CMakeLists.txt

# CMakeLists.txt for the C-core library of Pubnub.
cmake_minimum_required(VERSION 3.12)

# Project name and version for casual builds
# For ESP32 builds it is considered as a IDF component
if(NOT ESP_PLATFORM)
    project(pubnub VERSION 4.8.0)
endif()

message(STATUS Preparing\ ${PROJECT_NAME}\ version\ ${PROJECT_VERSION})

# Function to convert between "ON"/"OFF" and 1/0
function(num_option name description default)
    option(${name} ${description} ${default})
    if(${name})
        message(STATUS "[*] ${name}")
        set(${name} 1 PARENT_SCOPE)
    else()
        message(STATUS "[ ] ${name}")
        set(${name} 0 PARENT_SCOPE)
    endif()
endfunction()

# Function to log a option and its value
function(log_option name description default)
    option(${name} ${description} ${default})
    if(${name})
        message(STATUS "[*] ${name}")
    else()
        message(STATUS "[ ] ${name}")
    endif()
endfunction()

# Function to log a set and its value
function(log_set name default description)
    set(${name} ${default} CACHE STRING ${description})
    message(STATUS "${name}:${${name}}")
endfunction()

# All the options that can be set on the command line to control

message(STATUS "Options (Enabled *):")

log_option(OPENSSL "Use OpenSSL" OFF)
num_option(MBEDTLS "Use mbedTLS" ON)
log_option(EXAMPLES "Build all examples" OFF)
log_option(SHARED_LIB "Library type. [SHARED=ON STATIC=OFF]" OFF)
log_option(WITH_CPP "Build the CPP headers" OFF)
log_option(ASAN "Use Address sanitizer" OFF)

if (WITH_CPP)
    set(DEFAULT_USE_CALLBACK_API ON)
else()
    set(DEFAULT_USE_CALLBACK_API OFF)
endif()

log_option(USE_CPP11 "Use C++11 [WITH_CPP=ON needed]" OFF)
log_option(UNIT_TEST "Build and run unit tests" OFF)
num_option(ONLY_PUBSUB_API "Only pubsub API" OFF)
num_option(USE_PROXY "Use proxy" OFF)
num_option(USE_GZIP_COMPRESSION "Use gzip compression" OFF)
num_option(RECEIVE_GZIP_RESPONSE "Use gzip decompression" OFF)
num_option(USE_SUBSCRIBE_V2 "Use subscribe v2" OFF)
num_option(USE_ADVANCED_HISTORY "Use advanced history" OFF)
num_option(USE_OBJECTS_API "Use objects API" OFF)
num_option(USE_AUTO_HEARTBEAT "Use auto heartbeat" OFF)
num_option(USE_ACTIONS_API "Use actions API" OFF)
num_option(USE_REVOKE_TOKEN_API "Use revoke token API" OFF)
num_option(USE_GRANT_TOKEN_API "Use grant token API" OFF)
num_option(USE_FETCH_HISTORY "Use fetch history" OFF)
num_option(USE_CRYPTO_API "Use crypto API [OPENSSL ONLY]" OFF)
num_option(USE_CALLBACK_API "Use callback API [CALLBACK=ON SYNC=OFF]" ${DEFAULT_USE_CALLBACK_API})
num_option(USE_IPV6 "Use IPv6 [CALLBACK=ON]" ${DEFAULT_USE_CALLBACK_API})
num_option(USE_SET_DNS_SERVERS "Use set DNS servers [CALLBACK=ON]" ${DEFAULT_USE_CALLBACK_API})
num_option(USE_EXTERN_API "Use extern C API [WITH_CPP=ON]" ON)
num_option(USE_LEGACY_CRYPTO_RANDOM_IV "Use random IV for legacy crypto module [OpenSSL only]" ON)
log_set(OPENSSL_ROOT_DIR "" "OpenSSL root directory (leave empty for find_package() defaults)[OPENSSL=ON needed]")
log_set(CUSTOM_OPENSSL_LIB_DIR "lib" "OpenSSL lib directory relative to OPENSSL_ROOT_DIR [used only if find_package() failed]")
log_set(CUSTOM_OPENSSL_INCLUDE_DIR "include" "OpenSSL include directory relative to OPENSSL_ROOT_DIR [used only if find_package() failed]")
log_set(EXAMPLE "all" "Build example with provided name (use 'all' for all examples) [EXAMPLES=ON needed]")
log_set(CGREEN_ROOT_DIR "${CMAKE_CURRENT_LIST_DIR}/cgreen" "CGreen root directory [UNIT_TEST=ON needed]")
log_set(LOG_LEVEL "WARNING" "Log level [TRACE/DEBUG/INFO/WARNING/ERROR]")

if (${OPENSSL} AND ${MBEDTLS})
    message(FATAL_ERROR "You can't use both OpenSSL and mbedTLS at the same time!")
endif()

