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Network/libpcap-1.9.0/CMakeLists.txt 78.6 KB
fee2cbd6   amoreau   ajout des librairies
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  cmake_minimum_required(VERSION 2.8.6)
  
  #
  # Apple doesn't build with an install_name starting with @rpath, and
  # neither do we with autotools; don't do so with CMake, either, and
  # suppress warnings about that.
  #
  if(POLICY CMP0042)
      cmake_policy(SET CMP0042 OLD)
  endif()
  
  set(CMAKE_MODULE_PATH ${CMAKE_SOURCE_DIR}/cmake/Modules)
  
  project(pcap)
  
  #
  # Try to enable as many C99 features as we can.
  # At minimum, we want C++/C99-style // comments.
  #
  # Newer versions of compilers might default to supporting C99, but older
  # versions may require a special flag.
  #
  # Prior to CMake 3.1, setting CMAKE_C_STANDARD will not have any effect,
  # so, unless and until we require CMake 3.1 or later, we have to do it
  # ourselves on pre-3.1 CMake, so we just do it ourselves on all versions
  # of CMake.
  #
  # Note: with CMake 3.1 through 3.5, the only compilers for which CMake
  # handles CMAKE_C_STANDARD are GCC and Clang.  3.6 adds support only
  # for Intel C; 3.9 adds support for PGI C, Sun C, and IBM XL C, and
  # 3.10 adds support for Cray C and IAR C, but no version of CMake has
  # support for HP C.  Therefore, even if we use CMAKE_C_STANDARD with
  # compilers for which CMake supports it, we may still have to do it
  # ourselves on other compilers.
  #
  # See the CMake documentation for the CMAKE_<LANG>_COMPILER_ID variables
  # for a list of compiler IDs.
  #
  # We don't worry about MSVC; it doesn't have such a flag - either it
  # doesn't support the C99 features we need at all, or it supports them
  # regardless of the compiler flag.
  #
  # XXX - this just tests whether the option works and adds it if it does.
  # We don't test whether it's necessary in order to get the C99 features
  # that we use; if we ever have a user who tries to compile with a compiler
  # that can't be made to support those features, we can add a test to make
  # sure we actually *have* C99 support.
  #
  include(CheckCCompilerFlag)
  macro(check_and_add_compiler_option _option)
      message(STATUS "Checking C compiler flag ${_option}")
      string(REPLACE "=" "-" _temp_option_variable ${_option})
      string(REGEX REPLACE "^-" "" _option_variable ${_temp_option_variable})
      check_c_compiler_flag("${_option}" ${_option_variable})
      if(${${_option_variable}})
          set(C_ADDITIONAL_FLAGS "${C_ADDITIONAL_FLAGS} ${_option}")
      endif()
  endmacro()
  
  set(C_ADDITIONAL_FLAGS "")
  if(CMAKE_C_COMPILER_ID MATCHES "GNU" OR
     CMAKE_C_COMPILER_ID MATCHES "Clang")
      check_and_add_compiler_option("-std=gnu99")
  elseif(CMAKE_C_COMPILER_ID MATCHES "XL")
      #
      # We want support for extensions picked up for GNU C compatibility,
      # so we use -qlanglvl=extc99.
      #
      check_and_add_compiler_option("-qlanglvl=extc99")
  elseif(CMAKE_C_COMPILER_ID MATCHES "HP")
      check_and_add_compiler_option("-AC99")
  elseif(CMAKE_C_COMPILER_ID MATCHES "Sun")
      check_and_add_compiler_option("-xc99")
  elseif(CMAKE_C_COMPILER_ID MATCHES "Intel")
      check_and_add_compiler_option("-c99")
  endif()
  
  #
  # Build all runtimes in the top-level binary directory; that way,
  # on Windows, the executables will be in the same directory as
  # the DLLs, so the system will find pcap.dll when any of the
  # executables are run.
  #
  set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/run)
  
  ###################################################################
  #   Parameters
  ###################################################################
  
  if(WIN32)
      #
      # On Windows, allow the library name to be overridden, for the
      # benefit of projects that combine libpcap with their own
      # kernel-mode code to support capturing.
      #
      set(LIBRARY_NAME pcap CACHE STRING "Library name")
  else()
      #
      # On UN*X, it's always been libpcap.
      #
      set(LIBRARY_NAME pcap)
  endif()
  
  option(INET6 "Enable IPv6" ON)
  if(WIN32)
      option(USE_STATIC_RT "Use static Runtime" ON)
  endif(WIN32)
  option(BUILD_SHARED_LIBS "Build shared libraries" ON)
  if(WIN32)
      set(PACKET_DLL_DIR "" CACHE PATH "Path to directory with include and lib subdirectories for packet.dll")
  endif(WIN32)
  
  # To pacify those who hate the protochain instruction
  option(NO_PROTOCHAIN "Disable protochain instruction" OFF)
  
  #
  # Start out with the capture mechanism type unspecified; the user
  # can explicitly specify it and, if they don't, we'll pick an
  # appropriate one.
  #
  set(PCAP_TYPE "" CACHE STRING "Packet capture type")
  
  #
  # Default to having remote capture support on Windows and, for now, to
  # not having it on UN*X.
  #
  if(WIN32)
      option(ENABLE_REMOTE "Enable remote capture" ON)
  else()
      option(ENABLE_REMOTE "Enable remote capture" OFF)
  endif(WIN32)
  
  if(CMAKE_SYSTEM_NAME STREQUAL "Linux")
      option(PCAP_SUPPORT_PACKET_RING "Enable Linux packet ring support" ON)
      option(BUILD_WITH_LIBNL "Build with libnl" ON)
  endif()
  
  #
  # By default, build universal with the appropriate set of architectures
  # for the OS on which we're doing the build.
  #
  if(APPLE AND "${CMAKE_OSX_ARCHITECTURES}" STREQUAL "")
      #
      # Get the major version of Darwin.
      #
      string(REGEX MATCH "^([0-9]+)" SYSTEM_VERSION_MAJOR "${CMAKE_SYSTEM_VERSION}")
  
      if(SYSTEM_VERSION_MAJOR LESS 8)
          #
          # Pre-Tiger.  Build only for 32-bit PowerPC.
          #
          set(CMAKE_OSX_ARCHITECTURES "ppc")
      elseif(SYSTEM_VERSION_MAJOR EQUAL 8)
          #
          # Tiger.  Is this prior to, or with, Intel support?
          #
          # Get the minor version of Darwin.
          #
          string(REPLACE "${SYSTEM_VERSION_MAJOR}." "" SYSTEM_MINOR_AND_PATCH_VERSION ${CMAKE_SYSTEM_VERSION})
          string(REGEX MATCH "^([0-9]+)" SYSTEM_VERSION_MINOR "${SYSTEM_MINOR_AND_PATCH_VERSION}")
          if(SYSTEM_VERSION_MINOR LESS 4)
              #
              # Prior to Intel support.  Build for 32-bit
              # PowerPC and 64-bit PowerPC, with 32-bit PowerPC
              # first.  (I'm guessing that's what Apple does.)
              #
              set(CMAKE_OSX_ARCHITECTURES "ppc;ppc64")
          elseif(SYSTEM_VERSION_MINOR LESS 7)
              #
              # With Intel support but prior to x86-64 support.
              # Build for 32-bit PowerPC, 64-bit PowerPC, and x86,
              # with 32-bit PowerPC first.
              # (I'm guessing that's what Apple does.)
              #
              set(CMAKE_OSX_ARCHITECTURES "ppc;ppc64;i386")
          else()
              #
              # With Intel support including x86-64 support.
              # Build for 32-bit PowerPC, 64-bit PowerPC, x86,
              # and x86-64, with 32-bit PowerPC first.
              # (I'm guessing that's what Apple does.)
              #
              set(CMAKE_OSX_ARCHITECTURES "ppc;ppc64;i386;x86_64")
          endif()
      elseif(SYSTEM_VERSION_MAJOR EQUAL 9)
          #
          # Leopard.  Build for 32-bit PowerPC, 64-bit
          # PowerPC, x86, and x86-64, with 32-bit PowerPC
          # first.  (That's what Apple does.)
          #
          set(CMAKE_OSX_ARCHITECTURES "ppc;ppc64;i386;x86_64")
      elseif(SYSTEM_VERSION_MAJOR EQUAL 10)
          #
          # Snow Leopard.  Build for x86-64, x86, and
          # 32-bit PowerPC, with x86-64 first.  (That's
          # what Apple does, even though Snow Leopard
          # doesn't run on PPC, so PPC libpcap runs under
          # Rosetta, and Rosetta doesn't support BPF
          # ioctls, so PPC programs can't do live
          # captures.)
          #
          set(CMAKE_OSX_ARCHITECTURES "x86_64;i386;ppc")
      else()
          #
          # Post-Snow Leopard.  Build for x86-64 and
          # x86, with x86-64 first.  (That's probably what
          # Apple does, given that Rosetta is gone.)
          # XXX - update if and when Apple drops support
          # for 32-bit x86 code.
          #
          set(CMAKE_OSX_ARCHITECTURES "x86_64;i386")
      endif()
  endif()
  
  #
  # Additional capture modules.
  #
  option(DISABLE_USB "Disable USB sniffing support" OFF)
  option(DISABLE_BLUETOOTH "Disable Bluetooth sniffing support" OFF)
  option(DISABLE_NETMAP "Disable netmap support" OFF)
  #
  # We don't support D-Bus sniffing on macOS; see
  #
  # https://bugs.freedesktop.org/show_bug.cgi?id=74029
  #
  if(APPLE)
      option(DISABLE_DBUS "Disable D-Bus sniffing support" ON)
  else(APPLE)
      option(DISABLE_DBUS "Disable D-Bus sniffing support" OFF)
  endif(APPLE)
  option(DISABLE_RDMA "Disable RDMA sniffing support" OFF)
  
  option(DISABLE_DAG "Disable Endace DAG card support" OFF)
  
  option(DISABLE_SEPTEL "Disable Septel card support" OFF)
  set(SEPTEL_ROOT "${CMAKE_SOURCE_DIR}/../septel" CACHE PATH "Path to directory with include and lib subdirectories for Septel API")
  
  option(DISABLE_SNF "Disable Myricom SNF support" OFF)
  
  option(DISABLE_TC "Disable Riverbed TurboCap support" OFF)
  
