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# CMake Module to handle all the systemd-related checks for Netdata.
#
# Copyright (c) 2024 Netdata Inc.
# SPDX-License-Identifier: GPL-3.0-or-later
macro(detect_systemd)
find_library(SYSTEMD_LIBRARY NAMES systemd)
set(ENABLE_DSYSTEMD_DBUS NO)
pkg_check_modules(SYSTEMD libsystemd)
if(SYSTEMD_FOUND)
set(CMAKE_REQUIRED_LIBRARIES_BEFORE_SYSTEMD "${CMAKE_REQUIRED_LIBRARIES}")
set(CMAKE_REQUIRED_LIBRARIES "${CMAKE_REQUIRED_LIBRARIES};${SYSTEMD_LIBRARIES}")
check_c_source_compiles("
#include <systemd/sd-journal.h>
int main() {
int x = SD_JOURNAL_OS_ROOT;
return 0;
}" HAVE_SD_JOURNAL_OS_ROOT)
check_symbol_exists(SD_JOURNAL_OS_ROOT "systemd/sd-journal.h" HAVE_SD_JOURNAL_OS_ROOT)
check_symbol_exists(sd_journal_open_files_fd "systemd/sd-journal.h" HAVE_SD_JOURNAL_OPEN_FILES_FD)
check_symbol_exists(sd_journal_restart_fields "systemd/sd-journal.h" HAVE_SD_JOURNAL_RESTART_FIELDS)
check_symbol_exists(sd_journal_get_seqnum "systemd/sd-journal.h" HAVE_SD_JOURNAL_GET_SEQNUM)
check_symbol_exists(sd_bus_default_system "systemd/sd-bus.h" HAVE_SD_BUS_DEFAULT_SYSTEM)
check_symbol_exists(sd_bus_call_method "systemd/sd-bus.h" HAVE_SD_BUS_CALL_METHOD)
check_symbol_exists(sd_bus_message_enter_container "systemd/sd-bus.h" HAVE_SD_BUS_MESSAGE_ENTER_CONTAINER)
check_symbol_exists(sd_bus_message_read "systemd/sd-bus.h" HAVE_SD_BUS_MESSAGE_READ)
check_symbol_exists(sd_bus_message_exit_container "systemd/sd-bus.h" HAVE_SD_BUS_MESSAGE_EXIT_CONTAINER)
set(CMAKE_REQUIRED_LIBRARIES "${CMAKE_REQUIRED_LIBRARIES_BEFORE_SYSTEMD}")
set(HAVE_SYSTEMD True)
if(HAVE_SD_BUS_DEFAULT_SYSTEM AND HAVE_SD_BUS_CALL_METHOD AND HAVE_SD_BUS_MESSAGE_ENTER_CONTAINER AND HAVE_SD_BUS_MESSAGE_READ AND HAVE_SD_BUS_MESSAGE_EXIT_CONTAINER)
set(ENABLE_SYSTEMD_DBUS YES)
endif()
endif()
endmacro()
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