# Flags configuration

set(FLAGS "\
    -g \
    -Wall \
    -D PUBNUB_THREADSAFE \
    -D PUBNUB_LOG_LEVEL=PUBNUB_LOG_LEVEL_${LOG_LEVEL} \
    -D PUBNUB_ONLY_PUBSUB_API=${ONLY_PUBSUB_API} \
    -D PUBNUB_PROXY_API=${USE_PROXY} \
    -D PUBNUB_USE_GZIP_COMPRESSION=${USE_GZIP_COMPRESSION} \
    -D PUBNUB_RECEIVE_GZIP_RESPONSE=${RECEIVE_GZIP_RESPONSE} \
    -D PUBNUB_USE_SUBSCRIBE_V2=${USE_SUBSCRIBE_V2} \
    -D PUBNUB_USE_OBJECTS_API=${USE_OBJECTS_API} \
    -D PUBNUB_USE_ACTIONS_API=${USE_ACTIONS_API} \
    -D PUBNUB_USE_AUTO_HEARTBEAT=${USE_AUTO_HEARTBEAT} \
    -D PUBNUB_USE_GRANT_TOKEN_API=${USE_GRANT_TOKEN_API} \
    -D PUBNUB_USE_REVOKE_TOKEN_API=${USE_REVOKE_TOKEN_API} \
    -D PUBNUB_USE_FETCH_HISTORY=${USE_FETCH_HISTORY} \
    -D PUBNUB_RAND_INIT_VECTOR=${USE_LEGACY_CRYPTO_RANDOM_IV} \
    -D PUBNUB_MBEDTLS=${MBEDTLS}")
    
set(LDLIBS)
set(OS_SOURCEFILES)

if (${USE_CALLBACK_API})
    set(FLAGS "\
        ${FLAGS} \
        -D PUBNUB_SET_DNS_SERVERS=${USE_SET_DNS_SERVERS} \
        -D PUBNUB_USE_IPV6=${USE_IPV6} \
        -D PUBNUB_CALLBACK_API")
endif()

if (${ASAN})
    set(FLAGS "\
        ${FLAGS} \
        -fsanitize=address")
    set(LDLIBS "\
        ${LDLIBS} \
        -fsanitize=address")
endif()

set(CMAKE_C_FLAGS "\
    ${FLAGS} \
    ${CMAKE_C_FLAGS}")

if(${WITH_CPP})
    set(CMAKE_CXX_FLAGS "\
        ${FLAGS} \
        -D PUBNUB_USE_EXTERN_C=${USE_EXTERN_API} \
        ${CMAKE_CXX_FLAGS}")

    if(${USE_CPP11})
        set(CMAKE_CXX_FLAGS "\
            ${CMAKE_CXX_FLAGS} \
            -std=c++11")
    endif()
endif()

set(CORE_SOURCEFILES 
    ${CMAKE_CURRENT_LIST_DIR}/core/pbcc_set_state.c
    ${CMAKE_CURRENT_LIST_DIR}/core/pubnub_pubsubapi.c
    ${CMAKE_CURRENT_LIST_DIR}/core/pubnub_coreapi.c
    ${CMAKE_CURRENT_LIST_DIR}/core/pubnub_coreapi_ex.c
    ${CMAKE_CURRENT_LIST_DIR}/core/pubnub_ccore_pubsub.c
    ${CMAKE_CURRENT_LIST_DIR}/core/pubnub_ccore.c
    ${CMAKE_CURRENT_LIST_DIR}/core/pubnub_netcore.c
    ${CMAKE_CURRENT_LIST_DIR}/core/pubnub_blocking_io.c
    ${CMAKE_CURRENT_LIST_DIR}/core/pubnub_timers.c
    ${CMAKE_CURRENT_LIST_DIR}/core/pubnub_json_parse.c
    ${CMAKE_CURRENT_LIST_DIR}/core/pubnub_helper.c
    ${CMAKE_CURRENT_LIST_DIR}/core/pubnub_generate_uuid_v3_md5.c
    ${CMAKE_CURRENT_LIST_DIR}/core/pubnub_free_with_timeout_std.c
    ${CMAKE_CURRENT_LIST_DIR}/core/pubnub_url_encode.c) 

set(LIB_SOURCEFILES
    ${CMAKE_CURRENT_LIST_DIR}/lib/sockets/pbpal_handle_socket_error.c
    ${CMAKE_CURRENT_LIST_DIR}/lib/base64/pbbase64.c
    ${CMAKE_CURRENT_LIST_DIR}/lib/pb_strnlen_s.c
    ${CMAKE_CURRENT_LIST_DIR}/lib/pb_strncasecmp.c
    ${CMAKE_CURRENT_LIST_DIR}/lib/pubnub_dns_codec.c)

