cmake_minimum_required(VERSION 2.8.6)
cmake_policy(VERSION 2.8.6)
project(toxcore)

set(CMAKE_MODULE_PATH ${toxcore_SOURCE_DIR}/cmake)

################################################################################
#
# :: Version management
#
################################################################################

# This version is for the entire project. All libraries (core, av, ...) move in
# versions in a synchronised way.
set(PROJECT_VERSION_MAJOR "0")
set(PROJECT_VERSION_MINOR "1")
set(PROJECT_VERSION_PATCH "10")
set(PROJECT_VERSION "${PROJECT_VERSION_MAJOR}.${PROJECT_VERSION_MINOR}.${PROJECT_VERSION_PATCH}")

# set .so library version / following libtool scheme
# https://www.gnu.org/software/libtool/manual/libtool.html#Updating-version-info
file(STRINGS ${toxcore_SOURCE_DIR}/so.version SOVERSION_CURRENT REGEX "^CURRENT=[0-9]+$")
string(SUBSTRING "${SOVERSION_CURRENT}" 8 -1 SOVERSION_CURRENT)
file(STRINGS ${toxcore_SOURCE_DIR}/so.version SOVERSION_REVISION REGEX "^REVISION=[0-9]+$")
string(SUBSTRING "${SOVERSION_REVISION}" 9 -1 SOVERSION_REVISION)
file(STRINGS ${toxcore_SOURCE_DIR}/so.version SOVERSION_AGE REGEX "^AGE=[0-9]+$")
string(SUBSTRING "${SOVERSION_AGE}" 4 -1 SOVERSION_AGE)
# account for some libtool magic, see other/version-sync script for details
math(EXPR SOVERSION_MAJOR ${SOVERSION_CURRENT}-${SOVERSION_AGE})
set(SOVERSION "${SOVERSION_MAJOR}.${SOVERSION_AGE}.${SOVERSION_REVISION}")
message("SOVERSION: ${SOVERSION}")


################################################################################
#
# :: Dependencies and configuration
#
################################################################################

include(AddCompilerFlag)
include(ApiDsl)
include(CheckCCompilerFlag)
include(CheckCXXCompilerFlag)
include(MacRpath)
include(StrictAbi)

enable_testing()

set(CMAKE_MACOSX_RPATH ON)

if(NOT "${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
  # Set standard version for compiler.
  add_cflag("-std=c99")
  add_cxxflag("-std=c++11")

  # Warn on non-ISO C.
  add_cflag("-pedantic")

  option(WARNINGS "Enable additional compiler warnings" ON)
  if(WARNINGS)
    # Add all warning flags we can.
    add_flag("-Wall")
    add_flag("-Wextra")
    add_flag("-Weverything")

    # Disable specific warning flags for both C and C++.
    add_flag("-Wno-cast-align")
    add_flag("-Wno-conversion")
    add_flag("-Wno-covered-switch-default")
    # Due to clang's tolower() macro being recursive https://github.com/TokTok/c-toxcore/pull/481
    add_flag("-Wno-disabled-macro-expansion")
    add_flag("-Wno-documentation-deprecated-sync")
    add_flag("-Wno-format-nonliteral")
    add_flag("-Wno-missing-field-initializers")
    add_flag("-Wno-missing-prototypes")
    add_flag("-Wno-padded")
    add_flag("-Wno-parentheses")
    add_flag("-Wno-return-type")
    add_flag("-Wno-sign-compare")
    add_flag("-Wno-sign-conversion")
    add_flag("-Wno-tautological-constant-out-of-range-compare")
    # Our use of mutexes results in a false positive, see 1bbe446
    add_flag("-Wno-thread-safety-analysis")
    add_flag("-Wno-type-limits")
    add_flag("-Wno-undef")
    add_flag("-Wno-unreachable-code")
    add_flag("-Wno-unused-macros")
    add_flag("-Wno-unused-parameter")
    add_flag("-Wno-vla")

    # Disable specific warning flags for C.
    add_cflag("-Wno-assign-enum")
    add_cflag("-Wno-bad-function-cast")
    add_cflag("-Wno-double-promotion")
    add_cflag("-Wno-gnu-zero-variadic-macro-arguments")
    add_cflag("-Wno-packed")
    add_cflag("-Wno-reserved-id-macro")
    add_cflag("-Wno-shadow")
    add_cflag("-Wno-shorten-64-to-32")
    add_cflag("-Wno-unreachable-code-return")
    add_cflag("-Wno-unused-but-set-variable")
    add_cflag("-Wno-used-but-marked-unused")

