cmake_minimum_required (VERSION 2.6.4)

include (CheckFunctionExists)

include (CheckIncludeFile)

include (CheckCXXSourceCompiles)

project(SimGear)

# read 'version' file into a variable (stripping any newlines or spaces)

file(READ version versionFile)

string(STRIP ${versionFile} SIMGEAR_VERSION)

# use simgear version also as the SO version (if building SOs)

SET(SIMGEAR_SOVERSION ${SIMGEAR_VERSION})

#packaging

SET(CPACK_RESOURCE_FILE_LICENSE "${PROJECT_SOURCE_DIR}/COPYING")

SET(CPACK_RESOURCE_FILE_README "${PROJECT_SOURCE_DIR}/README")

SET(CPACK_PACKAGE_DESCRIPTION_SUMMARY "Simulation support libraries for FlightGear and related projects")

SET(CPACK_PACKAGE_VENDOR "The FlightGear project")

SET(CPACK_GENERATOR "TBZ2")

SET(CPACK_INSTALL_CMAKE_PROJECTS  ${CMAKE_CURRENT_BINARY_DIR};SimGear;ALL;/)

# split version string into components, note CMAKE_MATCH_0 is the entire regexp match

string(REGEX MATCH "([0-9]+)\\.([0-9]+)\\.([0-9]+)" CPACK_PACKAGE_VERSION ${SIMGEAR_VERSION} )

set(CPACK_PACKAGE_VERSION_MAJOR ${CMAKE_MATCH_1}) 

set(CPACK_PACKAGE_VERSION_MINOR ${CMAKE_MATCH_2})

set(CPACK_PACKAGE_VERSION_PATCH ${CMAKE_MATCH_3})

message(STATUS "version is ${CPACK_PACKAGE_VERSION_MAJOR} dot ${CPACK_PACKAGE_VERSION_MINOR} dot ${CPACK_PACKAGE_VERSION_PATCH}")

set(CPACK_SOURCE_GENERATOR TBZ2)

set(CPACK_SOURCE_PACKAGE_FILE_NAME "simgear-${SIMGEAR_VERSION}" CACHE INTERNAL "tarball basename")

set(CPACK_SOURCE_IGNORE_FILES

  "^${PROJECT_SOURCE_DIR}/.git;\\\\.gitignore;Makefile.am;~$;${CPACK_SOURCE_IGNORE_FILES}")

message(STATUS "ignoring: ${CPACK_SOURCE_IGNORE_FILES}")

include (CPack)

# We have some custom .cmake scripts not in the official distribution.

set(CMAKE_MODULE_PATH "${PROJECT_SOURCE_DIR}/CMakeModules;${CMAKE_MODULE_PATH}")

# Change the default build type to something fast

if(NOT CMAKE_BUILD_TYPE)

  set(CMAKE_BUILD_TYPE Release CACHE STRING

      "Choose the type of build, options are: None Debug Release RelWithDebInfo MinSizeRel."

      FORCE)

endif(NOT CMAKE_BUILD_TYPE)

# Determine name of library installation directory, i.e. "lib" vs "lib64", which

# differs between all Debian-based vs all other Linux distros.

# See cmake bug #11964, http://cmake.org/gitweb?p=cmake.git;a=commit;h=126c993d

# GNUInstallDirs requires CMake >= 2.8.5, use own file for older cmake

if(${CMAKE_VERSION} VERSION_GREATER 2.8.4)

  include(GNUInstallDirs)

else(${CMAKE_VERSION} VERSION_GREATER 2.8.4)

  include(OldGNUInstallDirs)

endif(${CMAKE_VERSION} VERSION_GREATER 2.8.4)

message(STATUS "Library installation directory: ${CMAKE_INSTALL_LIBDIR}")

option(SIMGEAR_SHARED "Set to ON to build SimGear as a shared library/framework" OFF)

option(SIMGEAR_HEADLESS "Set to ON to build SimGear without GUI/graphics support" OFF)

option(JPEG_FACTORY "Enable JPEG-factory support" OFF)

option(ENABLE_LIBSVN "Set to ON to build SimGear with libsvnclient support" ON)

option(ENABLE_RTI "Set to ON to build SimGear with RTI support" OFF)

option(ENABLE_TESTS "Set to OFF to disable building SimGear's test applications" ON)

if (MSVC)

  GET_FILENAME_COMPONENT(PARENT_DIR ${PROJECT_SOURCE_DIR} PATH)

  if (CMAKE_CL_64)

    SET(TEST_3RDPARTY_DIR "${PARENT_DIR}/3rdparty.x64")

  else (CMAKE_CL_64)