if(UNIX OR WIN32 OR WIN64 OR MSVC)
    set(CORE_SOURCEFILES
        ${CORE_SOURCEFILES}
        ${CMAKE_CURRENT_LIST_DIR}/core/pubnub_alloc_std.c
        ${CMAKE_CURRENT_LIST_DIR}/core/pubnub_generate_uuid.c
        ${CMAKE_CURRENT_LIST_DIR}/core/pubnub_assert_std.c)

    set(LIB_SOURCEFILES
        ${CMAKE_CURRENT_LIST_DIR}/lib/sockets/pbpal_adns_sockets.c
        ${CMAKE_CURRENT_LIST_DIR}/lib/sockets/pbpal_resolv_and_connect_sockets.c)
else()
    set(CORE_SOURCEFILES
        ${CORE_SOURCEFILES}
        ${CMAKE_CURRENT_LIST_DIR}/core/pubnub_alloc_static.c)
endif()

if(NOT ${OPENSSL})
    set(LIB_SOURCEFILES
        ${LIB_SOURCEFILES}
        ${CMAKE_CURRENT_LIST_DIR}/lib/md5/md5.c)
endif()

if(UNIX)
    message(STATUS "Using POSIX setup")

    set(LDLIBS "-lpthread ${LDLIBS}")
    set(OS_SOURCEFILES
        ${CMAKE_CURRENT_LIST_DIR}/posix/posix_socket_blocking_io.c
        ${CMAKE_CURRENT_LIST_DIR}/posix/pubnub_version_posix.c
        ${CMAKE_CURRENT_LIST_DIR}/posix/pubnub_generate_uuid_posix.c
        ${CMAKE_CURRENT_LIST_DIR}/posix/msstopwatch_monotonic_clock.c
        ${CMAKE_CURRENT_LIST_DIR}/posix/pbtimespec_elapsed_ms.c
        ${CMAKE_CURRENT_LIST_DIR}/posix/pb_sleep_ms.c)

    if(APPLE)
        set(OS_SOURCEFILES ${OS_SOURCEFILES} ${CMAKE_CURRENT_LIST_DIR}/posix/monotonic_clock_get_time_darwin.c)
    else()
        set(OS_SOURCEFILES ${OS_SOURCEFILES} ${CMAKE_CURRENT_LIST_DIR}/posix/monotonic_clock_get_time_posix.c)
    endif()
elseif(WIN32 OR WIN64 OR MSVC)
    message(STATUS "Using Windows setup")

    set(LDLIBS "ws2_32.lib IPHlpAPI.lib rpcrt4.lib")
    set(OS_SOURCEFILES
        ${CMAKE_CURRENT_LIST_DIR}/windows/windows_socket_blocking_io.c
        ${CMAKE_CURRENT_LIST_DIR}/windows/pbtimespec_elapsed_ms.c
        ${CMAKE_CURRENT_LIST_DIR}/windows/pubnub_version_windows.c
        ${CMAKE_CURRENT_LIST_DIR}/windows/pubnub_generate_uuid_windows.c
        ${CMAKE_CURRENT_LIST_DIR}/windows/pbpal_windows_blocking_io.c
        ${CMAKE_CURRENT_LIST_DIR}/windows/msstopwatch_windows.c
        ${CMAKE_CURRENT_LIST_DIR}/windows/pb_sleep_ms.c
        ${CMAKE_CURRENT_LIST_DIR}/windows/pbauto_heartbeat_init_windows.c)
else()
    message(STATUS "Using FreeRTOS setup")

    set(OS_SOURCEFILES
        ${CMAKE_CURRENT_LIST_DIR}/freertos/pbpal_freertos_blocking_io.c
        ${CMAKE_CURRENT_LIST_DIR}/freertos/pbpal_resolv_and_connect_freertos_tcp.c
        ${CMAKE_CURRENT_LIST_DIR}/freertos/pubnub_assert_freertos.c
        ${CMAKE_CURRENT_LIST_DIR}/freertos/pubnub_generate_uuid_freertos.c
        ${CMAKE_CURRENT_LIST_DIR}/freertos/pubnub_version_freertos.c)
    if(ESP_PLATFORM)
        set(OS_SOURCEFILES ${OS_SOURCEFILES} ${CMAKE_CURRENT_LIST_DIR}/freertos/msstopwatch_esp32.c)
    endif()
endif()

set(INTF_SOURCEFILES)

if(${USE_CALLBACK_API})
    message(STATUS "Using callback API")

    set(CORE_SOURCEFILES
        ${CORE_SOURCEFILES}
        ${CMAKE_CURRENT_LIST_DIR}/core/pubnub_memory_block.c
        ${CMAKE_CURRENT_LIST_DIR}/core/pubnub_dns_servers.c)