    # Disable specific warning flags for C++.
    add_cxxflag("-Wno-c++11-compat")
    add_cxxflag("-Wno-c++11-extensions")
    add_cxxflag("-Wno-c++11-narrowing")
    add_cxxflag("-Wno-c99-extensions")
    add_cxxflag("-Wno-narrowing")
    add_cxxflag("-Wno-old-style-cast")
    add_cxxflag("-Wno-variadic-macros")
    add_cxxflag("-Wno-vla-extension")
  endif()

  option(ERROR_ON_WARNING "Make compilation error on a warning" OFF)
  if(ERROR_ON_WARNING)
    # Set error-on-warn for C compilation. C++ compilation can't use this because
    # treating 'c' input as 'c++' when in C++ mode is deprecated in clang and
    # there is no way to turn off that warning.
    add_cflag("-Werror")
  endif()

  option(DEBUG "Enable assertions and other debugging facilities" OFF)
  if(DEBUG)
    set(MIN_LOGGER_LEVEL DEBUG)
    add_cflag("-g3")
  endif()
endif()

option(TRACE "Enable TRACE level logging (expensive, for network debugging)" OFF)
if(TRACE)
  set(MIN_LOGGER_LEVEL TRACE)
endif()

if(MIN_LOGGER_LEVEL)
  add_definitions(-DMIN_LOGGER_LEVEL=LOG_${MIN_LOGGER_LEVEL})
endif()

option(ASAN "Enable address-sanitizer to detect invalid memory accesses" OFF)
if(ASAN)
  set(SAFE_CMAKE_REQUIRED_LIBRARIES "${CMAKE_REQUIRED_LIBRARIES}")
  set(CMAKE_REQUIRED_LIBRARIES "-fsanitize=address")
  add_cflag("-fsanitize=address")
  set(CMAKE_REQUIRED_LIBRARIES "${SAFE_CMAKE_REQUIRED_LIBRARIES}")
else()
  # Forbid undefined symbols in shared libraries. This is incompatible with
  # asan, so it's in the else branch here.
  add_dllflag("-Wl,-z,defs")
endif()

option(BUILD_TOXAV "Whether to build the tox AV library" ON)

include(Dependencies)

if(BUILD_TOXAV)
  if(NOT OPUS_FOUND)
    message(SEND_ERROR "Option BUILD_TOXAV is enabled but required library OPUS was not found.")
  endif()
  if(NOT VPX_FOUND)
    message(SEND_ERROR "Option BUILD_TOXAV is enabled but required library VPX was not found.")
  endif()
endif()

################################################################################
#
# :: Tox Core Library
#
################################################################################

# toxcore_PKGCONFIG_LIBS is what's added to the Libs: line in toxcore.pc. It
# needs to contain all the libraries a program using toxcore should link against
# if it's statically linked. If it's dynamically linked, there is no need to
# explicitly link against all the dependencies, but it doesn't harm much(*)
# either.
#
# (*) It allows client code to use symbols from our dependencies without
#    explicitly linking against them.
set(toxcore_PKGCONFIG_LIBS)

# LAYER 1: Crypto core
# --------------------
apidsl(toxcore/crypto_core.api.h)
add_module(toxcrypto
  toxcore/ccompat.h
  toxcore/crypto_core.c
  toxcore/crypto_core.h
  toxcore/crypto_core_mem.c)
include(CheckFunctionExists)
check_function_exists(explicit_bzero HAVE_EXPLICIT_BZERO)
check_function_exists(memset_s HAVE_MEMSET_S)
target_link_modules(toxcrypto ${LIBSODIUM_LIBRARIES})

# LAYER 2: Basic networking
# -------------------------
add_module(toxnetwork
  toxcore/logger.c
  toxcore/logger.h
  toxcore/network.c
  toxcore/network.h
  toxcore/util.c
  toxcore/util.h)
target_link_modules(toxnetwork toxcrypto)

if(CMAKE_THREAD_LIBS_INIT)
  target_link_modules(toxnetwork ${CMAKE_THREAD_LIBS_INIT})
  set(toxcore_PKGCONFIG_LIBS ${toxcore_PKGCONFIG_LIBS} ${CMAKE_THREAD_LIBS_INIT})
endif()

if(RT_LIBRARIES)
  target_link_modules(toxnetwork ${RT_LIBRARIES})
  set(toxcore_PKGCONFIG_LIBS ${toxcore_PKGCONFIG_LIBS} "-lrt")
endif()

if(WIN32)
  target_link_modules(toxnetwork ws2_32 iphlpapi)
  set(toxcore_PKGCONFIG_LIBS ${toxcore_PKGCONFIG_LIBS} "-lws2_32 -liphlpapi")
endif()