  #
  # Debugging options.
  #
  option(BDEBUG "Build optimizer debugging code" OFF)
  option(YYDEBUG "Build parser debugging code" OFF)
  
  ###################################################################
  #   Versioning
  ###################################################################
  
  # Get, parse, format and set pcap's version string from [pcap_root]/VERSION
  # for later use.
  
  # Get MAJOR, MINOR, PATCH & SUFFIX
  file(STRINGS ${pcap_SOURCE_DIR}/VERSION
      PACKAGE_VERSION
      LIMIT_COUNT 1 # Read only the first line
  )
  
  # Get "just" MAJOR
  string(REGEX MATCH "^([0-9]+)" PACKAGE_VERSION_MAJOR "${PACKAGE_VERSION}")
  
  # Get MAJOR, MINOR & PATCH
  string(REGEX MATCH "^([0-9]+.)?([0-9]+.)?([0-9]+)" PACKAGE_VERSION_NOSUFFIX "${PACKAGE_VERSION}")
  
  if(WIN32)
      # Convert PCAP_VERSION_NOSUFFIX to Windows preferred version format
      string(REPLACE "." "," PACKAGE_VERSION_PREDLL ${PACKAGE_VERSION_NOSUFFIX})
  
      # Append NANO (used for Windows internal versioning) to PCAP_VERSION_PREDLL
      # 0 means unused.
      set(PACKAGE_VERSION_DLL ${PACKAGE_VERSION_PREDLL},0)
  endif(WIN32)
  
  set(PACKAGE_NAME "${LIBRARY_NAME}")
  set(PACKAGE_STRING "${LIBRARY_NAME} ${PACKAGE_VERSION}")
  
  ######################################
  # Project settings
  ######################################
  
  add_definitions(-DHAVE_CONFIG_H)
  
  include_directories(
      ${CMAKE_CURRENT_BINARY_DIR}
      ${pcap_SOURCE_DIR}
  )
  
  include(CheckFunctionExists)
  include(CMakePushCheckState)
  
  if(WIN32)
  
      if(IS_DIRECTORY ${CMAKE_HOME_DIRECTORY}/../../Common)
          include_directories(${CMAKE_HOME_DIRECTORY}/../../Common)
      endif(IS_DIRECTORY ${CMAKE_HOME_DIRECTORY}/../../Common)
  
      find_package(Packet)
      if(PACKET_FOUND)
          set(HAVE_PACKET32 TRUE)
          include_directories(${PACKET_INCLUDE_DIRS})
          #
          # Check whether we have the NPcap PacketIsLoopbackAdapter()
          # function.
          #
          cmake_push_check_state()
          set(CMAKE_REQUIRED_LIBRARIES ${PACKET_LIBRARIES})
          check_function_exists(PacketIsLoopbackAdapter HAVE_PACKET_IS_LOOPBACK_ADAPTER)
          cmake_pop_check_state()
      endif(PACKET_FOUND)
  
  endif(WIN32)
  
  if(MSVC)
      add_definitions(-D__STDC__)
      add_definitions(-D_CRT_SECURE_NO_WARNINGS)
  endif(MSVC)
  
  if(USE_STATIC_RT)
      message(STATUS "Use STATIC runtime")
          if(MSVC)
              foreach(RT_FLAG
                  CMAKE_C_FLAGS CMAKE_C_FLAGS_DEBUG CMAKE_C_FLAGS_RELEASE
                  CMAKE_C_FLAGS_MINSIZEREL CMAKE_C_FLAGS_RELWITHDEBINFO
                  CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_DEBUG CMAKE_CXX_FLAGS_RELEASE
                  CMAKE_CXX_FLAGS_MINSIZEREL CMAKE_CXX_FLAGS_RELWITHDEBINFO)
                  string(REGEX REPLACE "/MD" "/MT" ${RT_FLAG} "${${RT_FLAG}}")
              endforeach(RT_FLAG)
          elseif(MINGW)
              set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -static-libgcc")
          endif()
  else (USE_STATIC_RT)
      message(STATUS "Use DYNAMIC runtime")
  endif(USE_STATIC_RT)
  
  ###################################################################
  #   Detect available platform features
  ###################################################################
  
  include(CheckIncludeFile)
  include(CheckIncludeFiles)
  include(CheckStructHasMember)
  include(CheckTypeSize)
  
  #
  # Header files.
  #
  check_include_file(inttypes.h HAVE_INTTYPES_H)
  check_include_file(stdint.h HAVE_STDINT_H)
  check_include_file(unistd.h HAVE_UNISTD_H)
  if(NOT HAVE_UNISTD_H)
      add_definitions(-DYY_NO_UNISTD_H)
  endif(NOT HAVE_UNISTD_H)
  check_include_file(bitypes.h HAVE_SYS_BITYPES_H)
  if(NOT WIN32)
      check_include_file(sys/ioccom.h HAVE_SYS_IOCCOM_H)
      check_include_file(sys/sockio.h HAVE_SYS_SOCKIO_H)
      check_include_file(sys/select.h HAVE_SYS_SELECT_H)
  endif(NOT WIN32)
  check_include_file(limits.h HAVE_LIMITS_H)
  if(NOT WIN32)
      check_include_file(netpacket/packet.h HAVE_NETPACKET_PACKET_H)
      check_include_files("sys/types.h;sys/socket.h;net/if.h;net/pfvar.h" HAVE_NET_PFVAR_H)
      if(HAVE_NET_PFVAR_H)
          #
          # Check for various PF actions.
          #
          check_c_source_compiles(
  "#include <sys/types.h>
  #include <sys/socket.h>
  #include <net/if.h>
  #include <net/pfvar.h>
  
  int
  main(void)
  {
      return PF_NAT+PF_NONAT+PF_BINAT+PF_NOBINAT+PF_RDR+PF_NORDR;
  }
  "
              HAVE_PF_NAT_THROUGH_PF_NORDR)
      endif(HAVE_NET_PFVAR_H)
      check_include_file(netinet/if_ether.h HAVE_NETINET_IF_ETHER_H)
      if(CMAKE_SYSTEM_NAME STREQUAL "Linux")
          check_include_file(linux/sockios.h HAVE_LINUX_SOCKIOS_H)
          #
          # linux/if_bonding.h requires sys/socket.h.
          #
          check_include_files("sys/socket.h;linux/if_bonding.h" HAVE_LINUX_IF_BONDING_H)
      endif()
  endif(NOT WIN32)
  
  #
  # Functions.
  #
  check_function_exists(strerror HAVE_STRERROR)
  check_function_exists(strerror_r HAVE_STRERROR_R)
  check_function_exists(strerror_s HAVE_STRERROR_S)
  check_function_exists(strlcpy HAVE_STRLCPY)
  check_function_exists(strlcat HAVE_STRLCAT)
  check_function_exists(snprintf HAVE_SNPRINTF)
  check_function_exists(vsnprintf HAVE_VSNPRINTF)
  check_function_exists(strtok_r HAVE_STRTOK_R)
  
  #
  # These tests are for network applications that need socket functions
  # and getaddrinfo()/getnameinfo()-ish functions.  We now require
  # getaddrinfo() and getnameinfo().  On UN*X systems, we also prefer
  # versions of recvmsg() that conform to the Single UNIX Specification,
  # so that we can check whether a datagram received with recvmsg() was
  # truncated when received due to the buffer being too small.
  #
  # On Windows, getaddrinfo() is in the ws2_32 library.
  
  # On most UN*X systems, they're available in the system library.
  #
  # Under Solaris, we need to link with libsocket and libnsl to get
  # getaddrinfo() and getnameinfo() and, if we have libxnet, we need to
  # link with libxnet before libsocket to get a version of recvmsg()
  # that conforms to the Single UNIX Specification.
  #
  # We use getaddrinfo() because we want a portable thread-safe way
  # of getting information for a host name or port; there exist _r
  # versions of gethostbyname() and getservbyname() on some platforms,
  # but not on all platforms.
  #
  # NOTE: if you hand check_library_exists as its last argument a variable
  # that's been set, it skips the test, so we need different variables.
  #
  set(PCAP_LINK_LIBRARIES "")
  include(CheckLibraryExists)
  include(CheckSymbolExists)
  if(WIN32)
      #
      # We need winsock2.h and ws2tcpip.h.
      #
      cmake_push_check_state()
      set(CMAKE_REQUIRED_LIBRARIES ws2_32)
      check_symbol_exists(getaddrinfo "winsock2.h;ws2tcpip.h" LIBWS2_32_HAS_GETADDRINFO)
      cmake_pop_check_state()
      if(LIBWS2_32_HAS_GETADDRINFO)
          set(PCAP_LINK_LIBRARIES ws2_32 ${PCAP_LINK_LIBRARIES})
      else(LIBWS2_32_HAS_GETADDRINFO)
          message(FATAL_ERROR "getaddrinfo is required, but wasn't found")
      endif(LIBWS2_32_HAS_GETADDRINFO)
  else(WIN32)
      #
      # UN*X.  First try the system libraries, then try the libraries
      # for Solaris and possibly other systems that picked up the
      # System V library split.
      #
      check_function_exists(getaddrinfo STDLIBS_HAVE_GETADDRINFO)
      if(NOT STDLIBS_HAVE_GETADDRINFO)
          #
          # Not found in the standard system libraries.
          # Try libsocket, which requires libnsl.
          #
          cmake_push_check_state()
          set(CMAKE_REQUIRED_LIBRARIES nsl)
          check_library_exists(socket getaddrinfo "" LIBSOCKET_HAS_GETADDRINFO)
          cmake_pop_check_state()
          if(LIBSOCKET_HAS_GETADDRINFO)
              #
              # OK, we found it in libsocket.
              #
              set(PCAP_LINK_LIBRARIES socket nsl ${PCAP_LINK_LIBRARIES})
          else(LIBSOCKET_HAS_GETADDRINFO)
              #
              # We didn't find it.
              #
              message(FATAL_ERROR "getaddrinfo is required, but wasn't found")
          endif(LIBSOCKET_HAS_GETADDRINFO)
  