    set(INTF_SOURCEFILES
        ${CMAKE_CURRENT_LIST_DIR}/core/pubnub_timer_list.c
        ${CMAKE_CURRENT_LIST_DIR}/lib/pubnub_parse_ipv4_addr.c
        ${CMAKE_CURRENT_LIST_DIR}/lib/pubnub_parse_ipv6_addr.c
        ${CMAKE_CURRENT_LIST_DIR}/lib/sockets/pbpal_ntf_callback_poller_poll.c
        ${CMAKE_CURRENT_LIST_DIR}/core/pbpal_ntf_callback_queue.c
        ${CMAKE_CURRENT_LIST_DIR}/core/pbpal_ntf_callback_handle_timer_list.c
        ${CMAKE_CURRENT_LIST_DIR}/core/pubnub_callback_subscribe_loop.c
        ${CMAKE_CURRENT_LIST_DIR}/core/pbpal_ntf_callback_admin.c
        ${CMAKE_CURRENT_LIST_DIR}/lib/sockets/pbpal_adns_sockets.c
        ${INTF_SOURCEFILES})

    if (UNIX)
        set(INTF_SOURCEFILES
            ${INTF_SOURCEFILES}
            ${CMAKE_CURRENT_LIST_DIR}/posix/pubnub_dns_system_servers.c
            ${CMAKE_CURRENT_LIST_DIR}/posix/pubnub_ntf_callback_posix.c
            ${CMAKE_CURRENT_LIST_DIR}/posix/pubnub_get_native_socket.c)
    elseif(WIN32 OR WIN64 OR MSVC)
        if (${OPENSSL})
            set(INTF_SOURCEFILES
                ${INTF_SOURCEFILES}
                ${CMAKE_CURRENT_LIST_DIR}/openssl/pubnub_ntf_callback_windows.c
                ${CMAKE_CURRENT_LIST_DIR}/openssl/pubnub_dns_system_servers.c
                ${CMAKE_CURRENT_LIST_DIR}/openssl/pubnub_get_native_socket.c)
        else()
            set(INTF_SOURCEFILES
                ${INTF_SOURCEFILES}
                ${CMAKE_CURRENT_LIST_DIR}/windows/pubnub_ntf_callback_windows.c
                ${CMAKE_CURRENT_LIST_DIR}/windows/pubnub_dns_system_servers.c
                ${CMAKE_CURRENT_LIST_DIR}/windows/pubnub_get_native_socket.c)
        endif()
    endif()
else()
    message(STATUS "Using sync API")

    set(INTF_SOURCEFILES
        ${INTF_SOURCEFILES}
        ${CMAKE_CURRENT_LIST_DIR}/core/pubnub_ntf_sync.c
        ${CMAKE_CURRENT_LIST_DIR}/core/pubnub_sync_subscribe_loop.c
        ${CMAKE_CURRENT_LIST_DIR}/core/srand_from_pubnub_time.c)
endif()

set(FEATURE_SOURCEFILES)

if(${USE_PROXY})
    set(FEATURE_SOURCEFILES
        ${FEATURE_SOURCEFILES}
        ${CMAKE_CURRENT_LIST_DIR}/core/pubnub_proxy.c
        ${CMAKE_CURRENT_LIST_DIR}/core/pubnub_proxy_core.c
        ${CMAKE_CURRENT_LIST_DIR}/core/pbhttp_digest.c
        ${CMAKE_CURRENT_LIST_DIR}/core/pbntlm_core.c
        ${CMAKE_CURRENT_LIST_DIR}/core/pbntlm_packer_std.c)
endif()

if(${USE_GZIP_COMPRESSION})
    set(FEATURE_SOURCEFILES
        ${FEATURE_SOURCEFILES}
        ${CMAKE_CURRENT_LIST_DIR}/lib/miniz/miniz_tdef.c
        ${CMAKE_CURRENT_LIST_DIR}/lib/miniz/miniz.c
        ${CMAKE_CURRENT_LIST_DIR}/lib/pbcrc32.c
        ${CMAKE_CURRENT_LIST_DIR}/core/pbgzip_compress.c)
endif()

if(${RECEIVE_GZIP_RESPONSE})
    set(FEATURE_SOURCEFILES
        ${FEATURE_SOURCEFILES}
        ${CMAKE_CURRENT_LIST_DIR}/lib/miniz/miniz_tinfl.c
        ${CMAKE_CURRENT_LIST_DIR}/core/pbgzip_decompress.c)
endif()

if(${USE_SUBSCRIBE_V2})
    set(FEATURE_SOURCEFILES
        ${FEATURE_SOURCEFILES}
        ${CMAKE_CURRENT_LIST_DIR}/core/pbcc_subscribe_v2.c
        ${CMAKE_CURRENT_LIST_DIR}/core/pubnub_subscribe_v2.c)
endif()