# LAYER 3: Distributed Hash Table
# -------------------------------
add_module(toxdht
  toxcore/DHT.c
  toxcore/DHT.h
  toxcore/LAN_discovery.c
  toxcore/LAN_discovery.h
  toxcore/ping.c
  toxcore/ping.h
  toxcore/ping_array.c
  toxcore/ping_array.h)
target_link_modules(toxdht toxnetwork)

# LAYER 4: Onion routing, TCP connections, crypto connections
# -----------------------------------------------------------
add_module(toxnetcrypto
  toxcore/TCP_client.c
  toxcore/TCP_client.h
  toxcore/TCP_connection.c
  toxcore/TCP_connection.h
  toxcore/TCP_server.c
  toxcore/TCP_server.h
  toxcore/list.c
  toxcore/list.h
  toxcore/net_crypto.c
  toxcore/net_crypto.h
  toxcore/onion.c
  toxcore/onion.h
  toxcore/onion_announce.c
  toxcore/onion_announce.h
  toxcore/onion_client.c
  toxcore/onion_client.h)
target_link_modules(toxnetcrypto toxdht)

# LAYER 5: Friend requests and connections
# ----------------------------------------
add_module(toxfriends
  toxcore/friend_connection.c
  toxcore/friend_connection.h
  toxcore/friend_requests.c
  toxcore/friend_requests.h)
target_link_modules(toxfriends toxnetcrypto)

# LAYER 6: Tox messenger
# ----------------------
add_module(toxmessenger
  toxcore/Messenger.c
  toxcore/Messenger.h)
target_link_modules(toxmessenger toxfriends)

# LAYER 7: Group chats
# --------------------
add_module(toxgroup
  toxcore/group.c
  toxcore/group.h)
target_link_modules(toxgroup toxmessenger)

# LAYER 8: Public API
# -------------------
apidsl(toxcore/tox.api.h)
add_module(toxcore
  toxcore/tox_api.c
  toxcore/tox.c
  toxcore/tox.h)
target_link_modules(toxcore toxgroup)

################################################################################
#
# :: Audio/Video Library
#
################################################################################

if(BUILD_TOXAV)
  apidsl(toxav/toxav.api.h)
  add_module(toxav
    toxav/audio.c
    toxav/audio.h
    toxav/bwcontroller.c
    toxav/bwcontroller.h
    toxav/groupav.c
    toxav/groupav.h
    toxav/msi.c
    toxav/msi.h
    toxav/ring_buffer.c
    toxav/ring_buffer.h
    toxav/rtp.c
    toxav/rtp.h
    toxav/toxav.c
    toxav/toxav.h
    toxav/toxav_old.c
    toxav/video.c
    toxav/video.h)
  target_link_modules(toxav toxcore ${OPUS_LIBRARIES} ${VPX_LIBRARIES})
endif()

################################################################################
#
# :: ToxDNS and block encryption libraries
#
################################################################################

add_module(toxdns
  toxdns/toxdns.c)
target_link_modules(toxdns toxcore)

apidsl(toxencryptsave/toxencryptsave.api.h)
add_module(toxencryptsave
  toxencryptsave/toxencryptsave.c
  toxencryptsave/toxencryptsave.h)
target_link_modules(toxencryptsave toxcore)

################################################################################
#
# :: Tox specification tests
#
################################################################################

find_program(SPECTEST NAMES tox-spectest)

if(NOT SPECTEST)
  find_program(STACK NAMES stack)
  if(STACK)
    set(SPECTEST
      ${STACK} --stack-yaml ${toxcore_SOURCE_DIR}/../stack.yaml exec --
      tox-spectest)
  endif()
endif()

if(MSGPACK_FOUND)
  add_c_executable(toxcore-sut
    testing/hstox/binary_decode.c
    testing/hstox/binary_encode.c
    testing/hstox/driver.c
    testing/hstox/methods.c
    testing/hstox/packet_kinds.c
    testing/hstox/test_main.c
    testing/hstox/util.c)
  target_link_modules(toxcore-sut
    toxcore
    ${MSGPACK_LIBRARIES})
  if(SPECTEST)
    add_test(NAME spectest COMMAND ${SPECTEST} $<TARGET_FILE:toxcore-sut>)
  endif()
endif()

