libdatachannel/CMakeLists.txt

cmake_minimum_required (VERSION 3.7)
project (libdatachannel
	DESCRIPTION "WebRTC DataChannels Library"
	VERSION 0.4.7
	LANGUAGES CXX)

option(USE_GNUTLS "Use GnuTLS instead of OpenSSL" OFF)
option(USE_JUICE "Use libjuice instead of libnice" OFF)

if(USE_GNUTLS)
	option(USE_NETTLE "Use Nettle instead of OpenSSL in libjuice" ON)
else()
	option(USE_NETTLE "Use Nettle instead of OpenSSL in libjuice" OFF)
endif()

set(CMAKE_POSITION_INDEPENDENT_CODE ON)
set(CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR}/cmake/Modules)

if(WIN32)
	if (MSYS OR MINGW)
		add_definitions(-DSCTP_STDINT_INCLUDE=<stdint.h>)
	endif()
endif()

set(LIBDATACHANNEL_SOURCES
	${CMAKE_CURRENT_SOURCE_DIR}/src/candidate.cpp
	${CMAKE_CURRENT_SOURCE_DIR}/src/certificate.cpp
	${CMAKE_CURRENT_SOURCE_DIR}/src/channel.cpp
	${CMAKE_CURRENT_SOURCE_DIR}/src/configuration.cpp
	${CMAKE_CURRENT_SOURCE_DIR}/src/datachannel.cpp
	${CMAKE_CURRENT_SOURCE_DIR}/src/description.cpp
	${CMAKE_CURRENT_SOURCE_DIR}/src/dtlstransport.cpp
	${CMAKE_CURRENT_SOURCE_DIR}/src/icetransport.cpp
	${CMAKE_CURRENT_SOURCE_DIR}/src/peerconnection.cpp
	${CMAKE_CURRENT_SOURCE_DIR}/src/rtc.cpp
	${CMAKE_CURRENT_SOURCE_DIR}/src/sctptransport.cpp
)

set(TESTS_SOURCES
    ${CMAKE_CURRENT_SOURCE_DIR}/test/main.cpp
    ${CMAKE_CURRENT_SOURCE_DIR}/test/connectivity.cpp
    ${CMAKE_CURRENT_SOURCE_DIR}/test/capi.cpp
)

set(TESTS_OFFERER_SOURCES
    ${CMAKE_CURRENT_SOURCE_DIR}/test/p2p/offerer.cpp
)

set(TESTS_ANSWERER_SOURCES
    ${CMAKE_CURRENT_SOURCE_DIR}/test/p2p/answerer.cpp
)

set(JSON_BuildTests OFF CACHE INTERNAL "")
add_subdirectory(deps/json)

set(THREADS_PREFER_PTHREAD_FLAG ON)
find_package(Threads REQUIRED)

add_subdirectory(deps/usrsctp EXCLUDE_FROM_ALL)
add_library(Usrsctp::Usrsctp ALIAS usrsctp)
add_library(Usrsctp::UsrsctpStatic ALIAS usrsctp-static)

add_library(datachannel SHARED ${LIBDATACHANNEL_SOURCES})
set_target_properties(datachannel PROPERTIES
	VERSION ${PROJECT_VERSION}
	CXX_STANDARD 17)

target_include_directories(datachannel PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/include)
target_include_directories(datachannel PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/include/rtc)
target_include_directories(datachannel PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/src)
target_include_directories(datachannel PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/deps/plog/include)
target_link_libraries(datachannel Threads::Threads Usrsctp::UsrsctpStatic)

add_library(datachannel-static STATIC EXCLUDE_FROM_ALL ${LIBDATACHANNEL_SOURCES})
set_target_properties(datachannel-static PROPERTIES
	VERSION ${PROJECT_VERSION}
	CXX_STANDARD 17)

target_include_directories(datachannel-static PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/include)
target_include_directories(datachannel-static PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/include/rtc)
target_include_directories(datachannel-static PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/src)
target_include_directories(datachannel-static PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/deps/plog/include)
target_link_libraries(datachannel-static Threads::Threads Usrsctp::UsrsctpStatic)