if(${USE_ADVANCED_HISTORY})
    set(FEATURE_SOURCEFILES
        ${FEATURE_SOURCEFILES}
        ${CMAKE_CURRENT_LIST_DIR}/core/pbcc_advanced_history.c
        ${CMAKE_CURRENT_LIST_DIR}/core/pubnub_advanced_history.c)
endif()

if(${USE_OBJECTS_API})
    set(FEATURE_SOURCEFILES 
        ${FEATURE_SOURCEFILES} 
        ${CMAKE_CURRENT_LIST_DIR}/core/pbcc_objects_api.c 
        ${CMAKE_CURRENT_LIST_DIR}/core/pubnub_objects_api.c)
endif()

if(${USE_ACTIONS_API})
    set(FEATURE_SOURCEFILES 
        ${FEATURE_SOURCEFILES} 
        ${CMAKE_CURRENT_LIST_DIR}/core/pbcc_actions_api.c 
        ${CMAKE_CURRENT_LIST_DIR}/core/pubnub_actions_api.c)
endif()

if(${USE_AUTO_HEARTBEAT})
    set(FEATURE_SOURCEFILES 
        ${FEATURE_SOURCEFILES} 
        ${CMAKE_CURRENT_LIST_DIR}/core/pbauto_heartbeat.c 
        ${CMAKE_CURRENT_LIST_DIR}/lib/pbstr_remove_from_list.c)
    if(NOT ${OPENSSL})
        if(UNIX)
            set(FEATURE_SOURCEFILES 
                ${FEATURE_SOURCEFILES} 
                ${CMAKE_CURRENT_LIST_DIR}/posix/pbauto_heartbeat_init_posix.c)
        elseif(WIN32 OR WIN64 OR MSVC)
            set(FEATURE_SOURCEFILES 
                ${FEATURE_SOURCEFILES} 
                ${CMAKE_CURRENT_LIST_DIR}/windows/pbauto_heartbeat_init_windows.c)
        endif()
    endif()
endif()

if(${USE_FETCH_HISTORY})
    set(FEATURE_SOURCEFILES 
        ${FEATURE_SOURCEFILES} 
        ${CMAKE_CURRENT_LIST_DIR}/core/pubnub_fetch_history.c 
        ${CMAKE_CURRENT_LIST_DIR}/core/pbcc_fetch_history.c)
endif()

if(${USE_GRANT_TOKEN_API})
    set(FEATURE_SOURCEFILES 
        ${FEATURE_SOURCEFILES} 
        ${CMAKE_CURRENT_LIST_DIR}/core/pbcc_grant_token_api.c 
        ${CMAKE_CURRENT_LIST_DIR}/core/pubnub_grant_token_api.c)
endif()

if(${USE_REVOKE_TOKEN_API})
    set(FEATURE_SOURCEFILES 
        ${FEATURE_SOURCEFILES} 
        ${CMAKE_CURRENT_LIST_DIR}/core/pbcc_revoke_token_api.c 
        ${CMAKE_CURRENT_LIST_DIR}/core/pubnub_revoke_token_api.c)
endif()

set(SSL_LINK_LIBRARIES)
if(${OPENSSL})
    message(STATUS "Using OpenSSL")

    if("${OPENSSL_ROOT_DIR}" STREQUAL "")
        find_package(OpenSSL REQUIRED)
        set(SSL_LINK_LIBRARIES OpenSSL::SSL OpenSSL::Crypto)
    else()
        find_package(OpenSSL PATHS ${OPENSSL_ROOT_DIR})
        if(OpenSSl_FOUND)
            set(SSL_LINK_LIBRARIES OpenSSL::SSL OpenSSL::Crypto)
        else()
            message(STATUS "Searching for custom OpenSSL library")
            if(WIN32 OR WIN64 OR MSVC)
                find_library(OpenSSL REQUIRED NAMES libssl PATHS ${OPENSSL_ROOT_DIR}/${CUSTOM_OPENSSL_LIB_DIR} NO_DEFAULT_PATH)
                find_library(Crypto REQUIRED NAMES libcrypto PATHS ${OPENSSL_ROOT_DIR}/${CUSTOM_OPENSSL_LIB_DIR} NO_DEFAULT_PATH)
            else()
                find_library(OpenSSL REQUIRED NAMES ssl PATHS ${OPENSSL_ROOT_DIR}/${CUSTOM_OPENSSL_LIB_DIR} NO_DEFAULT_PATH)
                find_library(Crypto REQUIRED NAMES crypto PATHS ${OPENSSL_ROOT_DIR}/${CUSTOM_OPENSSL_LIB_DIR} NO_DEFAULT_PATH)
            endif()

            message(STATUS "Used libraries:")
            message(STATUS "-> ${OpenSSL}")
            message(STATUS "-> ${Crypto}")

            set(SSL_LINK_LIBRARIES ${OpenSSL} ${Crypto})
            include_directories(${OPENSSL_ROOT_DIR}/${CUSTOM_OPENSSL_INCLUDE_DIR})

