if ("${CMAKE_SOURCE_DIR}" STREQUAL "${CMAKE_BINARY_DIR}")
  message (FATAL_ERROR
"In-source builds are not allowed. Please create a directory and run cmake "
"from there, passing the path to this source directory as the last argument:"
"
"
"cmake path_to_arts"
"
"
"IMPORTANT: This process created the file 'CMakeCache.txt' and the directory "
"'CMakeFiles'.  Please delete them."
"
"
"If you get this error message although you are in a separate build directory, "
"please check that there is no file 'CMakeCache.txt' and no directory "
"'CMakeFiles' in the arts source directory (not the directory you're "
"currently in).  Please delete them."
)
endif ("${CMAKE_SOURCE_DIR}" STREQUAL "${CMAKE_BINARY_DIR}")

cmake_minimum_required (VERSION 2.6.3)
set (CMAKE_LEGACY_CYGWIN_WIN32 0)

project (ARTS)

enable_testing ()

if (NOT CMAKE_BUILD_TYPE)
  set (CMAKE_BUILD_TYPE "RelWithDebInfo")
endif (NOT CMAKE_BUILD_TYPE)

include (CheckIncludeFile)
include (CheckIncludeFileCXX)

include (CheckCXXCompilerFlag)
include (CheckTypeSize)
include (CheckFunctionExists)

set (CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/cmake/modules")

include (ArtsTestcases)

if ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Intel")
  set (CMAKE_COMPILER_IS_INTELCXX 1)
endif ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Intel")

set (DATA_INSTALL_DIR ${CMAKE_INSTALL_PREFIX}/share/arts)

if (NOT NUMERIC)
  set (NUMERIC double)
endif (NOT NUMERIC)

if (NOT INDEX)
  set (INDEX long)
endif (NOT INDEX)

add_definitions (-DHAVE_CONFIG_H)

if (NO_ASSERT)
  set (CMAKE_C_FLAGS   "${CMAKE_C_FLAGS} -DNDEBUG")
  set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DNDEBUG")
endif (NO_ASSERT)

########### Check C header files ##########
check_include_file (stdlib.h    HAVE_STDLIB_H)
check_include_file (string.h    HAVE_STRING_H)
check_include_file (strings.h   HAVE_STRINGS_H)
check_include_file (sys/stat.h  HAVE_SYS_STAT_H)
check_include_file (sys/times.h HAVE_SYS_TIMES_H)
check_include_file (sys/types.h HAVE_SYS_TYPES_H)
check_include_file (unistd.h    HAVE_UNISTD_H)
check_include_file (getopt.h    HAVE_GETOPT_H)

########### Check C header files for libmicrohttpd ##########
check_include_file (fcntl.h     HAVE_FCNTL_H)
check_include_file (math.h      HAVE_MATH_H)
check_include_file (errno.h     HAVE_ERRNO_H)
check_include_file (limits.h    HAVE_LIMITS_H)
check_include_file (stdio.h     HAVE_STDIO_H)
check_include_file (locale.h    HAVE_LOCALE_H)
check_include_file (pthread.h   HAVE_PTHREAD_H)

########### Check additional C header files for libmicrohttpd ##########
check_include_file (sys/time.h    HAVE_SYS_TIME_H)
check_include_file (sys/msg.h     HAVE_SYS_MSG_H)
check_include_file (netdb.h       HAVE_NETDB_H)
check_include_file (netinet/in.h  HAVE_NETINET_IN_H)
check_include_file (netinet/tcp.h HAVE_NETINET_TCP_H)
check_include_file (sys/socket.h  HAVE_SYS_SOCKET_H)
check_include_file (sys/mman.h    HAVE_SYS_MMAN_H)
check_include_file (arpa/inet.h   HAVE_ARPA_INET_H)
check_include_file (sys/select.h  HAVE_SYS_SELECT_H)
check_include_file (poll.h        HAVE_POLL_H)

########### Check C++ header files ##########
check_include_file_cxx (cstdlib HAVE_CSTDLIB)
check_include_file_cxx (cstring HAVE_CSTRING)
check_include_file_cxx (sstream HAVE_SSTREAM)
check_include_file_cxx (ctime   HAVE_CTIME)

########### Check type sizes ##########
check_type_size("int"    SIZEOF_INT)
check_type_size("long"   SIZEOF_LONG)
check_type_size("size_t" SIZEOF_SIZE_T)
check_type_size("float"  SIZEOF_FLOAT)
check_type_size("double" SIZEOF_DOUBLE)

########### Check functions ##########
check_function_exists(unlink HAVE_REMOVE)

########### Enable timer support, if we have all ##########
########### necessary header files               ##########
if (HAVE_SYS_TYPES_H AND HAVE_UNISTD_H AND HAVE_SYS_STAT_H AND HAVE_CTIME
    AND HAVE_SYS_TIMES_H)
  set (TIME_SUPPORT 1)
endif (HAVE_SYS_TYPES_H AND HAVE_UNISTD_H AND HAVE_SYS_STAT_H AND HAVE_CTIME
  AND HAVE_SYS_TIMES_H)

########### Zlib support ##########
include (FindZLIB)
set (ENABLE_ZLIB ${ZLIB_FOUND})

########### NetCDF support ##########
include (FindNetCDF)

########### OpenMP support ##########
if (NOT NO_OPENMP AND NOT CMAKE_GENERATOR STREQUAL "Xcode")
  include (FindOpenMP)
endif (NOT NO_OPENMP AND NOT CMAKE_GENERATOR STREQUAL "Xcode")