          #
          # OK, do we have recvmsg() in libxnet?
          # We also link with libsocket and libnsl.
          #
          cmake_push_check_state()
          set(CMAKE_REQUIRED_LIBRARIES socket nsl)
          check_library_exists(xnet recvmsg "" LIBXNET_HAS_RECVMSG)
          cmake_pop_check_state()
          if(LIBXNET_HAS_RECVMSG)
              #
              # Yes - link with it as well.
              #
              set(PCAP_LINK_LIBRARIES xnet ${PCAP_LINK_LIBRARIES})
          endif(LIBXNET_HAS_RECVMSG)
      endif(NOT STDLIBS_HAVE_GETADDRINFO)
  
      # DLPI needs putmsg under HPUX so test for -lstr while we're at it
      check_function_exists(putmsg STDLIBS_HAVE_PUTMSG)
      if(NOT STDLIBS_HAVE_PUTMSG)
          check_library_exists(str putmsg "" LIBSTR_HAS_PUTMSG)
          if(LIBSTR_HAS_PUTMSG)
              set(PCAP_LINK_LIBRARIES str ${PCAP_LINK_LIBRARIES})
          endif(LIBSTR_HAS_PUTMSG)
      endif(NOT STDLIBS_HAVE_PUTMSG)
  endif(WIN32)
  
  #
  # Check for reentrant versions of getnetbyname_r(), as provided by
  # Linux (glibc), Solaris/IRIX, and AIX (with three different APIs!).
  # If we don't find one, we just use getnetbyname(), which uses
  # thread-specific data on many platforms, but doesn't use it on
  # NetBSD or OpenBSD, and may not use it on older versions of other
  # platforms.
  #
  # Only do the check if we have a declaration of getnetbyname_r();
  # without it, we can't check which API it has.  (We assume that
  # if there's a declaration, it has a prototype, so that the API
  # can be checked.)
  #
  cmake_push_check_state()
  set(CMAKE_REQUIRED_LIBRARIES ${PCAP_LINK_LIBRARIES})
  check_symbol_exists(getnetbyname_r netdb.h NETDB_H_DECLARES_GETNETBYNAME_R)
  if(NETDB_H_DECLARES_GETNETBYNAME_R)
      check_c_source_compiles(
  "#include <netdb.h>
  
  int
  main(void)
  {
      struct netent netent_buf;
      char buf[1024];
      struct netent *resultp;
      int h_errnoval;
  
      return getnetbyname_r((const char *)0, &netent_buf, buf, sizeof buf, &resultp, &h_errnoval);
  }
  "
          HAVE_LINUX_GETNETBYNAME_R)
      if(NOT HAVE_LINUX_GETNETBYNAME_R)
          check_c_source_compiles(
  "#include <netdb.h>
  
  int
  main(void)
  {
      struct netent netent_buf;
      char buf[1024];
  
      return getnetbyname_r((const char *)0, &netent_buf, buf, (int)sizeof buf) != NULL;
  }
  "
              HAVE_SOLARIS_IRIX_GETNETBYNAME_R)
          if(NOT HAVE_SOLARIS_IRIX_GETNETBYNAME_R)
              check_c_source_compiles(
  "#include <netdb.h>
  
  int
  main(void)
  {
      struct netent netent_buf;
      struct netent_data net_data;
  
      return getnetbyname_r((const char *)0, &netent_buf, &net_data);
  }
  "
                  HAVE_AIX_GETNETBYNAME_R)
          endif(NOT HAVE_SOLARIS_IRIX_GETNETBYNAME_R)
      endif(NOT HAVE_LINUX_GETNETBYNAME_R)
  endif(NETDB_H_DECLARES_GETNETBYNAME_R)
  cmake_pop_check_state()
  
  #
  # Check for reentrant versions of getprotobyname_r(), as provided by
  # Linux (glibc), Solaris/IRIX, and AIX (with three different APIs!).
  # If we don't find one, we just use getprotobyname(), which uses
  # thread-specific data on many platforms, but doesn't use it on
  # NetBSD or OpenBSD, and may not use it on older versions of other
  # platforms.
  #
  # Only do the check if we have a declaration of getprotobyname_r();
  # without it, we can't check which API it has.  (We assume that
  # if there's a declaration, it has a prototype, so that the API
  # can be checked.)
  #
  cmake_push_check_state()
  set(CMAKE_REQUIRED_LIBRARIES ${PCAP_LINK_LIBRARIES})
  check_symbol_exists(getprotobyname_r netdb.h NETDB_H_DECLARES_GETPROTOBYNAME_R)
  if(NETDB_H_DECLARES_GETPROTOBYNAME_R)
      check_c_source_compiles(
  "#include <netdb.h>
  
  int
  main(void)
  {
      struct protoent protoent_buf;
      char buf[1024];
      struct protoent *resultp;
  
      return getprotobyname_r((const char *)0, &protoent_buf, buf, sizeof buf, &resultp);
  }
  "
          HAVE_LINUX_GETPROTOBYNAME_R)
      if(NOT HAVE_LINUX_GETPROTOBYNAME_R)
          check_c_source_compiles(
  "#include <netdb.h>
  
  int
  main(void)
  {
      struct protoent protoent_buf;
      char buf[1024];
  
      return getprotobyname_r((const char *)0, &protoent_buf, buf, (int)sizeof buf) != NULL;
  }
  "
              HAVE_SOLARIS_IRIX_GETPROTOBYNAME_R)
          if(NOT HAVE_SOLARIS_IRIX_GETPROTOBYNAME_R)
              check_c_source_compiles(
  "#include <netdb.h>
  
  int
  main(void)
  {
      struct protoent protoent_buf;
      struct protoent_data proto_data;
  
      return getprotobyname_r((const char *)0, &protoent_buf, &proto_data);
  }
  "
                  HAVE_AIX_GETPROTOBYNAME_R)
          endif(NOT HAVE_SOLARIS_IRIX_GETPROTOBYNAME_R)
      endif(NOT HAVE_LINUX_GETPROTOBYNAME_R)
  endif(NETDB_H_DECLARES_GETPROTOBYNAME_R)
  cmake_pop_check_state()
  
  #
  # Data types.
  #
  # XXX - there's no check_type() macro that's like check_type_size()
  # except that it only checks for the existence of the structure type,
  # so we use check_type_size() and ignore the size.
  #
  cmake_push_check_state()
  if(WIN32)
      set(CMAKE_EXTRA_INCLUDE_FILES winsock2.h)
  else(WIN32)
      set(CMAKE_EXTRA_INCLUDE_FILES unistd.h sys/socket.h)
  endif(WIN32)
  check_type_size("struct sockaddr_storage" STRUCT_SOCKADDR_STORAGE)
  check_type_size("socklen_t" SOCKLEN_T)
  cmake_pop_check_state()
  
  #
  # Structure fields.
  #
  if(WIN32)
      check_struct_has_member("struct sockaddr" sa_len winsock2.h HAVE_STRUCT_SOCKADDR_SA_LEN)
  else(WIN32)
      check_struct_has_member("struct sockaddr" sa_len sys/socket.h HAVE_STRUCT_SOCKADDR_SA_LEN)
  endif(WIN32)
  
  #
  # Do we have ffs(), and is it declared in <strings.h>?
  #
  check_function_exists(ffs HAVE_FFS)
  if(HAVE_FFS)
      #
      # OK, we have ffs().  Is it declared in <strings.h>?
      #
      # This test fails if we don't have <strings.h> or if we do
      # but it doesn't declare ffs().
      #
      check_symbol_exists(ffs strings.h STRINGS_H_DECLARES_FFS)
  endif()
  
  #
  # This requires the libraries that we require, as ether_hostton might be
  # in one of those libraries.  That means we have to do this after
  # we check for those libraries.
  #
  # You are in a twisty little maze of UN*Xes, all different.
  # Some might not have ether_hostton().
  # Some might have it and declare it in <net/ethernet.h>.
  # Some might have it and declare it in <netinet/ether.h>
  # Some might have it and declare it in <sys/ethernet.h>.
  # Some might have it and declare it in <arpa/inet.h>.
  # Some might have it and declare it in <netinet/if_ether.h>.
  # Some might have it and not declare it in any header file.
  #
  # Before you is a C compiler.
  #
  cmake_push_check_state()
  set(CMAKE_REQUIRED_LIBRARIES ${PCAP_LINK_LIBRARIES})
  check_function_exists(ether_hostton HAVE_ETHER_HOSTTON)
  if(HAVE_ETHER_HOSTTON)
      #
      # OK, we have ether_hostton().  Is it declared in <net/ethernet.h>?
      #
      # This test fails if we don't have <net/ethernet.h> or if we do
      # but it doesn't declare ether_hostton().
      #
      check_symbol_exists(ether_hostton net/ethernet.h NET_ETHERNET_H_DECLARES_ETHER_HOSTTON)
      if(NET_ETHERNET_H_DECLARES_ETHER_HOSTTON)
          #
          # Yes - we have it declared.
          #
          set(HAVE_DECL_ETHER_HOSTTON TRUE)
      endif()
      #
      # Did that succeed?
      #
      if(NOT HAVE_DECL_ETHER_HOSTTON)
          #
          # No - how about <netinet/ether.h>, as on Linux?
          #
          # This test fails if we don't have <netinet/ether.h>
          # or if we do but it doesn't declare ether_hostton().
          #
          check_symbol_exists(ether_hostton netinet/ether.h NETINET_ETHER_H_DECLARES_ETHER_HOSTTON)
          if(NETINET_ETHER_H_DECLARES_ETHER_HOSTTON)
              #
              # Yes - we have it declared.
              #
              set(HAVE_DECL_ETHER_HOSTTON TRUE)
          endif()
      endif()
      #
      # Did that succeed?
      #
      if(NOT HAVE_DECL_ETHER_HOSTTON)
          #
          # No - how about <sys/ethernet.h>, as on Solaris 10 and later?
          #
          # This test fails if we don't have <sys/ethernet.h>
          # or if we do but it doesn't declare ether_hostton().
          #
          check_symbol_exists(ether_hostton sys/ethernet.h SYS_ETHERNET_H_DECLARES_ETHER_HOSTTON)
          if(SYS_ETHERNET_H_DECLARES_ETHER_HOSTTON)
              #
              # Yes - we have it declared.
              #
              set(HAVE_DECL_ETHER_HOSTTON TRUE)
          endif()
      endif()
      #
      # Did that succeed?
      #
      if(NOT HAVE_DECL_ETHER_HOSTTON)
          #
          # No, how about <arpa/inet.h>, as on AIX?
          #
          # This test fails if we don't have <arpa/inet.h>
          # or if we do but it doesn't declare ether_hostton().
          #
          check_symbol_exists(ether_hostton arpa/inet.h ARPA_INET_H_DECLARES_ETHER_HOSTTON)
          if(ARPA_INET_H_DECLARES_ETHER_HOSTTON)
              #
              # Yes - we have it declared.
              #
              set(HAVE_DECL_ETHER_HOSTTON TRUE)
          endif()
      endif()
      #
      # Did that succeed?
      #
      if(NOT HAVE_DECL_ETHER_HOSTTON)
          #
          # No, how about <netinet/if_ether.h>?
          # On some platforms, it requires <net/if.h> and
          # <netinet/in.h>, and we always include it with
          # both of them, so test it with both of them.
          #
          # This test fails if we don't have <netinet/if_ether.h>
          # and the headers we include before it, or if we do but
          # <netinet/if_ether.h> doesn't declare ether_hostton().
          #
          check_symbol_exists(ether_hostton "sys/types.h;sys/socket.h;net/if.h;netinet/in.h;netinet/if_ether.h" NETINET_IF_ETHER_H_DECLARES_ETHER_HOSTTON)
          if(NETINET_IF_ETHER_H_DECLARES_ETHER_HOSTTON)
              #
              # Yes - we have it declared.
              #
              set(HAVE_DECL_ETHER_HOSTTON TRUE)
          endif()
      endif()
      #
      # After all that, is ether_hostton() declared?
      #
      if(NOT HAVE_DECL_ETHER_HOSTTON)
          #
          # No, we'll have to declare it ourselves.
          # Do we have "struct ether_addr" if we include <netinet/if_ether.h>?
          #
          # XXX - there's no check_type() macro that's like check_type_size()
          # except that it only checks for the existence of the structure type,
          # so we use check_type_size() and ignore the size.
          #
          cmake_push_check_state()
          set(CMAKE_EXTRA_INCLUDE_FILES sys/types.h sys/socket.h net/if.h netinet/in.h netinet/if_ether.h)
          check_type_size("struct ether_addr" STRUCT_ETHER_ADDR)
          cmake_pop_check_state()
      endif()
  endif()
  cmake_pop_check_state()
  
