTEM FALSE CACHE BOOL "Compile for a headless system (default- and MT-spring will not be built!)")
if (HEADLESS_SYSTEM AND NOT NO_SOUND)
message(FATAL_ERROR "HEADLESS_SYSTEM requires NO_SOUND to be set!")
endif (HEADLESS_SYSTEM AND NOT NO_SOUND)


### external libs
if (MINGW)
set(SDL_INCLUDE_DIR "${MINGWLIBS}/include/SDL")
endif (MINGW)

FIND_PACKAGE(Boost 1.35.0 COMPONENTS thread regex program_options system signals REQUIRED)
FIND_PACKAGE(Boost 1.35.0 COMPONENTS chrono)
INCLUDE_DIRECTORIES(${Boost_INCLUDE_DIR})

# Note the missing REQUIRED, as headless & dedi may not depend on those.
# So req. checks are done in the build target's CMakeLists.txt.
FIND_PACKAGE(SDL)
FIND_PACKAGE_STATIC(DevIL)
IF (PREFER_STATIC_LIBS)
# dependencies of DevIL
FIND_PACKAGE_STATIC(JPEG REQUIRED)
FIND_PACKAGE_STATIC(PNG REQUIRED)
ENDIF (PREFER_STATIC_LIBS)

if (WIN32)
FIND_PACKAGE(Windres)
endif (WIN32)
IF (MINGW)
FIND_PACKAGE(Win32Libs REQUIRED)
ENDIF (MINGW)

if (MINGW)
set(CMAKE_SHARED_LIBRARY_PREFIX "")
set(CMAKE_SHARED_MODULE_PREFIX "")
elseif (UNIX)
# unix specifics
else (UNIX)
# mac
FIND_LIBRARY(COREFOUNDATION_LIBRARY CoreFoundation)
INCLUDE_DIRECTORIES("${COREFOUNDATION_LIBRARY}/Headers")
endif (MINGW)

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


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

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


### Add Link-Time-Optimization flags, if supported (GCC >= 4.5) and enabled
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}")

set(OPENMP TRUE CACHE BOOL "Enable local multithreading")
if (OPENMP)
include(FindOpenMP)
if(OPENMP_FOUND)
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${OpenMP_C_FLAGS}")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${OpenMP_CXX_FLAGS}")
# Currently FindOpenMP fails and doesn't give _any_ linker flags
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -fopenmp -lgomp")
set(CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} -fopenmp -lgomp")
set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -fopenmp -lgomp")
endif(OPENMP_FOUND)
endif (OPENMP)

set(SIGNAL_NANS ${DEBUG_BUILD} CACHE BOOL "Enable NaN-Signalling")
if (SIGNAL_NANS)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsignaling-nans")
endif(SIGNAL_NANS)


### CompileTime Warnings
set(COMMON_WARNINGS "")
if (NOT OPENMP)
# disable warnings about unknown pragmas because of:
# "#pragma omp parallel for *"
set(COMMON_WARNINGS "${COMMON_WARNINGS} -Wno-unknown-pragmas")
endif (NOT OPENMP)

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


### CXX_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 (NOT CUSTOM_CFLAGS)
if (MARCH_FLAG)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -march=${MARCH_FLAG}")
Message(STATUS "using march=${MARCH_FLAG}")
else (MARCH_FLAG)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mtune=generic")
Message(STATUS "using mtune=generic (unsure if it will sync in online gaming)")
endif (MARCH_FLAG)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${SSE_FLAGS}") # SSE1
endif (NOT CUSTOM_CFLAGS)
else (CMAKE_COMPILER_IS_GNUCXX)
Message(FATAL_ERROR "unknown compiler")
endif ($ENV{CXX} MATCHES "icpc")

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsingle-precision-constant -frounding-math")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${IEEE_FP_FLAG} -pipe -fno-strict-aliasing ${VISIBILITY_HIDDEN} ${VISIBILITY_INLINES_HIDDEN}")
if (UNIX)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -pthread")
endif (UNIX)
if (MINGW)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mthreads")
endif (MINGW)
add_definitions(-DSTREFLOP_SSE) # would break AI compiling, but is undefined in ./AI/CMakeLists.txt
add_definitions(-DBOOST_NO_FENV_H) # streflop overrides fenv.h

set(CMAKE_CXX_FLAGS_DEBUG "${CXX_FLAGS_DEBUG_ADDITIONAL} -O1 ${DEBUG_WARNINGS} -DDEBUG -D_DEBUG -DNO_CATCH_EXCEPTIONS")
set(CMAKE_CXX_FLAGS_DEBUG2 "${CXX_FLAGS_DEBUG_ADDITIONAL} -O0 ${DEBUG_WARNINGS} -DDEBUG -D_DEBUG -DNO_CATCH_EXCEPTIONS")
set(CMAKE_CXX_FLAGS_DEBUG3 "${CXX_FLAGS_DEBUG_ADDITIONAL} -O0 ${DEBUG_WARNINGS} -DDEBUG -D_DEBUG -DNO_CATCH_EXCEPTIONS")
set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CXX_FLAGS_DEBUG_ADDITIONAL} -O2 ${COMMON_WARNINGS} -DNDEBUG")
set(CMAKE_CXX_FLAGS_RELEASE " -O2 ${COMMON_WARNINGS} -DNDEBUG")
set(CMAKE_CXX_FLAGS_PROFILE " -O2 -pg ${DEBUG_WARNINGS} -DNDEBUG")
set(CMAKE_MODULE_LINKER_FLAGS_PROFILE "-pg")
set(CMAKE_SHARED_LINKER_FLAGS_PROFILE "-pg")
if (STABS_DEBUG_SYMBOLS)
set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -gstabs")
set(CMAKE_CXX_FLAGS_DEBUG2 "${CMAKE_CXX_FLAGS_DEBUG2} -gstabs")
set(CMAKE_CXX_FLAGS_DEBUG3 "${CMAKE_CXX_FLAGS_DEBUG3} -gstabs")
set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO} -gstabs")
else (STABS_DEBUG_SYMBOLS)
set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -ggdb1")
set(CMAKE_CXX_FLAGS_DEBUG2 "${CMAKE_CXX_FLAGS_DEBUG2} -ggdb2")
set(CMAKE_CXX_FLAGS_DEBUG3 "${CMAKE_CXX_FLAGS_DEBUG3} -ggdb3")
set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO} -g")
endif (STABS_DEBUG_SYMBOLS)

if (MINGW)
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,--enable-auto-import")
if (MARCH_BITS EQUAL 32)
# Increase memory limit from 2GB to 3GB on 32bit Windows and 2GB->4GB on 64bit Windows (assuming spring.exe is 32bit)
# http://msdn.microsoft.com/en-us/library/windows/desktop/aa366778(v=vs.85).aspx
Message(STATUS "Enable IMAGE_FILE_LARGE_ADDRESS_AWARE (>2GB memory limit)")
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,--large-address-aware")
endif (MARCH_BITS EQUAL 32)
endif (MINGW)




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

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


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

Set_Source_Files_Properties(
"${VERSION_GENERATE_DIR}/src-generated/engine/System/VersionGenerated.h"
"${VERSION_GENERATE_DIR}/VERSION"
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.
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"
COMMENT
" Configuring Version files ..." VERBATIM
)

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

# 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; it requires CMake 2.6.3 or later
ENABLE_TESTING()
Add_Subdirectory(test)
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