cmake_minimum_required(VERSION 3.0)
project(libmodbus VERSION 3.1.6)

set(LIBMODBUS_VERSION ${PROJECT_VERSION})
set(LIBMODBUS_VERSION_MAJOR ${PROJECT_VERSION_MAJOR})
set(LIBMODBUS_VERSION_MINOR ${PROJECT_VERSION_MINOR})
set(LIBMODBUS_VERSION_MICRO ${PROJECT_VERSION_PATCH})
configure_file(src/modbus-version.h.in ${CMAKE_CURRENT_BINARY_DIR}/modbus-version.h)

if(WIN32)
  set(HAVE_ERRNO_H 1)
  set(HAVE_FCNTL_H 1)
  set(HAVE_LIMITS_H 1)
  set(HAVE_SYS_TYPES_H 1)
  set(HAVE_TIME_H 1)
  set(HAVE_MALLOC 1)
  set(HAVE_MEMSET 1)
  set(HAVE_STRERROR 1)
else()
  include(CheckIncludeFile)
  check_include_file(arpa/inet.h HAVE_ARPA_INET_H)
  check_include_file(byteswap.h HAVE_BYTESWAP_H)
  check_include_file(errno.h HAVE_ERRNO_H)
  check_include_file(fcntl.h HAVE_FCNTL_H)
  check_include_file(limits.h HAVE_LIMITS_H)
  check_include_file(linux/serial.h HAVE_LINUX_SERIAL_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/ioctl.h HAVE_SYS_IOCTL_H)
  check_include_file(sys/params.h HAVE_SYS_PARAMS_H)
  check_include_file(sys/socket.h HAVE_SYS_SOCKET_H)
  check_include_file(sys/time.h HAVE_SYS_TIME_H)
  check_include_file(sys/types.h HAVE_SYS_TYPES_H)
  check_include_file(termios.h HAVE_TERMIOS_H)
  check_include_file(time.h HAVE_TIME_H)
  check_include_file(unistd.h HAVE_UNISTD_H)

  include(CheckFunctionExists)
  check_function_exists(accept4 HAVE_ACCEPT4)
  check_function_exists(fork HAVE_FORK)
  check_function_exists(getaddrinfo HAVE_GETADDRINFO)
  check_function_exists(gettimeofday HAVE_GETTIMEOFDAY)
  check_function_exists(inet_ntoa HAVE_INET_NTOA)
  check_function_exists(malloc HAVE_MALLOC)
  check_function_exists(memset HAVE_MEMSET)
  check_function_exists(select HAVE_SELECT)
  check_function_exists(socket HAVE_SOCKET)
  check_function_exists(strerror HAVE_STRERROR)
  check_function_exists(strlcpy HAVE_STRLCPY)

  include(CheckSymbolExists)
  check_symbol_exists(TIOCSRS485 sys/ioctl.h HAVE_TIOCRS485)
  check_symbol_exists(TIOCM_RTS sys/ioctl.h HAVE_TIOCM_RTS)
endif()

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


if(BUILD_SHARED_LIBS)
  add_compile_options(-DDLLBUILD=ON)
else()
  add_compile_options(-DLIBBUILD=ON)
endif()

set(MODBUS_PUBLIC_HEADERS
  src/modbus-rtu.h
  src/modbus-tcp.h
  src/modbus.h
  ${CMAKE_CURRENT_BINARY_DIR}/modbus-version.h
)

add_library(modbus
  src/modbus-data.c
  src/modbus-rtu.c
  src/modbus-tcp.c
src/modbus.c)

target_include_directories(modbus PRIVATE ${CMAKE_CURRENT_BINARY_DIR})
target_include_directories(modbus INTERFACE
  $<INSTALL_INTERFACE:include>
)
set_target_properties(modbus PROPERTIES PUBLIC_HEADER "${MODBUS_PUBLIC_HEADERS}")

if(CMAKE_COMPILER_IS_GNUCC)
  target_compile_options(modbus PRIVATE -D_GNU_SOURCE)
endif()

if(WIN32)
  target_link_libraries(modbus  wsock32 ws2_32)
endif()

set(LIBMODBUS_SOVERSION_VERSION 5.1.0)
set(LIBMODBUS_SOVERSION_SOVERSION 5)


set_target_properties(modbus PROPERTIES
  VERSION ${LIBMODBUS_SOVERSION_VERSION}
SOVERSION ${LIBMODBUS_SOVERSION_SOVERSION})


install(
  TARGETS modbus
  EXPORT libmodbusConfig
  RUNTIME DESTINATION bin
  LIBRARY DESTINATION lib
  ARCHIVE DESTINATION lib
)
install(EXPORT libmodbusConfig DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake)


if(NOT DISABLE_INSTALL_HEADERS)
  install(FILES ${MODBUS_PUBLIC_HEADERS} DESTINATION include/)
endif()