  #
  # Large file support on UN*X, a/k/a LFS.
  #
  if(NOT WIN32)
    include(FindLFS)
    if(LFS_FOUND)
      #
      # Add the required #defines.
      #
      add_definitions(${LFS_DEFINITIONS})
    endif()
  
    #
    # Check for fseeko as well.
    #
    include(FindFseeko)
    if(FSEEKO_FOUND)
      set(HAVE_FSEEKO ON)
  
      #
      # Add the required #defines.
      #
      add_definitions(${FSEEKO_DEFINITIONS})
    endif()
  endif()
  
  if(INET6)
      message(STATUS "Support IPv6")
  endif(INET6)
  
  #
  # Pthreads.
  # We might need them, because some libraries we use might use them,
  # but we don't necessarily need them.
  # That's only on UN*X; on Windows, if they use threads, we assume
  # they're native Windows threads.
  #
  if(NOT WIN32)
    set(CMAKE_THREAD_PREFER_PTHREAD ON)
    find_package(Threads)
    if(NOT CMAKE_USE_PTHREADS_INIT)
      #
      # If it's not pthreads, we won't use it; we use it for libraries
      # that require it.
      #
      set(CMAKE_THREAD_LIBS_INIT "")
    endif(NOT CMAKE_USE_PTHREADS_INIT)
  endif(NOT WIN32)
  
  ######################################
  # Input files
  ######################################
  
  set(PROJECT_SOURCE_LIST_C
      bpf_dump.c
      bpf_filter.c
      bpf_image.c
      etherent.c
      fmtutils.c
      gencode.c
      nametoaddr.c
      optimize.c
      pcap-common.c
      pcap.c
      savefile.c
      sf-pcapng.c
      sf-pcap.c
  )
  
  if(WIN32)
      set(PROJECT_SOURCE_LIST_C ${PROJECT_SOURCE_LIST_C} missing/win_snprintf.c)
  else()
      if(NOT HAVE_SNPRINTF)
          set(PROJECT_SOURCE_LIST_C ${PROJECT_SOURCE_LIST_C} missing/snprintf.c)
      endif(NOT HAVE_SNPRINTF)
      if(NOT HAVE_STRTOK_R)
          set(PROJECT_SOURCE_LIST_C ${PROJECT_SOURCE_LIST_C} missing/strtok_r.c)
      endif(NOT HAVE_STRTOK_R)
  endif(WIN32)
  
  #
  # Determine the main pcap-XXX.c file to use, and the libraries with
  # which we need to link libpcap, if any.
  #
  if(WIN32)
      #
      # Windows.
      #
      # Has the user explicitly specified a capture type?
      #
      if(PCAP_TYPE STREQUAL "")
          #
          # The user didn't explicitly specify a capture mechanism.
          # Check whether we have packet.dll.
          #
          if(HAVE_PACKET32)
              #
              # We have packet.dll.
              # Set the capture type to NPF.
              #
              set(PCAP_TYPE npf)
          else()
              #
              # We don't have any capture type we know about, so just use
              # the null capture type, and only support reading (and writing)
              # capture files.
              #
              set(PCAP_TYPE null)
          endif()
      endif()
  else()
      #
      # UN*X.
      #
      # Figure out what type of packet capture mechanism we have, and
      # what libraries we'd need to link libpcap with, if any.
      #
  
      #
      # Has the user explicitly specified a capture type?
      #
      if(PCAP_TYPE STREQUAL "")
          #
          # Check for a bunch of headers for various packet capture mechanisms.
          #
          check_include_files("sys/types.h;net/bpf.h" HAVE_NET_BPF_H)
          if(HAVE_NET_BPF_H)
              #
              # Does it define BIOCSETIF?
              # I.e., is it a header for an LBL/BSD-style capture
              # mechanism, or is it just a header for a BPF filter
              # engine?  Some versions of Arch Linux, for example,
              # have a net/bpf.h that doesn't define BIOCSETIF;
              # as it's a Linux, it should use packet sockets,
              # instead.
              #
              #
              # We need:
              #
              #  sys/types.h, because FreeBSD 10's net/bpf.h
              #  requires that various BSD-style integer types
              #  be defined;
              #
              #  sys/ioctl.h and, if we have it, sys/ioccom.h,
              #  because net/bpf.h defines ioctls;
              #
              #  net/if.h, because it defines some structures
              #  used in ioctls defined by net/bpf.h;
              #
              #  sys/socket.h, because OpenBSD 5.9's net/bpf.h
              #  defines some structure fields as being
              #  struct sockaddrs;
              #
              # and net/bpf.h doesn't necessarily include all
              # of those headers itself.
              #
              if(HAVE_SYS_IOCCOM_H)
                  check_symbol_exists(BIOCSETIF "sys/types.h;sys/ioctl.h;sys/socket.h;sys/ioccom.h;net/bpf.h;net/if.h" BPF_H_DEFINES_BIOCSETIF)
              else(HAVE_SYS_IOCCOM_H)
                  check_symbol_exists(BIOCSETIF "sys/types.h;sys/ioctl.h;sys/socket.h;net/bpf.h;net/if.h" BPF_H_DEFINES_BIOCSETIF)
              endif(HAVE_SYS_IOCCOM_H)
          endif(HAVE_NET_BPF_H)
          check_include_file(net/pfilt.h HAVE_NET_PFILT_H)
          check_include_file(net/enet.h HAVE_NET_ENET_H)
          check_include_file(net/nit.h HAVE_NET_NIT_H)
          check_include_file(sys/net/nit.h HAVE_SYS_NET_NIT_H)
          check_include_file(linux/socket.h HAVE_LINUX_SOCKET_H)
          check_include_file(net/raw.h HAVE_NET_RAW_H)
          check_include_file(sys/dlpi.h HAVE_SYS_DLPI_H)
  
          if(BPF_H_DEFINES_BIOCSETIF)
              #
              # BPF.
              # Check this before DLPI, so that we pick BPF on
              # Solaris 11 and later.
              #
              set(PCAP_TYPE bpf)
          elseif(HAVE_LINUX_SOCKET_H)
              #
              # No prizes for guessing this one.
              #
              set(PCAP_TYPE linux)
          elseif(HAVE_NET_PFILT_H)
              #
              # DEC OSF/1, Digital UNIX, Tru64 UNIX
              #
              set(PCAP_TYPE pf)
          elseif(HAVE_NET_ENET_H)
              #
              # Stanford Enetfilter.
              #
              set(PCAP_TYPE enet)
          elseif(HAVE_NET_NIT_H)
              #
              # SunOS 4.x STREAMS NIT.
              #
              set(PCAP_TYPE snit)
          elseif(HAVE_SYS_NET_NIT_H)
              #
              # Pre-SunOS 4.x non-STREAMS NIT.
              #
              set(PCAP_TYPE nit)
          elseif(HAVE_NET_RAW_H)
              #
              # IRIX snoop.
              #
              set(PCAP_TYPE snoop)
          elseif(HAVE_SYS_DLPI_H)
              #
              # DLPI on pre-Solaris 11 SunOS 5, HP-UX, possibly others.
              #
              set(PCAP_TYPE dlpi)
          else()
              #
              # Nothing we support.
              #
              set(PCAP_TYPE null)
          endif()
      endif()
  endif(WIN32)
  message(STATUS "Packet capture mechanism type: ${PCAP_TYPE}")
  