if(WIN32)
	target_link_libraries(datachannel "wsock32" "ws2_32") # winsock2
	target_link_libraries(datachannel-static "wsock32" "ws2_32") # winsock2
endif()

if (USE_GNUTLS)
	find_package(GnuTLS REQUIRED)
	if(NOT TARGET GnuTLS::GnuTLS)
		add_library(GnuTLS::GnuTLS UNKNOWN IMPORTED)
		set_target_properties(GnuTLS::GnuTLS PROPERTIES
			INTERFACE_INCLUDE_DIRECTORIES "${GNUTLS_INCLUDE_DIRS}"
			INTERFACE_COMPILE_DEFINITIONS "${GNUTLS_DEFINITIONS}"
			IMPORTED_LINK_INTERFACE_LANGUAGES "C"
			IMPORTED_LOCATION "${GNUTLS_LIBRARIES}")
	endif()
	target_compile_definitions(datachannel PRIVATE USE_GNUTLS=1)
	target_link_libraries(datachannel GnuTLS::GnuTLS)
	target_compile_definitions(datachannel-static PRIVATE USE_GNUTLS=1)
	target_link_libraries(datachannel-static GnuTLS::GnuTLS)
else()
	find_package(OpenSSL REQUIRED)
	target_compile_definitions(datachannel PRIVATE USE_GNUTLS=0)
	target_link_libraries(datachannel OpenSSL::SSL)
	target_compile_definitions(datachannel-static PRIVATE USE_GNUTLS=0)
	target_link_libraries(datachannel-static OpenSSL::SSL)
endif()

if (USE_JUICE)
	add_subdirectory(deps/libjuice EXCLUDE_FROM_ALL)
	target_compile_definitions(datachannel PRIVATE USE_JUICE=1)
	target_link_libraries(datachannel LibJuice::LibJuiceStatic)
	target_compile_definitions(datachannel-static PRIVATE USE_JUICE=1)
	target_link_libraries(datachannel-static LibJuice::LibJuiceStatic)
else()
	find_package(LibNice REQUIRED)
	target_compile_definitions(datachannel PRIVATE USE_JUICE=0)
	target_link_libraries(datachannel LibNice::LibNice)
	target_compile_definitions(datachannel-static PRIVATE USE_JUICE=0)
	target_link_libraries(datachannel-static LibNice::LibNice)
endif()

add_library(LibDataChannel::LibDataChannel ALIAS datachannel)
add_library(LibDataChannel::LibDataChannelStatic ALIAS datachannel-static)

# Main Test
add_executable(datachannel-tests ${TESTS_SOURCES})
set_target_properties(datachannel-tests PROPERTIES
	VERSION ${PROJECT_VERSION}
	CXX_STANDARD 17)
set_target_properties(datachannel-tests PROPERTIES OUTPUT_NAME tests)
target_include_directories(datachannel-tests PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/src)
target_link_libraries(datachannel-tests datachannel nlohmann_json::nlohmann_json)

# P2P Test: offerer
add_executable(datachannel-offerer ${TESTS_OFFERER_SOURCES})
set_target_properties(datachannel-offerer PROPERTIES
	VERSION ${PROJECT_VERSION}
	CXX_STANDARD 17)
set_target_properties(datachannel-offerer PROPERTIES OUTPUT_NAME offerer)
target_link_libraries(datachannel-offerer datachannel)
target_include_directories(datachannel-offerer PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/deps/httplib)
target_include_directories(datachannel-offerer PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/deps/json/include)

# P2P Test: answerer
add_executable(datachannel-answerer ${TESTS_ANSWERER_SOURCES})
set_target_properties(datachannel-answerer PROPERTIES
	VERSION ${PROJECT_VERSION}
	CXX_STANDARD 17)
set_target_properties(datachannel-answerer PROPERTIES OUTPUT_NAME answerer)
target_link_libraries(datachannel-answerer datachannel)