    SET(TEST_3RDPARTY_DIR "${PARENT_DIR}/3rdparty")

  endif (CMAKE_CL_64)

  if (EXISTS ${TEST_3RDPARTY_DIR})

    set(MSVC_3RDPARTY_ROOT ${PARENT_DIR} CACHE PATH "Location where the third-party dependencies are extracted")

  else (EXISTS ${TEST_3RDPARTY_DIR})

    set(MSVC_3RDPARTY_ROOT NOT_FOUND CACHE PATH "Location where the third-party dependencies are extracted")

  endif (EXISTS ${TEST_3RDPARTY_DIR})

else (MSVC)

  set(MSVC_3RDPARTY_ROOT NOT_FOUND CACHE PATH "Location where the third-party dependencies are extracted")

endif (MSVC)

if (MSVC AND MSVC_3RDPARTY_ROOT)

  message(STATUS "3rdparty files located in ${MSVC_3RDPARTY_ROOT}")

  set( OSG_MSVC "msvc" )

  if (${MSVC_VERSION} EQUAL 1600)

      set( OSG_MSVC ${OSG_MSVC}100 )

  else (${MSVC_VERSION} EQUAL 1600)

      set( OSG_MSVC ${OSG_MSVC}90 )

  endif (${MSVC_VERSION} EQUAL 1600)

  if (CMAKE_CL_64)

      set( OSG_MSVC ${OSG_MSVC}-64 )

      set( MSVC_3RDPARTY_DIR 3rdParty.x64 )

  else (CMAKE_CL_64)

      set( MSVC_3RDPARTY_DIR 3rdParty )

  endif (CMAKE_CL_64)

  set (CMAKE_LIBRARY_PATH ${MSVC_3RDPARTY_ROOT}/${MSVC_3RDPARTY_DIR}/lib ${MSVC_3RDPARTY_ROOT}/install/${OSG_MSVC}/OpenScenegraph/lib )

  set (CMAKE_INCLUDE_PATH ${MSVC_3RDPARTY_ROOT}/${MSVC_3RDPARTY_DIR}/include ${MSVC_3RDPARTY_ROOT}/install/${OSG_MSVC}/OpenScenegraph/include)

  set (BOOST_ROOT ${MSVC_3RDPARTY_ROOT}/boost_1_44_0)

  message(STATUS "BOOST_ROOT is ${BOOST_ROOT}")

  set (OPENAL_INCLUDE_DIR ${MSVC_3RDPARTY_ROOT}/${MSVC_3RDPARTY_DIR}/include)

  set (ALUT_INCLUDE_DIR ${MSVC_3RDPARTY_ROOT}/${MSVC_3RDPARTY_DIR}/include)

  set (OPENAL_LIBRARY_DIR ${MSVC_3RDPARTY_ROOT}/${MSVC_3RDPARTY_DIR}/lib) 

endif (MSVC AND MSVC_3RDPARTY_ROOT)

find_package(Boost REQUIRED)

set (BOOST_CXX_FLAGS "-DBOOST_MULTI_INDEX_DISABLE_SERIALIZATION -DBOOST_BIMAP_DISABLE_SERIALIZATION")

find_package(ZLIB REQUIRED)

find_package(Threads REQUIRED)

if(SIMGEAR_HEADLESS)

    message(STATUS "headless mode")

else()

    find_package(OpenGL REQUIRED)

    find_package(OpenAL REQUIRED)

    find_package(ALUT REQUIRED)

    find_package(OpenSceneGraph 3.0.0 REQUIRED osgText osgSim osgDB osgParticle osgUtil)

endif(SIMGEAR_HEADLESS)

if(JPEG_FACTORY)

    message(STATUS "JPEG-factory enabled")

    find_package(JPEG REQUIRED)

    include_directories(${JPEG_INCLUDE_DIR})

endif(JPEG_FACTORY)

if(ENABLE_LIBSVN)

	find_package(SvnClient)

	if(LIBSVN_FOUND)

		message(STATUS "libsvn found, enabling in SimGear")

		set(HAVE_SVN_CLIENT_H 1)

		set(HAVE_LIBSVN_CLIENT_1 1)

	else()

		message(STATUS "Missing libsvn, unable to enable SVN in SimGear")

	endif(LIBSVN_FOUND)

endif(ENABLE_LIBSVN)

check_include_file(sys/time.h HAVE_SYS_TIME_H)

check_include_file(sys/timeb.h HAVE_SYS_TIMEB_H)

check_include_file(unistd.h HAVE_UNISTD_H)

check_include_file(windows.h HAVE_WINDOWS_H)

if(ENABLE_RTI)

# See if we have any rti library variant installed

    find_package(RTI)

endif(ENABLE_RTI)

check_function_exists(gettimeofday HAVE_GETTIMEOFDAY)

check_function_exists(ftime HAVE_FTIME)

check_function_exists(timegm HAVE_TIMEGM)

check_function_exists(rint HAVE_RINT)

check_function_exists(mkdtemp HAVE_MKDTEMP)

check_function_exists(bcopy HAVE_BCOPY)

check_function_exists(mmap HAVE_MMAP)

if(HAVE_UNISTD_H)

    set(CMAKE_REQUIRED_INCLUDES ${CMAKE_INCLUDE_PATH})

    check_cxx_source_compiles(

       "#include <unistd.h>

        #if !defined(_POSIX_TIMERS) || (0 >= _POSIX_TIMERS)