  #
  # Do capture-mechanism-dependent tests.
  #
  if(WIN32)
      if(PCAP_TYPE STREQUAL "npf")
          #
          # Link with packet.dll before WinSock2.
          #
          set(PCAP_LINK_LIBRARIES ${PACKET_LIBRARIES} ${PCAP_LINK_LIBRARIES})
      elseif(PCAP_TYPE STREQUAL "null")
      else()
          message(ERROR "${PCAP_TYPE} is not a valid pcap type")
      endif()
  else(WIN32)
      if(PCAP_TYPE STREQUAL "dlpi")
          #
          # Needed for common functions used by pcap-[dlpi,libdlpi].c
          #
          set(PROJECT_SOURCE_LIST_C ${PROJECT_SOURCE_LIST_C} dlpisubs.c)
  
          #
          # Checks for some header files.
          #
          check_include_file(sys/bufmod.h HAVE_SYS_BUFMOD_H)
          check_include_file(sys/dlpi_ext.h HAVE_SYS_DLPI_EXT_H)
  
          #
          # Checks to see if Solaris has the public libdlpi(3LIB) library.
          # Note: The existence of /usr/include/libdlpi.h does not mean it is the
          # public libdlpi(3LIB) version. Before libdlpi was made public, a
          # private version also existed, which did not have the same APIs.
          # Due to a gcc bug, the default search path for 32-bit libraries does
          # not include /lib, we add it explicitly here.
          # [http://bugs.opensolaris.org/view_bug.do?bug_id=6619485].
          # Also, due to the bug above applications that link to libpcap with
          # libdlpi will have to add "-L/lib" option to "configure".
          #
          cmake_push_check_state()
          set(CMAKE_REQUIRED_FLAGS "-L/lib")
          set(CMAKE_REQUIRED_LIBRARIES dlpi)
          check_function_exists(dlpi_walk HAVE_LIBDLPI)
          cmake_pop_check_state()
          if(HAVE_LIBDLPI)
              #
              # XXX - add -L/lib
              #
              set(PCAP_LINK_LIBRARIES ${PCAP_LINK_LIBRARIES} dlpi)
              set(PCAP_TYPE libdlpi)
          endif()
  
          #
          # This check is for Solaris with DLPI support for passive modes.
          # See dlpi(7P) for more details.
          #
          # XXX - there's no check_type() macro that's like check_type_size()
          # except that it only checks for the existence of the structure type,
          # so we use check_type_size() and ignore the size.
          #
          cmake_push_check_state()
          set(CMAKE_EXTRA_INCLUDE_FILES sys/types.h sys/dlpi.h)
          check_type_size(dl_passive_req_t DL_PASSIVE_REQ_T)
          cmake_pop_check_state()
      elseif(PCAP_TYPE STREQUAL "linux")
          #
          # Do we have the wireless extensions?
          # linux/wireless.h requires sys/socket.h.
          #
          check_include_files("sys/socket.h;linux/wireless.h" HAVE_LINUX_WIRELESS_H)
  
          #
          # Do we have libnl?
          #
          if(BUILD_WITH_LIBNL)
              #
              # Try libnl 3.x first.
              #
              cmake_push_check_state()
              set(CMAKE_REQUIRED_LIBRARIES nl-3)
              check_function_exists(nl_socket_alloc HAVE_LIBNL)
              cmake_pop_check_state()
              if(HAVE_LIBNL)
                  #
                  # Yes, we have libnl 3.x.
                  #
                  set(PCAP_LINK_LIBRARIES nl-genl-3 nl-3 ${PCAP_LINK_LIBRARIES})
                  set(HAVE_LIBNL_3_x ON)
                  set(HAVE_LIBNL_NLE ON)
                  set(HAVE_LIBNL_SOCKETS ON)
                  include_directories("/usr/include/libnl3")
              else()
                  #
                  # Try libnl 2.x.
                  #
                  cmake_push_check_state()
                  set(CMAKE_REQUIRED_LIBRARIES nl)
                  check_function_exists(nl_socket_alloc HAVE_LIBNL)
                  cmake_pop_check_state()
                  if(HAVE_LIBNL)
                      #
                      # Yes, we have libnl 2.x.
                      #
                      set(PCAP_LINK_LIBRARIES nl-genl nl ${PCAP_LINK_LIBRARIES})
                      set(HAVE_LIBNL_2_x ON)
                      set(HAVE_LIBNL_NLE ON)
                      set(HAVE_LIBNL_SOCKETS ON)
                  else()
                      #
                      # No, we don't; do we have libnl 1.x?
                      #
                      cmake_push_check_state()
                      set(CMAKE_REQUIRED_LIBRARIES nl)
                      check_function_exists(nl_handle_alloc HAVE_LIBNL)
                      cmake_pop_check_state()
                      if(HAVE_LIBNL)
                          set(PCAP_LINK_LIBRARIES nl ${PCAP_LINK_LIBRARIES})
                      endif()
                  endif()
              endif()
          endif()
  
          check_include_file(linux/ethtool.h HAVE_LINUX_ETHTOOL_H)
  
          #
          # Checks to see if tpacket_stats is defined in linux/if_packet.h
          # If so then pcap-linux.c can use this to report proper statistics.
          #
          # XXX - there's no check_type() macro that's like check_type_size()
          # except that it only checks for the existence of the structure type,
          # so we use check_type_size() and ignore the size.
          #
          cmake_push_check_state()
          set(CMAKE_EXTRA_INCLUDE_FILES linux/if_packet.h)
          check_type_size("struct tpacket_stats" STRUCT_TPACKET_STATS)
          cmake_pop_check_state()
  
          check_struct_has_member("struct tpacket_auxdata" tp_vlan_tci linux/if_packet.h HAVE_STRUCT_TPACKET_AUXDATA_TP_VLAN_TCI)
      elseif(PCAP_TYPE STREQUAL "bpf")
          #
          # Check whether we have the *BSD-style ioctls.
          #
          check_include_files("sys/types.h;net/if_media.h" HAVE_NET_IF_MEDIA_H)
  
          #
          # Check whether we have struct BPF_TIMEVAL.
          #
          # XXX - there's no check_type() macro that's like check_type_size()
          # except that it only checks for the existence of the structure type,
          # so we use check_type_size() and ignore the size.
          #
          cmake_push_check_state()
          if(HAVE_SYS_IOCCOM_H)
              set(CMAKE_EXTRA_INCLUDE_FILES sys/types.h sys/ioccom.h net/bpf.h)
              check_type_size("struct BPF_TIMEVAL" STRUCT_BPF_TIMEVAL)
          else()
              set(CMAKE_EXTRA_INCLUDE_FILES  sys/types.h net/bpf.h)
              check_type_size("struct BPF_TIMEVAL" STRUCT_BPF_TIMEVAL)
          endif()
          cmake_pop_check_state()
      elseif(PCAP_TYPE STREQUAL "null")
      else()
          message(FATAL_ERROR "${PCAP_TYPE} is not a valid pcap type")
      endif()
  endif(WIN32)
  
  set(PROJECT_SOURCE_LIST_C ${PROJECT_SOURCE_LIST_C} pcap-${PCAP_TYPE}.c)
  
  #
  # Now figure out how we get a list of interfaces and addresses,
  # if we support capturing.  Don't bother if we don't support
  # capturing.
  #
  if(NOT WIN32)
      #
      # UN*X - figure out what type of interface list mechanism we
      # have.
      #
      # If the capture type is null, that means we can't capture,
      # so we can't open any capture devices, so we won't return
      # any interfaces.
      #
      if(NOT PCAP_TYPE STREQUAL "null")
          cmake_push_check_state()
          set(CMAKE_REQUIRED_LIBRARIES ${PCAP_LINK_LIBRARIES})
          check_function_exists(getifaddrs HAVE_GETIFADDRS)
          cmake_pop_check_state()
          if(NOT HAVE_GETIFADDRS)
              #
              # It's not in the libraries that, at this point, we've
              # found we need to link libpcap with.
              #
              # It's in libsocket on Solaris and possibly other OSes;
              # as long as we're not linking with libxnet, check there.
              #
              # NOTE: if you hand check_library_exists as its last
              # argument a variable that's been set, it skips the test,
              # so we need different variables.
              #
              if(NOT LIBXNET_HAS_GETHOSTBYNAME)
                  check_library_exists(socket getifaddrs "" SOCKET_HAS_GETIFADDRS)
                  if(SOCKET_HAS_GETIFADDRS)
                      set(PCAP_LINK_LIBRARIES socket ${PCAP_LINK_LIBRARIES})
                      set(HAVE_GETIFADDRS TRUE)
                  endif()
              endif()
          endif()
          if(HAVE_GETIFADDRS)
              #
              # We have "getifaddrs()"; make sure we have <ifaddrs.h>
              # as well, just in case some platform is really weird.
              # It may require that sys/types.h be included first,
              # so include it first.
              #
              check_include_files("sys/types.h;ifaddrs.h" HAVE_IFADDRS_H)
              if(HAVE_IFADDRS_H)
                  #
                  # We have the header, so we use "getifaddrs()" to
                  # get the list of interfaces.
                  #
                  set(FINDALLDEVS_TYPE getad)
              else()
                  #
                  # We don't have the header - give up.
                  # XXX - we could also fall back on some other
                  # mechanism, but, for now, this'll catch this
                  # problem so that we can at least try to figure
                  # out something to do on systems with "getifaddrs()"
                  # but without "ifaddrs.h", if there is something
                  # we can do on those systems.
                  #
                  message(FATAL_ERROR "Your system has getifaddrs() but doesn't have a usable <ifaddrs.h>.")
              endif()
          else()
              #
              # Well, we don't have "getifaddrs()", at least not with the
              # libraries with which we've decided we need to link
              # libpcap with, so we have to use some other mechanism.
              #
              # Note that this may happen on Solaris, which has
              # getifaddrs(), but in -lsocket, not in -lxnet, so we
              # won't find it if we link with -lxnet, which we want
              # to do for other reasons.
              #
              # For now, we use either the SIOCGIFCONF ioctl or the
              # SIOCGLIFCONF ioctl, preferring the latter if we have
              # it; the latter is a Solarisism that first appeared
              # in Solaris 8.  (Solaris's getifaddrs() appears to
              # be built atop SIOCGLIFCONF; using it directly
              # avoids a not-all-that-useful middleman.)
              #
              try_compile(HAVE_SIOCGLIFCONF ${CMAKE_CURRENT_BINARY_DIR} "${pcap_SOURCE_DIR}/cmake/have_siocglifconf.c" )
              if(HAVE_SIOCGLIFCONF)
                  set(FINDALLDEVS_TYPE glifc)
              else()
                  set(FINDALLDEVS_TYPE gifc)
              endif()
          endif()
          message(STATUS "Find-interfaces mechanism type: ${FINDALLDEVS_TYPE}")
          set(PROJECT_SOURCE_LIST_C ${PROJECT_SOURCE_LIST_C} fad-${FINDALLDEVS_TYPE}.c)
      endif()
  endif()
  