            message(STATUS "Used headers:")
            message(STATUS "-> ${OPENSSL_ROOT_DIR}/${CUSTOM_OPENSSL_INCLUDE_DIR}")

            message(STATUS "OpenSSL ready!")
        endif()
    endif()

    set(FEATURE_SOURCEFILES 
        ${OPENSSL_LIBRARIES} 
        ${FEATURE_SOURCEFILES})

    set(LIB_SOURCEFILES 
        ${CMAKE_CURRENT_LIST_DIR}/lib/base64/pbbase64.c 
        ${LIB_SOURCEFILES})

    set(FEATURE_SOURCEFILES 
        ${CMAKE_CURRENT_LIST_DIR}/openssl/pbpal_openssl.c 
        ${CMAKE_CURRENT_LIST_DIR}/openssl/pbpal_connect_openssl.c 
        ${CMAKE_CURRENT_LIST_DIR}/openssl/pbpal_openssl_blocking_io.c 
        ${CMAKE_CURRENT_LIST_DIR}/core/pbcc_crypto.c 
        ${CMAKE_CURRENT_LIST_DIR}/core/pbcc_crypto_aes_cbc.c 
        ${CMAKE_CURRENT_LIST_DIR}/core/pbcc_crypto_legacy.c 
        ${CMAKE_CURRENT_LIST_DIR}/core/pubnub_crypto.c 
        ${CMAKE_CURRENT_LIST_DIR}/openssl/pbaes256.c 
        ${FEATURE_SOURCEFILES})

    set(FEATURE_SOURCEFILES 
        ${CMAKE_CURRENT_LIST_DIR}/openssl/pbauto_heartbeat_init_posix.c 
        ${FEATURE_SOURCEFILES})

    set(LDLIBS  ${LDLIBS})

    if(UNIX)
        set(FEATURE_SOURCEFILES ${FEATURE_SOURCEFILES} ${CMAKE_CURRENT_LIST_DIR}/openssl/pbpal_add_system_certs_posix.c)
    elseif(WIN32 OR WIN64 OR MSVC)
        set(FEATURE_SOURCEFILES ${FEATURE_SOURCEFILES} ${CMAKE_CURRENT_LIST_DIR}/openssl/pbpal_add_system_certs_windows.c)
    endif()
elseif(${MBEDTLS})
    message(STATUS "Using mbedTLS")

    if(NOT ESP_PLATFORM)
        # TODO: Add mbedTLS support for generic builds
    endif()

    set(SSL_LINK_LIBRARIES 
        ${CMAKE_CURRENT_LIST_DIR}/mbedtls/pbpal_mbedtls.c
        ${CMAKE_CURRENT_LIST_DIR}/mbedtls/pbpal_connect_mbedtls.c)
else()
    set(LIB_SOURCEFILES 
        ${CMAKE_CURRENT_LIST_DIR}/lib/sockets/pbpal_sockets.c 
        ${LIB_SOURCEFILES})
    if(UNIX)
        set(LIB_SOURCEFILES 
            ${CMAKE_CURRENT_LIST_DIR}/posix/pbpal_posix_blocking_io.c 
            ${LIB_SOURCEFILES})
    elseif(WIN32 OR WIN64 OR MSVC)
        set(LIB_SOURCEFILES 
            ${CMAKE_CURRENT_LIST_DIR}/windows/pbpal_windows_blocking_io.c 
            ${LIB_SOURCEFILES})
    endif()
endif()

set(SOURCEFILES 
    ${CORE_SOURCEFILES} 
    ${LIB_SOURCEFILES} 
    ${OS_SOURCEFILES} 
    ${FEATURE_SOURCEFILES} 
    ${INTF_SOURCEFILES})

if(NOT ESP_PLATFORM)
    if(${SHARED_LIB})
        message(STATUS "Building shared library")
        set(LIBTYPE SHARED)
    else()
        message(STATUS "Building static library")
        set(LIBYTPE STATIC)
    endif()

    add_library(pubnub ${LIBTYPE} ${SOURCEFILES})

    target_include_directories(pubnub PUBLIC
        ${CMAKE_CURRENT_LIST_DIR}
        ${CMAKE_CURRENT_LIST_DIR}/core 
        ${CMAKE_CURRENT_LIST_DIR}/lib)
    
    if(${WITH_CPP})
        target_include_directories(pubnub PUBLIC ${CMAKE_CURRENT_LIST_DIR}/cpp)
    endif()
    
