CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
PROJECT(tsctp LANGUAGES C)

SET(BUILD_MAJOR "0")
SET(BUILD_MINOR "8")
SET(BUILD_PATCH "1")
SET(BUILD_VERSION ${BUILD_MAJOR}.${BUILD_MINOR}.${BUILD_PATCH})


#############################################################################
#### INSTALLATION_DIRECTORIES                                            ####
#############################################################################

# See: https://cmake.org/cmake/help/v3.0/module/GNUInstallDirs.html
INCLUDE(GNUInstallDirs)


#############################################################################
#### PACKAGING                                                           ####
#############################################################################

SET(CPACK_SOURCE_GENERATOR "TXZ")
SET(CPACK_SOURCE_PACKAGE_FILE_NAME
    "${CMAKE_PROJECT_NAME}-${BUILD_MAJOR}.${BUILD_MINOR}.${BUILD_PATCH}")
SET(CPACK_SOURCE_IGNORE_FILES "\\\\.git;\\\\.swp$;~$;\\\\.\\\\#;/\\\\#")
LIST(APPEND CPACK_SOURCE_IGNORE_FILES "^${PROJECT_SOURCE_DIR}/${CMAKE_PROJECT_NAME}[_-]")
LIST(APPEND CPACK_SOURCE_IGNORE_FILES "\\\\.cmake$|\\\\.make$|\\\\.log$")
LIST(APPEND CPACK_SOURCE_IGNORE_FILES "/CMakeCache\\\\.txt$")
LIST(APPEND CPACK_SOURCE_IGNORE_FILES "/(CMakeFiles|CMakeScripts|_CPack_Packages)/")
LIST(APPEND CPACK_SOURCE_IGNORE_FILES "/package-version\\\\.h$")
LIST(APPEND CPACK_SOURCE_IGNORE_FILES "/packaging\\\\.conf$")
LIST(APPEND CPACK_SOURCE_IGNORE_FILES "^${PROJECT_SOURCE_DIR}/(po.*/|src.*/|)Makefile$")
INCLUDE(CPack)

ADD_CUSTOM_TARGET(dist COMMAND ${CMAKE_MAKE_PROGRAM} clean package_source)


INCLUDE(CheckIncludeFile)
INCLUDE(CheckStructHasMember)


#############################################################################
#### UNINSTALL                                                           ####
#############################################################################

IF(NOT TARGET uninstall)
   CONFIGURE_FILE(
      "${CMAKE_CURRENT_SOURCE_DIR}/cmake_uninstall.cmake.in"
      "${CMAKE_CURRENT_BINARY_DIR}/cmake_uninstall.cmake"
      IMMEDIATE @ONLY)

   ADD_CUSTOM_TARGET(uninstall
      COMMAND ${CMAKE_COMMAND} -P ${CMAKE_CURRENT_BINARY_DIR}/cmake_uninstall.cmake)
ENDIF()


#############################################################################
#### OS DEPENDENT                                                        ####
#############################################################################

IF (${CMAKE_SYSTEM_NAME} MATCHES "Linux")
    MESSAGE(STATUS ${CMAKE_SYSTEM_NAME} " supported")
    FIND_LIBRARY(SCTP_LIB sctp)

ELSEIF (${CMAKE_SYSTEM_NAME} MATCHES "FreeBSD")
    MESSAGE(STATUS ${CMAKE_SYSTEM_NAME} " supported")
    SET(CMAKE_REQUIRED_INCLUDES "/usr/local/include" "/usr/include")
    SET(CMAKE_LIBRARY_PATH "/usr/local/lib")
    INCLUDE_DIRECTORIES("/usr/local/include")

ELSEIF (${CMAKE_SYSTEM_NAME} MATCHES "Darwin")
    MESSAGE(STATUS ${CMAKE_SYSTEM_NAME} " supported")
    SET(CMAKE_REQUIRED_INCLUDES "/usr/local/include" "/usr/include" "/usr/local/opt/openssl/include")
    SET(CMAKE_LIBRARY_PATH "/usr/local/lib")
    INCLUDE_DIRECTORIES("/usr/local/include" "/usr/local/opt/openssl/include")

ELSEIF (${CMAKE_SYSTEM_NAME} MATCHES "NetBSD")
    MESSAGE(STATUS ${CMAKE_SYSTEM_NAME} " supported")
    SET(CMAKE_REQUIRED_INCLUDES "/usr/pkg/include" "/usr/include" "/usr/local/include")
    SET(CMAKE_LIBRARY_PATH "/usr/local/lib")
    INCLUDE_DIRECTORIES("/usr/pkg/include" "/usr/local/include")

ELSE()
    MESSAGE(FATAL_ERROR ${CMAKE_SYSTEM_NAME} " not supported (yet?)")

ENDIF()


#############################################################################
#### CHECK STRUCT MEMBERS                                                ####
#############################################################################

CHECK_STRUCT_HAS_MEMBER("struct sockaddr" "sa_len" "sys/types.h;sys/socket.h" HAVE_SA_LEN)
IF (HAVE_SA_LEN)
    MESSAGE(STATUS "HAVE_SA_LEN")
    ADD_DEFINITIONS(-DHAVE_SA_LEN)
ENDIF()

CHECK_STRUCT_HAS_MEMBER("struct sockaddr_in" "sin_len" "sys/types.h;netinet/in.h" HAVE_SIN_LEN)
IF (HAVE_SIN_LEN)
    MESSAGE(STATUS "HAVE_SIN_LEN")
    ADD_DEFINITIONS(-DHAVE_SIN_LEN)
ENDIF()

CHECK_STRUCT_HAS_MEMBER("struct sockaddr_in6" "sin6_len" "sys/types.h;netinet/in.h" HAVE_SIN6_LEN)
IF (HAVE_SIN6_LEN)
    MESSAGE(STATUS "HAVE_SIN6_LEN")
    ADD_DEFINITIONS(-DHAVE_SIN6_LEN)
ENDIF()

CHECK_STRUCT_HAS_MEMBER("struct sockaddr_storage" "ss_len" "sys/types.h;sys/socket.h" HAVE_SS_LEN)
IF (HAVE_SS_LEN)
    MESSAGE(STATUS "HAVE_SS_LEN")
    ADD_DEFINITIONS(-DHAVE_SS_LEN)
ENDIF()


#############################################################################
#### REQUIREMENTS                                                        ####
#############################################################################

# ====== Threads ============================================================
FIND_PACKAGE(Threads REQUIRED)

# ====== Kernel SCTP ========================================================
CHECK_INCLUDE_FILE(netinet/sctp.h HAVE_NETINET_SCTP_H)
IF (HAVE_NETINET_SCTP_H)
   SET(SCTP_INCLUDE "netinet/sctp.h")
   ADD_DEFINITIONS(-DHAVE_KERNEL_SCTP -DHAVE_NETINET_SCTP_H)
   IF (${CMAKE_SYSTEM_NAME} MATCHES "Linux")
      FIND_LIBRARY(SCTP_LIB sctp REQUIRED)
   ELSE()
      FIND_LIBRARY(SCTP_LIB sctp)
   ENDIF()
   IF (SCTP_LIB)
      SET(CMAKE_REQUIRED_LIBRARIES ${CMAKE_REQUIRED_LIBRARIES} ${SCTP_LIB})
   ELSE()
      SET(SCTP_LIB "")
   ENDIF()
ENDIF()


#############################################################################
#### SUBDIRECTORIES                                                      ####
#############################################################################

ADD_SUBDIRECTORY(src)