  # Check for hardware timestamp support.
  if(CMAKE_SYSTEM_NAME STREQUAL "Linux")
      check_include_file(linux/net_tstamp.h HAVE_LINUX_NET_TSTAMP_H)
  endif()
  
  #
  # Check for additional native sniffing capabilities.
  #
  
  # Check for USB sniffing support on Linux.
  # On FreeBSD, it uses BPF, so we don't need to do anything special here.
  if(NOT DISABLE_USB)
      if(CMAKE_SYSTEM_NAME STREQUAL "Linux")
          set(PCAP_SUPPORT_USB TRUE)
          set(PROJECT_SOURCE_LIST_C ${PROJECT_SOURCE_LIST_C} pcap-usb-linux.c)
          set(LINUX_USB_MON_DEV /dev/usbmon)
          #
          # Do we have a version of <linux/compiler.h> available?
          # If so, we might need it for <linux/usbdevice_fs.h>.
          #
          check_include_files("linux/compiler.h" HAVE_LINUX_COMPILER_H)
          if(HAVE_LINUX_COMPILER_H)
              #
              # Yes - include it when testing for <linux/usbdevice_fs.h>.
              #
              check_include_files("linux/compiler.h;linux/usbdevice_fs.h" HAVE_LINUX_USBDEVICE_FS_H)
          else(HAVE_LINUX_COMPILER_H)
              check_include_files("linux/usbdevice_fs.h" HAVE_LINUX_USBDEVICE_FS_H)
          endif(HAVE_LINUX_COMPILER_H)
          if(HAVE_LINUX_USBDEVICE_FS_H)
              #
              # OK, does it define bRequestType?  Older versions of the kernel
              # define fields with names like "requesttype, "request", and
              # "value", rather than "bRequestType", "bRequest", and
              # "wValue".
              #
              if(HAVE_LINUX_COMPILER_H)
                  check_struct_has_member("struct usbdevfs_ctrltransfer" bRequestType "linux/compiler.h;linux/usbdevice_fs.h" HAVE_STRUCT_USBDEVFS_CTRLTRANSFER_BREQUESTTYPE)
              else(HAVE_LINUX_COMPILER_H)
                  check_struct_has_member("struct usbdevfs_ctrltransfer" bRequestType "linux/usbdevice_fs.h" HAVE_STRUCT_USBDEVFS_CTRLTRANSFER_BREQUESTTYPE)
              endif(HAVE_LINUX_COMPILER_H)
          endif()
      endif()
  endif()
  
  # Check for netfilter sniffing support.
  if(CMAKE_SYSTEM_NAME STREQUAL "Linux")
      #
      # Life's too short to deal with trying to get this to compile
      # if you don't get the right types defined with
      # __KERNEL_STRICT_NAMES getting defined by some other include.
      #
      # Check whether the includes Just Work.  If not, don't turn on
      # netfilter support.
      #
      check_c_source_compiles(
  "#include <sys/socket.h>
  #include <netinet/in.h>
  #include <linux/types.h>
  
  #include <linux/netlink.h>
  #include <linux/netfilter.h>
  #include <linux/netfilter/nfnetlink.h>
  #include <linux/netfilter/nfnetlink_log.h>
  #include <linux/netfilter/nfnetlink_queue.h>
  
  int
  main(void)
  {
      return 0;
  }
  "
          PCAP_SUPPORT_NETFILTER)
      if(PCAP_SUPPORT_NETFILTER)
          set(PROJECT_SOURCE_LIST_C ${PROJECT_SOURCE_LIST_C} pcap-netfilter-linux.c)
      endif(PCAP_SUPPORT_NETFILTER)
  endif()
  
  # Check for netmap sniffing support.
  if(NOT DISABLE_NETMAP)
      #
      # Check whether net/netmap_user.h is usable if NETMAP_WITH_LIBS is
      # defined; it's not usable on DragonFly BSD 4.6 if NETMAP_WITH_LIBS
      # is defined, for example, as it includes a non-existent malloc.h
      # header.
      #
      check_c_source_compiles(
  "#define NETMAP_WITH_LIBS
  #include <net/netmap_user.h>
  
  int
  main(void)
  {
      return 0;
  }
  "
          PCAP_SUPPORT_NETMAP)
      if(PCAP_SUPPORT_NETMAP)
          set(PROJECT_SOURCE_LIST_C ${PROJECT_SOURCE_LIST_C} pcap-netmap.c)
      endif(PCAP_SUPPORT_NETMAP)
  endif()
  
  # Check for Bluetooth sniffing support
  if(NOT DISABLE_BLUETOOTH)
      if(CMAKE_SYSTEM_NAME STREQUAL "Linux")
          check_include_file(bluetooth/bluetooth.h HAVE_BLUETOOTH_BLUETOOTH_H)
          if(HAVE_BLUETOOTH_BLUETOOTH_H)
              set(PCAP_SUPPORT_BT TRUE)
              set(PROJECT_SOURCE_LIST_C ${PROJECT_SOURCE_LIST_C} pcap-bt-linux.c)
              #
              # OK, does struct sockaddr_hci have an hci_channel
              # member?
              #
              check_struct_has_member("struct sockaddr_hci" hci_channel "bluetooth/bluetooth.h;bluetooth/hci.h" HAVE_STRUCT_SOCKADDR_HCI_HCI_CHANNEL)
              if(HAVE_STRUCT_SOCKADDR_HCI_HCI_CHANNEL)
                  #
                  # OK, is HCI_CHANNEL_MONITOR defined?
                  #
                 check_c_source_compiles(
  "#include <bluetooth/bluetooth.h>
  #include <bluetooth/hci.h>
  
  int
  main(void)
  {
      u_int i = HCI_CHANNEL_MONITOR;
      return 0;
  }
  "
                     PCAP_SUPPORT_BT_MONITOR)
                 if(PCAP_SUPPORT_BT_MONITOR)
                     #
                     # Yes, so we can also support Bluetooth monitor
                     # sniffing.
                     #
                     set(PROJECT_SOURCE_LIST_C ${PROJECT_SOURCE_LIST_C} pcap-bt-monitor-linux.c)
                 endif(PCAP_SUPPORT_BT_MONITOR)
              endif(HAVE_STRUCT_SOCKADDR_HCI_HCI_CHANNEL)
          endif(HAVE_BLUETOOTH_BLUETOOTH_H)
      endif()
  endif()
  
  # Check for Bluetooth sniffing support
  if(NOT DISABLE_DBUS)
      #
      # We don't support D-Bus sniffing on macOS; see
      #
      # https://bugs.freedesktop.org/show_bug.cgi?id=74029
      #
      if(APPLE)
          message(FATAL_ERROR "Due to freedesktop.org bug 74029, D-Bus capture support is not available on macOS")
      endif(APPLE)
      include(FindPkgConfig)
      pkg_check_modules(DBUS dbus-1)
      if(DBUS_FOUND)
          set(PCAP_SUPPORT_DBUS TRUE)
          set(PROJECT_SOURCE_LIST_C ${PROJECT_SOURCE_LIST_C} pcap-dbus.c)
          include_directories(${DBUS_INCLUDE_DIRS})
          set(PCAP_LINK_LIBRARIES ${PCAP_LINK_LIBRARIES} ${DBUS_LIBRARIES})
      endif(DBUS_FOUND)
  endif(NOT DISABLE_DBUS)
  
  # Check for RDMA sniffing support
  if(NOT DISABLE_RDMA)
      check_library_exists(ibverbs ibv_get_device_list "" LIBIBVERBS_HAS_IBV_GET_DEVICE_LIST)
      if(LIBIBVERBS_HAS_IBV_GET_DEVICE_LIST)
          check_include_file(infiniband/verbs.h HAVE_INFINIBAND_VERBS_H)
          if(HAVE_INFINIBAND_VERBS_H)
              check_symbol_exists(ibv_create_flow infiniband/verbs.h PCAP_SUPPORT_RDMASNIFF)
              if(PCAP_SUPPORT_RDMASNIFF)
                  set(PROJECT_SOURCE_LIST_C ${PROJECT_SOURCE_LIST_C} pcap-rdmasniff.c)
                  set(PCAP_LINK_LIBRARIES ibverbs ${PCAP_LINK_LIBRARIES})
              endif(PCAP_SUPPORT_RDMASNIFF)
          endif(HAVE_INFINIBAND_VERBS_H)
      endif(LIBIBVERBS_HAS_IBV_GET_DEVICE_LIST)
  endif(NOT DISABLE_RDMA)
  
  #
  # Check for sniffing capabilities using third-party APIs.
  #
  
  # Check for Endace DAG card support.
  if(NOT DISABLE_DAG)
      #
      # Try to find the DAG header file and library.
      #
      find_package(DAG)
  
      #
      # Did we succeed?
      #
      if(DAG_FOUND)
          #
          # Yes.
          # Check for various DAG API functions.
          #
          cmake_push_check_state()
          set(CMAKE_REQUIRED_INCLUDES ${DAG_INCLUDE_DIRS})
          set(CMAKE_REQUIRED_LIBRARIES ${DAG_LIBRARIES})
          check_function_exists(dag_attach_stream HAVE_DAG_STREAMS_API)
          if(NOT HAVE_DAG_STREAMS_API)
              message(FATAL_ERROR "DAG library lacks streams support")
          endif()
          check_function_exists(dag_attach_stream64 HAVE_DAG_LARGE_STREAMS_API)
          check_function_exists(dag_get_erf_types HAVE_DAG_GET_ERF_TYPES)
          check_function_exists(dag_get_stream_erf_types HAVE_DAG_GET_STREAM_ERF_TYPES)
          cmake_pop_check_state()
  
          include_directories(AFTER ${DAG_INCLUDE_DIRS})
          set(PROJECT_SOURCE_LIST_C ${PROJECT_SOURCE_LIST_C} pcap-dag.c)
          set(HAVE_DAG_API TRUE)
          set(PCAP_LINK_LIBRARIES ${PCAP_LINK_LIBRARIES} ${DAG_LIBRARIES})
  
          if(HAVE_DAG_LARGE_STREAMS_API)
              get_filename_component(DAG_LIBRARY_DIR ${DAG_LIBRARY} PATH)
              check_library_exists(vdag vdag_set_device_info ${DAG_LIBRARY_DIR} HAVE_DAG_VDAG)
              if(HAVE_DAG_VDAG)
                  set(PCAP_LINK_LIBRARIES ${PCAP_LINK_LIBRARIES} ${CMAKE_THREAD_LIBS_INIT})
              endif()
          endif()
      endif()
  endif()
  