            #error clock_gettime is not supported

        #endif

        int main() { return 0; }

        "

        HAVE_CLOCK_GETTIME)

endif(HAVE_UNISTD_H)

set(RT_LIBRARY "")

if(HAVE_CLOCK_GETTIME)

    check_library_exists(rt clock_gettime "" HAVE_RT)

    if(HAVE_RT)

        set(RT_LIBRARY rt)

    endif(HAVE_RT)

endif(HAVE_CLOCK_GETTIME)

SET(CMAKE_DEBUG_POSTFIX "d" CACHE STRING "add a postfix, usually 'd' on windows")

SET(CMAKE_RELEASE_POSTFIX "" CACHE STRING "add a postfix, usually empty on windows")

SET(CMAKE_RELWITHDEBINFO_POSTFIX "" CACHE STRING "add a postfix, usually empty on windows")

SET(CMAKE_MINSIZEREL_POSTFIX "" CACHE STRING "add a postfix, usually empty on windows")

# isnan might not be real symbol, so can't check using function_exists

check_cxx_source_compiles(

    "#include <cmath> 

    void f() { isnan(0.0);} "

    HAVE_ISNAN)

if(CMAKE_COMPILER_IS_GNUCXX)

    set(WARNING_FLAGS_CXX "-Wall")

    set(WARNING_FLAGS_C   "-Wall")

    # certain GCC versions don't provide the atomic builds, and hence

    # require is to provide them in SGAtomic.cxx

    set(CMAKE_REQUIRED_INCLUDES ${CMAKE_INCLUDE_PATH})

    check_cxx_source_compiles(

       "int main() { unsigned mValue; return __sync_add_and_fetch(&mValue, 1); }"

        GCC_ATOMIC_BUILTINS_FOUND)

endif(CMAKE_COMPILER_IS_GNUCXX)

if (CMAKE_CXX_COMPILER_ID STREQUAL "Clang")

   set(WARNING_FLAGS_CXX "-Wall -Wno-overloaded-virtual")

   set(WARNING_FLAGS_C   "-Wall")

endif()

if(WIN32)

    if(MINGW)

        add_definitions(-D_WIN32_WINNT=0x501)

    endif()

    if(MSVC)

        # turn off various warnings

        # foreach(warning 4244 4251 4267 4275 4290 4786 4305 4996)

        #     SET(WARNING_FLAGS "${WARNING_FLAGS} /wd${warning}")

        # endforeach(warning)

        set(MSVC_FLAGS "-DWIN32 -DNOMINMAX -D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -D__CRT_NONSTDC_NO_WARNINGS /wd4996")

    endif(MSVC)

    # assumed on Windows

    set(HAVE_GETLOCALTIME 1)

    set( WINSOCK_LIBRARY "ws2_32.lib" )

    set( RT_LIBRARY "winmm" )

endif(WIN32)

set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${WARNING_FLAGS_C} ${MSVC_FLAGS}")

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${WARNING_FLAGS_CXX} ${MSVC_FLAGS} ${BOOST_CXX_FLAGS}")

include_directories(${PROJECT_SOURCE_DIR})

include_directories(${PROJECT_BINARY_DIR}/simgear)

include_directories(${PROJECT_BINARY_DIR}/simgear/xml)

include_directories(${OPENSCENEGRAPH_INCLUDE_DIRS} 

    ${Boost_INCLUDE_DIRS} ${ZLIB_INCLUDE_DIR} 

    ${ALUT_INCLUDE_DIR} ${OPENAL_INCLUDE_DIR} )

add_definitions(-DHAVE_CONFIG_H)

add_definitions(-DHAVE_EXPAT_CONFIG_H)

# configure a header file to pass some of the CMake settings

# to the source code

configure_file (

  "${PROJECT_SOURCE_DIR}/simgear/simgear_config_cmake.h.in"

  "${PROJECT_BINARY_DIR}/simgear/simgear_config.h"

  )

configure_file (

    "${PROJECT_SOURCE_DIR}/simgear/xml/expat_config_cmake.in"

    "${PROJECT_BINARY_DIR}/simgear/xml/expat_config.h"

)

if(ENABLE_TESTS)

# enable CTest / make test target

include (Dart)

enable_testing()

endif(ENABLE_TESTS)

install (FILES ${PROJECT_BINARY_DIR}/simgear/simgear_config.h  DESTINATION include/simgear/)

add_subdirectory(simgear)

#-----------------------------------------------------------------------------

### uninstall target

#-----------------------------------------------------------------------------

CONFIGURE_FILE(

  "${CMAKE_CURRENT_SOURCE_DIR}/CMakeModules/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")