    if(${OPENSSL})
        target_include_directories(pubnub PUBLIC 
            ${CMAKE_CURRENT_LIST_DIR}/openssl/
            ${CMAKE_CURRENT_LIST_DIR}/lib/base64)
        target_include_directories(pubnub PUBLIC ${OPENSSL_INCLUDE_DIR})
    elseif(${MBEDTLS})
        target_include_directories(pubnub PUBLIC ${CMAKE_CURRENT_LIST_DIR}/mbedtls)
    else()
        if(UNIX)
            target_include_directories(pubnub PUBLIC ${CMAKE_CURRENT_LIST_DIR}/posix)
        elseif(WIN32 OR WIN64 OR MSVC)
            target_include_directories(pubnub PUBLIC
                ${CMAKE_CURRENT_LIST_DIR}/windows
                ${CMAKE_CURRENT_LIST_DIR}/core/c99)
        else()
            target_include_directories(pubnub PUBLIC ${CMAKE_CURRENT_LIST_DIR}/freertos)
        endif()
    endif()
    
    target_link_libraries(pubnub ${LDLIBS} ${SSL_LINK_LIBRARIES})
else()
    message(STATUS "Building ESP32 IDF component")

    set(EXTRA_CFLAGS ${EXTRA_CFLAGS} ${FLAGS})

    if (${MBEDTLS})
       idf_component_register(SRCS ${SOURCEFILES}
           INCLUDE_DIRS 
               ${CMAKE_CURRENT_LIST_DIR}
               ${CMAKE_CURRENT_LIST_DIR}/core
               ${CMAKE_CURRENT_LIST_DIR}/lib
               ${CMAKE_CURRENT_LIST_DIR}/freertos
               ${CMAKE_CURRENT_LIST_DIR}/mbedtls
               $ENV{IDF_PATH}/components/freertos/FreeRTOS-Kernel/include/freertos
               $ENV{IDF_PATH}/components/mbedtls/mbedtls/include
           REQUIRES 
               freertos
               lwip
               mbedtls)
    else()
        idf_component_register(SRCS ${SOURCEFILES}
            INCLUDE_DIRS 
                ${CMAKE_CURRENT_LIST_DIR}
                ${CMAKE_CURRENT_LIST_DIR}/core
                ${CMAKE_CURRENT_LIST_DIR}/lib
                ${CMAKE_CURRENT_LIST_DIR}/freertos
                $ENV{IDF_PATH}/components/freertos/FreeRTOS-Kernel/include/freertos
            REQUIRES 
                freertos
                lwip)
    endif()


endif()

# TODO: Check if CPP is supported on ESP32
if (WITH_CPP AND NOT ESP_PLATFORM)
    # TODO: Tests
    # fntest/pubnub_fntest_medium.cpp
    # fntest/pubnub_fntest_runner.cpp
    # fntest/pubnub_fntest_basic.cpp
    # fntest/pubnub_fntest.cpp

    set(CPP_SOURCE
        ${CMAKE_CURRENT_LIST_DIR}/cpp/pubnub_subloop.cpp)
        
    if (UNIX)
        set(CPP_SOURCE
            ${CPP_SOURCE}
            ${CMAKE_CURRENT_LIST_DIR}/cpp/pubnub_version_posix.cpp)

        if(${USE_CPP11})
            set(CPP_SOURCE
                ${CPP_SOURCE}
                ${CMAKE_CURRENT_LIST_DIR}/cpp/pubnub_futres_cpp11.cpp)
        else()
                set(CPP_SOURCE
                    ${CPP_SOURCE}
                    ${CMAKE_CURRENT_LIST_DIR}/cpp/pubnub_futres_posix.cpp)
        endif()
    endif()

    if (WIN32 OR WIN64 OR MSVC)
        set(CPP_SOURCE
            ${CPP_SOURCE}
            ${CMAKE_CURRENT_LIST_DIR}/cpp/pubnub_version_windows.cpp)

        if(${USE_CPP11})
            set(CPP_SOURCE
                ${CPP_SOURCE}
                ${CMAKE_CURRENT_LIST_DIR}/cpp/pubnub_futres_cpp11.cpp)
        else()
            set(CPP_SOURCE
                ${CPP_SOURCE}
                ${CMAKE_CURRENT_LIST_DIR}/cpp/pubnub_futres_windows.cpp)
        endif()
    endif()
    
    add_library(pubnub-cpp ${LIBTYPE} ${CPP_SOURCE})
    target_link_libraries(pubnub-cpp PUBLIC pubnub)
    target_include_directories(pubnub-cpp PUBLIC ${CMAKE_CURRENT_LIST_DIR}/cpp)
endif()

if(${EXAMPLES})
    message(STATUS "Building all examples")
    set(EXAMPLE_LIST)
    set(CPP_EXAMPLE_LIST)


    if(${EXAMPLE} STREQUAL "all")
        if (WITH_CPP)
            set(CPP_EXAMPLE_LIST
                pubnub_subloop_sample
                pubnub_sample
                cancel_subscribe_sync_sample
                futres_nesting
                ${CPP_EXAMPLE_LIST})