  # Check for Septel card support.
  set(PROJECT_EXTERNAL_OBJECT_LIST "")
  if(NOT DISABLE_SEPTEL)
      #
      # Do we have the msg.h header?
      #
      set(SEPTEL_INCLUDE_DIRS "${SEPTEL_ROOT}/INC")
      cmake_push_check_state()
      set(CMAKE_REQUIRED_INCLUDES ${SEPTEL_INCLUDE_DIRS})
      check_include_file(msg.h HAVE_INC_MSG_H)
      cmake_pop_check_state()
      if(HAVE_INC_MSG_H)
          #
          # Yes.
          #
          include_directories(AFTER ${SEPTEL_INCLUDE_DIRS})
          set(PROJECT_SOURCE_LIST_C ${PROJECT_SOURCE_LIST_C} pcap-septel.c)
          set(PROJECT_EXTERNAL_OBJECT_LIST ${PROJECT_EXTERNAL_OBJECT_LIST} "${SEPTEL_ROOT}/asciibin.o ${SEPTEL_ROOT}/bit2byte.o ${SEPTEL_ROOT}/confirm.o ${SEPTEL_ROOT}/fmtmsg.o ${SEPTEL_ROOT}/gct_unix.o ${SEPTEL_ROOT}/hqueue.o ${SEPTEL_ROOT}/ident.o ${SEPTEL_ROOT}/mem.o ${SEPTEL_ROOT}/pack.o ${SEPTEL_ROOT}/parse.o ${SEPTEL_ROOT}/pool.o ${SEPTEL_ROOT}/sdlsig.o ${SEPTEL_ROOT}/strtonum.o ${SEPTEL_ROOT}/timer.o ${SEPTEL_ROOT}/trace.o")
          set(HAVE_SEPTEL_API TRUE)
      endif()
  endif()
  
  # Check for Myricom SNF support.
  if(NOT DISABLE_SNF)
      #
      # Try to find the SNF header file and library.
      #
      find_package(SNF)
  
      #
      # Did we succeed?
      #
      if(SNF_FOUND)
          #
          # Yes.
          #
          include_directories(AFTER ${SNF_INCLUDE_DIRS})
          set(PROJECT_SOURCE_LIST_C ${PROJECT_SOURCE_LIST_C} pcap-snf.c)
          set(HAVE_SNF_API TRUE)
          set(PCAP_LINK_LIBRARIES ${PCAP_LINK_LIBRARIES} ${SNF_LIBRARIES})
      endif()
  endif()
  
  # Check for Riverbed TurboCap support.
  if(NOT DISABLE_TC)
      #
      # Try to find the TurboCap header file and library.
      #
      find_package(TC)
  
      #
      # Did we succeed?
      #
      if(TC_FOUND)
          #
          # Yes.
          #
          include_directories(AFTER ${TC_INCLUDE_DIRS})
          set(PROJECT_SOURCE_LIST_C ${PROJECT_SOURCE_LIST_C} pcap-tc.c)
          set(HAVE_TC_API TRUE)
          set(PCAP_LINK_LIBRARIES "${PCAP_LINK_LIBRARIES} ${TC_LIBRARIES} ${CMAKE_USE_PTHREADS_INIT} stdc++")
      endif()
  endif()
  
  #
  # Remote capture support.
  #
  
  if(ENABLE_REMOTE)
      #
      # Check for various members of struct msghdr.
      # We need to include ftmacros.h on some platforms, to make sure we
      # get the POSIX/Single USER Specification version of struct msghdr,
      # which has those members, rather than the backwards-compatible
      # version, which doesn't.  That's not a system header file, and
      # at least some versions of CMake include it as <ftmacros.h>, which
      # won't check the current directory, so we add the top-level
      # source directory to the list of include directories when we do
      # the check.
      #
      cmake_push_check_state()
      set(CMAKE_REQUIRED_INCLUDES ${CMAKE_SOURCE_DIR})
      check_struct_has_member("struct msghdr" msg_control "ftmacros.h;sys/socket.h" HAVE_STRUCT_MSGHDR_MSG_CONTROL)
      check_struct_has_member("struct msghdr" msg_flags "ftmacros.h;sys/socket.h" HAVE_STRUCT_MSGHDR_MSG_FLAGS)
      cmake_pop_check_state()
      set(PROJECT_SOURCE_LIST_C ${PROJECT_SOURCE_LIST_C}
          pcap-new.c pcap-rpcap.c rpcap-protocol.c sockutils.c)
  endif(ENABLE_REMOTE)
  
  ###################################################################
  #   Warning options
  ###################################################################
  
  #
  # Check and add warning options if we have a .devel file.
  #
  if(EXISTS ${CMAKE_SOURCE_DIR}/.devel OR EXISTS ${CMAKE_BINARY_DIR}/.devel)
      #
      # Warning options.
      #
      if(MSVC AND NOT ${CMAKE_C_COMPILER} MATCHES "clang*")
          #
          # MSVC, with Microsoft's front end and code generator.
          # "MSVC" is also set for Microsoft's compiler with a Clang
          # front end and their code generator ("Clang/C2"), so we
          # check for clang.exe and treat that differently.
          #
          check_and_add_compiler_option(-Wall)
          #
          # Disable some pointless warnings that /Wall turns on.
          #
          # Unfortunately, MSVC does not appear to have an equivalent
          # to "__attribute__((unused))" to mark a particular function
          # parameter as being known to be unused, so that the compiler
          # won't warn about it (for example, the function might have
          # that parameter because a pointer to it is being used, and
          # the signature of that function includes that parameter).
          # C++ lets you give a parameter a type but no name, but C
          # doesn't have that.
          #
          check_and_add_compiler_option(-wd4100)
          #
          # In theory, we care whether somebody uses f() rather than
          # f(void) to declare a function with no arguments, but, in
          # practice, there are places in the Windows header files
          # that appear to do that, so we squelch that warning.
          #
          check_and_add_compiler_option(-wd4255)
          #
          # Windows FD_SET() generates this, so we suppress it.
          #
          check_and_add_compiler_option(-wd4548)
          #
          # Perhaps testing something #defined to be 0 with #ifdef is an
          # error, and it should be tested with #if, but perhaps it's
          # not, and Microsoft does that in its headers, so we squelch
          # that warning.
          #
          check_and_add_compiler_option(-wd4574)
          #
          # The Windows headers also test not-defined values in #if, so
          # we don't want warnings about that, either.
          #
          check_and_add_compiler_option(-wd4668)
          #
          # We do *not* care whether some function is, or isn't, going to be
          # expanded inline.
          #
          check_and_add_compiler_option(-wd4710)
          check_and_add_compiler_option(-wd4711)
          #
          # We do *not* care whether we're adding padding bytes after
          # structure members.
          #
          check_and_add_compiler_option(-wd4820)
      else()
          #
          # Other compilers, including MSVC with a Clang front end and
          # Microsoft's code generator.  We currently treat them as if
          # they might support GCC-style -W options.
          #
          check_and_add_compiler_option(-Wall)
          check_and_add_compiler_option(-Wsign-compare)
          check_and_add_compiler_option(-Wmissing-prototypes)
          check_and_add_compiler_option(-Wstrict-prototypes)
          check_and_add_compiler_option(-Wshadow)
          check_and_add_compiler_option(-Wdeclaration-after-statement)
          check_and_add_compiler_option(-Wused-but-marked-unused)
          check_and_add_compiler_option(-Wdocumentation)
          check_and_add_compiler_option(-Wcomma)
          check_and_add_compiler_option(-Wmissing-noreturn)
          # Warns about safeguards added in case the enums are extended
          # check_and_add_compiler_option(-Wcovered-switch-default)
          check_and_add_compiler_option(-Wmissing-variable-declarations)
          check_and_add_compiler_option(-Wunused-parameter)
          check_and_add_compiler_option(-Wformat-nonliteral)
          check_and_add_compiler_option(-Wunreachable-code)
      endif()
  endif()
  
  #
  # Suppress some warnings we get with MSVC even without /Wall.
  #
  if(MSVC AND NOT ${CMAKE_C_COMPILER} MATCHES "clang*")
      #
      # Yes, we have some functions that never return but that
      # have a non-void return type.  That's because, on some
      # platforms, they *do* return values but, on other
      # platforms, including Windows, they just fail and
      # longjmp out by calling bpf_error().
      #
      check_and_add_compiler_option(-wd4646)
  endif()
  
  file(GLOB PROJECT_SOURCE_LIST_H
      *.h
      pcap/*.h
  )
  
  #
  # Try to have the compiler default to hiding symbols, so that only
  # symbols explicitly exported with PCAP_API will be visible outside
  # (shared) libraries.
  #
  # Not necessary with MSVC, as that's the default.
  #
  # XXX - we don't use ADD_COMPILER_EXPORT_FLAGS, because, as of CMake
  # 2.8.12.2, it doesn't know about Sun C/Oracle Studio, and, as of
  # CMake 2.8.6, it only sets the C++ compiler flags, rather than
  # allowing an arbitrary variable to be set with the "hide symbols
  # not explicitly exported" flag.
  #
  if(NOT MSVC)
      if(CMAKE_C_COMPILER_ID MATCHES "SunPro")
          #
          # Sun C/Oracle Studio.
          #
          check_and_add_compiler_option(-xldscope=hidden)
      else()
          #
          # Try this for all other compilers; it's what GCC uses,
          # and a number of other compilers, such as Clang and Intel C,
          # use it as well.
          #
          check_and_add_compiler_option(-fvisibility=hidden)
      endif()
  endif(NOT MSVC)
  