########### Docserver support ##########

if (NOT NO_DOCSERVER)
  set (ENABLE_DOCSERVER true)
endif (NOT NO_DOCSERVER)

########### Disort support ##########
if (ENABLE_DISORT)
  string (TOUPPER ${INDEX} INDEX_UPPER)
  if (NOT SIZEOF_${INDEX_UPPER} EQUAL 4)
    message (STATUS "Forcing Index type to int for compatibility with the f2c library")
    set (INDEX int)
  endif (NOT SIZEOF_${INDEX_UPPER} EQUAL 4)

  check_include_file (f2c.h HAVE_F2C_H)
  if (NOT HAVE_F2C_H)
    message (FATAL_ERROR "cannot find f2c.h which is required for disort")
  endif (NOT HAVE_F2C_H)

  set (NO_WERROR 1)
endif (ENABLE_DISORT)

########### Special flags for certain compilers ##########
if (CMAKE_COMPILER_IS_GNUCXX)
  set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -ftemplate-depth-60")
endif (CMAKE_COMPILER_IS_GNUCXX)

########### Warning flags ##########
if (CMAKE_COMPILER_IS_INTELCXX)
  set (WARN_FLAGS "${WARN_FLAGS} -Wall -Wshadow -w1 -diag-disable 383,980,981,1418,1419")
endif (CMAKE_COMPILER_IS_INTELCXX)
if (CMAKE_COMPILER_IS_GNUCXX)
  set (WARN_FLAGS "${WARN_FLAGS} -W -Wall -Wconversion -Wshadow")
endif (CMAKE_COMPILER_IS_GNUCXX)
if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
  set (WARN_FLAGS "${WARN_FLAGS} -W -Wall -Wconversion -Wno-sign-conversion -Wshadow")
endif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")

if (WERROR)
  set (WARN_FLAGS "${WARN_FLAGS} -Werror")
endif (WERROR)

if (OPENMP_FOUND)
  set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${OpenMP_C_FLAGS}")
  set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${OpenMP_CXX_FLAGS}")
  set (CMAKE_SHARED_LIBRARY_LINK_C_FLAGS "")
  set (CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS "")
else (OPENMP_FOUND)
  set (WARN_FLAGS "${WARN_FLAGS} -Wno-unknown-pragmas")
endif (OPENMP_FOUND)

# Workaround for f2c library in Debian/Ubuntu
if (ENABLE_DISORT AND CMAKE_COMPILER_IS_GNUCXX AND UNIX)
  set (CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS "${CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS} -u MAIN__")
endif (ENABLE_DISORT AND CMAKE_COMPILER_IS_GNUCXX AND UNIX)

string (TOUPPER ${CMAKE_BUILD_TYPE} MY_BUILD_TYPE)
set (COMPILE_FLAGS "${CMAKE_CXX_FLAGS} ${CMAKE_CXX_FLAGS_${MY_BUILD_TYPE}}")

if (CMAKE_COMPILER_IS_INTELCXX)
  set (COMPILER "Intel C++")
else (CMAKE_COMPILER_IS_INTELCXX)
  if (CMAKE_COMPILER_IS_GNUCXX)
    set (COMPILER "GNU C++")
  else (CMAKE_COMPILER_IS_GNUCXX)
    # OLE NOTE: cmake 2.8.1 and earlier identify Clang as GNUCXX!!!
    if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
      set (CMAKE_COMPILER_IS_CLANG 1)
      set (COMPILER "LLVM/Clang")
    else ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
      set (COMPILER "unknown")
    endif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
  endif (CMAKE_COMPILER_IS_GNUCXX)
endif (CMAKE_COMPILER_IS_INTELCXX)

set (COMPILER "${COMPILER} (${CMAKE_CXX_COMPILER})")

if (CMAKE_GENERATOR STREQUAL "Xcode")
  set (COMPILER "Xcode")
endif (CMAKE_GENERATOR STREQUAL "Xcode")

set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${WARN_FLAGS}")
set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${WARN_FLAGS}")

########### Set Operating System name for config.h ##########
if (APPLE)
  set (OS_NAME "Mac OS")
  set (OSX 1)
elseif ("${CMAKE_SYSTEM_NAME}" STREQUAL "CYGWIN")
  set (OS_NAME "Cygwin")
  set (CYGWIN 1)
elseif (UNIX)
  set (OS_NAME "Unix")
  set (LINUX 1)
elseif (WIN)
  set (OS_NAME "Windows")
  set (WINDOWS 1)
endif (APPLE)

set (ARTS_DEFAULT_INCLUDE_DIR "${CMAKE_SOURCE_DIR}/includes")

if (WITH_GUI)
  find_package (Qt4)
  if (QT4_FOUND)
    set (ENABLE_GUI true)
  endif (QT4_FOUND)
endif (WITH_GUI)

configure_file (${CMAKE_CURRENT_SOURCE_DIR}/config.h.cmake
                ${CMAKE_CURRENT_BINARY_DIR}/src/config.h)

add_custom_command (
  OUTPUT auto_version.txt
  COMMAND ${CMAKE_COMMAND} -D "ARTS_SOURCE_DIR:STRING=\"${CMAKE_SOURCE_DIR}\"" -P ${CMAKE_SOURCE_DIR}/cmake/scripts/update_auto_version_txt.cmake
  DEPENDS ChangeLog
)

add_custom_target (UpdateAutoVersion ALL DEPENDS auto_version.txt)

########### subdirectories ###############

add_subdirectory (src)
#add_subdirectory (aii)
add_subdirectory (includes)
add_subdirectory (doc)
add_subdirectory (tests)
#add_subdirectory (3rdparty)