            if(${OPENSSL} AND ${USE_CPP11})
                    # TODO: Fix this example to be 98 compatible
                    set(CPP_EXAMPLE_LIST 
                        pubnub_crypto_module_sample
                        ${CPP_EXAMPLE_LIST})
                endif()

                if (${USE_GRANT_TOKEN_API})
                    set(CPP_EXAMPLE_LIST
                        pubnub_sample_grant_token
                        ${CPP_EXAMPLE_LIST})
                endif()

                if (${USE_REVOKE_TOKEN_API})
                    set(CPP_EXAMPLE_LIST
                        pubnub_sample_revoke_token
                        ${CPP_EXAMPLE_LIST})
                endif()
        endif()

        if(${USE_CALLBACK_API})
            message(STATUS "Building callback examples")
            set(EXAMPLE_LIST
                pubnub_callback_sample
                pubnub_callback_subloop_sample
                subscribe_publish_callback_sample
                subscribe_publish_from_callback
                publish_callback_subloop_sample
                publish_queue_callback_subloop)
            if (WITH_CPP)
                set(CPP_EXAMPLE_LIST
                    subscribe_publish_callback_sample # Only supports callback!
                    ${CPP_EXAMPLE_LIST})
            endif()
        else()
            message(STATUS "Building sync examples")
            set(EXAMPLE_LIST
                metadata
                pubnub_sync_subloop_sample
                pubnub_sync_publish_retry
                pubnub_publish_via_post_sample
                pubnub_advanced_history_sample
                pubnub_fetch_history_sample
                cancel_subscribe_sync_sample)
            if (OPENSSL)
                set(EXAMPLE_LIST
                    pubnub_crypto_module_sample
                    ${EXAMPLE_LIST})
            endif()
        endif()
    else()
        message(STATUS "Building example ${EXAMPLE}")
        set(EXAMPLE_LIST ${EXAMPLE})
    endif()

    foreach(EXAMPLE ${EXAMPLE_LIST})
        add_executable(${EXAMPLE} ${CMAKE_CURRENT_LIST_DIR}/core/samples/${EXAMPLE}.c)
        target_link_libraries(${EXAMPLE} pubnub ${LDLIBS})
    endforeach()

    foreach(EXAMPLE ${CPP_EXAMPLE_LIST})
        add_executable(${EXAMPLE}-cpp ${CMAKE_CURRENT_LIST_DIR}/cpp/samples/${EXAMPLE}.cpp)
        target_link_libraries(${EXAMPLE}-cpp pubnub-cpp ${LDLIBS})
    endforeach()
endif()

if(${UNIT_TEST})
    message(STATUS "Building unit tests")
    message(STATUS "UNIT TESTS ARE NOT FINISHED YET!")

#    set(CMAKE_C_FLAGS " \
#        ${CMAKE_C_FLAGS} \
#        -D PUBNUB_ADVANCED_KEEP_ALIVE=1 \
#        -D PUBNUB_DYNAMIC_REPLY_BUFFER=1 \
#        -D PUBNUB_ORIGIN_SETTABLE=1")
#
#    add_library(pubnub-unit-test SHARED core/pubnub_core_unit_test.c core/test/pubnub_test_mocks.c ${SOURCEFILES})
#    target_include_directories(pubnub-unit-test PUBLIC 
#        ${CGREEN_ROOT_DIR}/include
#        ${CMAKE_CURRENT_LIST_DIR}/core
#        ${CMAKE_CURRENT_LIST_DIR}/core/test
#        ${CMAKE_CURRENT_LIST_DIR}/lib
#        ${CMAKE_CURRENT_LIST_DIR})
#
#    if(${OPENSSL})
#        target_include_directories(pubnub-unit-test PUBLIC 
#            ${CMAKE_CURRENT_LIST_DIR}/openssl/
#            ${CMAKE_CURRENT_LIST_DIR}/lib/base64)
#        target_include_directories(pubnub-unit-test PUBLIC ${OPENSSL_INCLUDE_DIR})
#    else()
#        if(UNIX)
#            target_include_directories(pubnub-unit-test PUBLIC ${CMAKE_CURRENT_LIST_DIR}/posix)
#        elseif(WIN32 OR WIN64 OR MSVC)
#            target_include_directories(pubnub-unit-test PUBLIC
#                ${CMAKE_CURRENT_LIST_DIR}/windows
#                ${CMAKE_CURRENT_LIST_DIR}/core/c99)
#        endif()
#    endif()
#
#    target_link_libraries(pubnub-unit-test ${LDLIBS} pubnub ${CGREEN_ROOT_DIR}/build/src/libcgreen.a)
#
#    add_custom_target(RunUnitTests
#        COMMAND ${CGREEN_ROOT_DIR/build/tools/cgreen-runner} pubnub-unit-test)

    # TODO: finish unit tests
endif()