################################################################################
#
# :: Automated regression tests
#
################################################################################

set(TEST_TIMEOUT_SECONDS "" CACHE STRING "Limit runtime of each test to the number of seconds specified")

option(FORMAT_TEST "Require the format_test to be executed; fail cmake if it can't" OFF)

if(APIDSL AND ASTYLE)
  add_test(
    NAME format_test
    COMMAND ${toxcore_SOURCE_DIR}/other/astyle/format-source
      "${toxcore_SOURCE_DIR}"
      "${APIDSL}"
      "${ASTYLE}")
  set_tests_properties(format_test PROPERTIES TIMEOUT "${TEST_TIMEOUT_SECONDS}")
elseif(FORMAT_TEST)
  message(FATAL_ERROR "format_test can not be run, because either APIDSL (${APIDSL}) or ASTYLE (${ASTYLE}) could not be found")
endif()

function(auto_test target)
  if(CHECK_FOUND AND NOT ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC" AND ARGV1 STREQUAL "MSVC_DONT_BUILD"))
    add_c_executable(auto_${target}_test auto_tests/${target}_test.c)
    target_link_modules(auto_${target}_test
      toxcore
      toxencryptsave
      ${CHECK_LIBRARIES})
    if(BUILD_TOXAV)
      target_link_modules(auto_${target}_test toxav)
    endif()
    if(NOT ARGV1 STREQUAL "DONT_RUN")
      add_test(NAME ${target} COMMAND auto_${target}_test)
      set_tests_properties(${target} PROPERTIES TIMEOUT "${TEST_TIMEOUT_SECONDS}")
    endif()
  endif()
endfunction()

if(BUILD_TOXAV)
  add_c_executable(auto_monolith_test auto_tests/monolith_test.c)
  target_link_modules(auto_monolith_test
    ${LIBSODIUM_LIBRARIES}
    ${OPUS_LIBRARIES}
    ${VPX_LIBRARIES}
    ${toxcore_PKGCONFIG_LIBS})
  add_test(NAME monolith COMMAND auto_monolith_test)
endif()

auto_test(TCP)
auto_test(conference)
auto_test(crypto                        MSVC_DONT_BUILD)
auto_test(dht                           MSVC_DONT_BUILD)
auto_test(encryptsave)
auto_test(messenger                     MSVC_DONT_BUILD)
auto_test(network)
auto_test(onion)
auto_test(resource_leak)
auto_test(save_friend)
auto_test(skeleton)
auto_test(tox)
auto_test(tox_many)
auto_test(tox_many_tcp)
auto_test(tox_one)
auto_test(tox_strncasecmp)
auto_test(version)
# TODO(iphydf): These tests are broken. The code needs to be fixed, as the
# tests themselves are correct.
auto_test(selfname_change_conference    DONT_RUN)
auto_test(self_conference_title_change  DONT_RUN)

if(BUILD_TOXAV)
  auto_test(toxav_basic)
  auto_test(toxav_many)
endif()

################################################################################
#
# :: Bootstrap daemon
#
################################################################################

option(DHT_BOOTSTRAP "Enable building of DHT_bootstrap" ON)
if(DHT_BOOTSTRAP)
  add_c_executable(DHT_bootstrap
    other/DHT_bootstrap.c
    other/bootstrap_node_packets.c)
  target_link_modules(DHT_bootstrap toxnetcrypto)
endif()

option(BOOTSTRAP_DAEMON "Enable building of tox-bootstrapd" ON)
if(BOOTSTRAP_DAEMON)
  if(WIN32)
    message(FATAL_ERROR "Building tox-bootstrapd for Windows is not supported")
  endif()
  if(LIBCONFIG_FOUND)
    add_c_executable(tox-bootstrapd
      other/bootstrap_daemon/src/command_line_arguments.c
      other/bootstrap_daemon/src/command_line_arguments.h
      other/bootstrap_daemon/src/config.c
      other/bootstrap_daemon/src/config.h
      other/bootstrap_daemon/src/config_defaults.h
      other/bootstrap_daemon/src/global.h
      other/bootstrap_daemon/src/log.c
      other/bootstrap_daemon/src/log.h
      other/bootstrap_daemon/src/log_backend_stdout.c
      other/bootstrap_daemon/src/log_backend_stdout.h
      other/bootstrap_daemon/src/log_backend_syslog.c
      other/bootstrap_daemon/src/log_backend_syslog.h
      other/bootstrap_daemon/src/tox-bootstrapd.c
      other/bootstrap_node_packets.c
      other/bootstrap_node_packets.h)
    target_link_modules(tox-bootstrapd toxnetcrypto ${LIBCONFIG_LIBRARIES})
    install(TARGETS tox-bootstrapd RUNTIME DESTINATION bin)
  endif()
endif()

################################################################################
#
# :: Test programs
#
################################################################################

option(BUILD_AV_TEST "Build toxav test" ON)
if(NOT WIN32
   AND BUILD_AV_TEST AND BUILD_TOXAV
   AND SNDFILE_FOUND AND PORTAUDIO_FOUND AND OPENCV_FOUND)
  add_c_executable(av_test testing/av_test.c)
  target_link_modules(av_test
    toxav
    ${OPENCV_LIBRARIES}
    ${PORTAUDIO_LIBRARIES}
    ${SNDFILE_LIBRARIES})
  # Due to https://github.com/opencv/opencv/issues/6585, we need to compile
  # av_test as C++ for newer OpenCV versions.
  if(NOT OPENCV_VERSION VERSION_LESS 3)
    set_source_files_properties(testing/av_test.c PROPERTIES LANGUAGE CXX)
  endif()
endif()

option(BUILD_NTOX "Build nTox client" OFF)
if(BUILD_NTOX AND NOT WIN32)
  add_c_executable(nTox testing/nTox.c)
  target_link_modules(nTox toxcore ${NCURSES_LIBRARIES})
endif()

add_c_executable(DHT_test testing/DHT_test.c)
target_link_modules(DHT_test toxdht)

add_c_executable(Messenger_test testing/Messenger_test.c)
target_link_modules(Messenger_test toxmessenger)

add_c_executable(dns3_test testing/dns3_test.c)
target_link_modules(dns3_test toxdns)

if(NOT WIN32)
  add_c_executable(tox_sync testing/tox_sync.c)
  target_link_modules(tox_sync toxcore)
endif()

if(UTIL_LIBRARIES)
  add_c_executable(tox_shell testing/tox_shell.c)
  target_link_modules(tox_shell toxcore ${UTIL_LIBRARIES})
endif()

if(NOT WIN32)
  add_c_executable(irc_syncbot testing/irc_syncbot.c)
  target_link_modules(irc_syncbot toxcore)
endif()

################################################################################
#
# :: Installation and pkg-config
#
################################################################################

string(REPLACE ";" " " toxcore_PKGCONFIG_LIBS "${toxcore_PKGCONFIG_LIBS}")

if(BUILD_TOXAV)
  configure_file(
    "${toxcore_SOURCE_DIR}/other/pkgconfig/toxav.pc.in"
    "${CMAKE_BINARY_DIR}/toxav.pc"
    @ONLY
  )
endif()

configure_file(
  "${toxcore_SOURCE_DIR}/other/pkgconfig/toxcore.pc.in"
  "${CMAKE_BINARY_DIR}/toxcore.pc"
  @ONLY
)

configure_file(
  "${toxcore_SOURCE_DIR}/other/pkgconfig/toxdns.pc.in"
  "${CMAKE_BINARY_DIR}/toxdns.pc"
  @ONLY
)

configure_file(
  "${toxcore_SOURCE_DIR}/other/pkgconfig/toxencryptsave.pc.in"
  "${CMAKE_BINARY_DIR}/toxencryptsave.pc"
  @ONLY
)

configure_file(
  "${toxcore_SOURCE_DIR}/other/pkgconfig/libtoxcore.pc.in"
  "${CMAKE_BINARY_DIR}/libtoxcore.pc"
  @ONLY
)

configure_file(
  "${toxcore_SOURCE_DIR}/other/pkgconfig/libtoxav.pc.in"
  "${CMAKE_BINARY_DIR}/libtoxav.pc"
  @ONLY
)

install(FILES
  ${CMAKE_BINARY_DIR}/libtoxcore.pc
  ${CMAKE_BINARY_DIR}/toxcore.pc
  ${CMAKE_BINARY_DIR}/toxdns.pc
  ${CMAKE_BINARY_DIR}/toxencryptsave.pc
  DESTINATION "lib/pkgconfig")
install(FILES
  toxcore/tox.h
  toxdns/toxdns.h
  toxencryptsave/toxencryptsave.h
  DESTINATION "include/tox")

if(BUILD_TOXAV)
  install(FILES
    ${CMAKE_BINARY_DIR}/libtoxav.pc
    ${CMAKE_BINARY_DIR}/toxav.pc
    DESTINATION "lib/pkgconfig")
  install(FILES
    toxav/toxav.h
    DESTINATION "include/tox")
endif()

if(STRICT_ABI AND SHELL AND ENABLE_SHARED)
  if(BUILD_TOXAV)
    make_version_script(${toxcore_SOURCE_DIR}/toxav/toxav.h toxav toxav)
  endif()
  make_version_script(${toxcore_SOURCE_DIR}/toxcore/tox.h tox toxcore)
endif()