  #
  # Flex/Lex and YACC/Berkeley YACC/Bison.
  # From a mail message to the CMake mailing list by Andy Cedilnik of
  # Kitware.
  #
  
  #
  # Try to find Flex, a Windows version of Flex, or Lex.
  #
  find_program(LEX_EXECUTABLE NAMES flex win_flex lex)
  if(LEX_EXECUTABLE STREQUAL "LEX_EXECUTABLE-NOTFOUND")
      message(FATAL_ERROR "Neither flex nor win_flex nor lex was found.")
  endif()
  message(STATUS "Lexical analyzer generator: ${LEX_EXECUTABLE}")
  
  add_custom_command(
      OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/scanner.c ${CMAKE_CURRENT_BINARY_DIR}/scanner.h
      SOURCE ${pcap_SOURCE_DIR}/scanner.l
      COMMAND ${LEX_EXECUTABLE} -P pcap_ --header-file=scanner.h --nounput -o${CMAKE_CURRENT_BINARY_DIR}/scanner.c ${pcap_SOURCE_DIR}/scanner.l
      DEPENDS ${pcap_SOURCE_DIR}/scanner.l
  )
  
  #
  # Since scanner.c does not exist yet when cmake is run, mark
  # it as generated.
  #
  # Since scanner.c includes grammar.h, mark that as a dependency.
  #
  set_source_files_properties(${CMAKE_CURRENT_BINARY_DIR}/scanner.c PROPERTIES
      GENERATED TRUE
      OBJECT_DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/grammar.h
  )
  
  #
  # Add scanner.c to the list of sources.
  #
  #set(PROJECT_SOURCE_LIST_C ${PROJECT_SOURCE_LIST_C} ${CMAKE_CURRENT_BINARY_DIR}/scanner.c)
  
  #
  # Try to find YACC or Bison.
  #
  find_program(YACC_EXECUTABLE NAMES bison win_bison byacc yacc)
  if(YACC_EXECUTABLE STREQUAL "YACC_EXECUTABLE-NOTFOUND")
      message(FATAL_ERROR "Neither bison nor win_bison nor byacc nor yacc was found.")
  endif()
  message(STATUS "Parser generator: ${YACC_EXECUTABLE}")
  
  #
  # Create custom command for the scanner.
  # Find out whether it's Bison or not by looking at the last component
  # of the path (without a .exe extension, if this is Windows).
  #
  get_filename_component(YACC_NAME ${YACC_EXECUTABLE} NAME_WE)
  if("${YACC_NAME}" STREQUAL "bison" OR "${YACC_NAME}" STREQUAL "win_bison")
      set(YACC_COMPATIBILITY_FLAG "-y")
  endif()
  add_custom_command(
      OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/grammar.c ${CMAKE_CURRENT_BINARY_DIR}/grammar.h
      SOURCE ${pcap_SOURCE_DIR}/grammar.y
      COMMAND ${YACC_EXECUTABLE} ${YACC_COMPATIBILITY_FLAG} -p pcap_ -o ${CMAKE_CURRENT_BINARY_DIR}/grammar.c -d ${pcap_SOURCE_DIR}/grammar.y
      DEPENDS ${pcap_SOURCE_DIR}/grammar.y
  )
  
  #
  # Since grammar.c does not exists yet when cmake is run, mark
  # it as generated.
  #
  set_source_files_properties(${CMAKE_CURRENT_BINARY_DIR}/grammar.c PROPERTIES
      GENERATED TRUE
      OBJECT_DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/scanner.h
  )
  
  #
  # Add grammar.c to the list of sources.
  #
  #set(PROJECT_SOURCE_LIST_C ${PROJECT_SOURCE_LIST_C} ${CMAKE_CURRENT_BINARY_DIR}/grammar.c)
  
  #
  # Assume, by default, no support for shared libraries and V7/BSD
  # convention for man pages (file formats in section 5, miscellaneous
  # info in section 7, administrative commands and daemons in section 8).
  # Individual cases can override this.
  #
  set(MAN_FILE_FORMATS 5)
  set(MAN_MISC_INFO 7)
  set(MAN_ADMIN_COMMANDS 8)
  if(CMAKE_SYSTEM_NAME STREQUAL "AIX")
      # Workaround to enable certain features
      set(_SUN TRUE)
      if(PCAP_TYPE STREQUAL "bpf")
          #
          # If we're using BPF, we need libodm and libcfg, as
          # we use them to load the BPF module.
          #
          set(PCAP_LINK_LIBRARIES ${PCAP_LINK_LIBRARIES} odm cfg)
      endif()
  elseif(CMAKE_SYSTEM_NAME STREQUAL "HP-UX")
      if(CMAKE_SYSTEM_VERSION MATCHES "[A-Z.]*9\.[0-9]*")
          #
          # HP-UX 9.x.
          #
          set(HAVE_HPUX9 TRUE)
      elseif(CMAKE_SYSTEM_VERSION MATCHES "[A-Z.]*10\.0")
          #
          # HP-UX 10.0.
          #
      elseif(CMAKE_SYSTEM_VERSION MATCHES "[A-Z.]*10\.1")
          #
          # HP-UX 10.1.
          #
      else()
          #
          # HP-UX 10.20 and later.
          #
          set(HAVE_HPUX10_20_OR_LATER TRUE)
      endif()
  
      #
      # Use System V conventions for man pages.
      #
      set(MAN_ADMIN_COMMANDS 1m)
      set(MAN_FILE_FORMATS 4)
      set(MAN_MISC_INFO 5)
  elseif(CMAKE_SYSTEM_NAME STREQUAL "IRIX" OR CMAKE_SYSTEM_NAME STREQUAL "IRIX64")
      #
      # Use IRIX conventions for man pages; they're the same as the
      # System V conventions, except that they use section 8 for
      # administrative commands and daemons.
      #
      set(MAN_FILE_FORMATS 4)
      set(MAN_MISC_INFO 5)
  elseif(CMAKE_SYSTEM_NAME STREQUAL "OSF1")
      #
      # DEC OSF/1, a/k/a Digial UNIX, a/k/a Tru64 UNIX.
      # Use Tru64 UNIX conventions for man pages; they're the same as the
      # System V conventions except that they use section 8 for
      # administrative commands and daemons.
      #
      set(MAN_FILE_FORMATS 4)
      set(MAN_MISC_INFO 5)
  elseif(CMAKE_SYSTEM_NAME STREQUAL "SunOS" AND CMAKE_SYSTEM_VERSION MATCHES "5[.][0-9.]*")
      #
      # SunOS 5.x.
      #
      set(HAVE_SOLARIS TRUE)
      #
      # Make sure errno is thread-safe, in case we're called in
      # a multithreaded program.  We don't guarantee that two
      # threads can use the *same* pcap_t safely, but the
      # current version does guarantee that you can use different
      # pcap_t's in different threads, and even that pcap_compile()
      # is thread-safe (it wasn't thread-safe in some older versions).
      #
      add_definitions(-D_TS_ERRNO)
  
      if(CMAKE_SYSTEM_VERSION STREQUAL "5.12")
      else()
          #
          # Use System V conventions for man pages.
          #
          set(MAN_ADMIN_COMMANDS 1m)
          set(MAN_FILE_FORMATS 4)
          set(MAN_MISC_INFO 5)
      endif()
  endif()
  
  source_group("Source Files" FILES ${PROJECT_SOURCE_LIST_C})
  source_group("Header Files" FILES ${PROJECT_SOURCE_LIST_H})
  
  if(WIN32)
      #
      # Add pcap-dll.rc to the list of sources.
      #
      set(PROJECT_SOURCE_LIST_C ${PROJECT_SOURCE_LIST_C} ${pcap_SOURCE_DIR}/pcap-dll.rc)
  endif(WIN32)
  
  #
  # Add subdirectories after we've set various variables, so they pick up
  # pick up those variables.
  #
  if(ENABLE_REMOTE)
      add_subdirectory(rpcapd)
  endif(ENABLE_REMOTE)
  add_subdirectory(testprogs)
  
  ######################################
  # Register targets
  ######################################
  
  #
  # Special target to serialize the building of the generated source.
  #
  # See
  #
  #  http://public.kitware.com/pipermail/cmake/2013-August/055510.html
  #
  add_custom_target(SerializeTarget
      DEPENDS
      ${CMAKE_CURRENT_BINARY_DIR}/grammar.c
      ${CMAKE_CURRENT_BINARY_DIR}/scanner.c
  )
  
  set_source_files_properties(${PROJECT_EXTERNAL_OBJECT_LIST} PROPERTIES
      EXTERNAL_OBJECT TRUE)
  
  if(BUILD_SHARED_LIBS)
      add_library(${LIBRARY_NAME} SHARED
          ${PROJECT_SOURCE_LIST_C}
          ${CMAKE_CURRENT_BINARY_DIR}/grammar.c
          ${CMAKE_CURRENT_BINARY_DIR}/scanner.c
          ${PROJECT_EXTERNAL_OBJECT_LIST}
      )
      add_dependencies(${LIBRARY_NAME} SerializeTarget)
      set_target_properties(${LIBRARY_NAME} PROPERTIES
          COMPILE_DEFINITIONS BUILDING_PCAP)
  endif(BUILD_SHARED_LIBS)
  
  add_library(${LIBRARY_NAME}_static STATIC
      ${PROJECT_SOURCE_LIST_C}
      ${CMAKE_CURRENT_BINARY_DIR}/grammar.c
      ${CMAKE_CURRENT_BINARY_DIR}/scanner.c
      ${PROJECT_EXTERNAL_OBJECT_LIST}
  )
  add_dependencies(${LIBRARY_NAME}_static SerializeTarget)
  set_target_properties(${LIBRARY_NAME}_static PROPERTIES
      COMPILE_DEFINITIONS BUILDING_PCAP)
  
  if(WIN32)
      if(BUILD_SHARED_LIBS)
          set_target_properties(${LIBRARY_NAME} PROPERTIES
              VERSION ${PACKAGE_VERSION_NOSUFFIX} # only MAJOR and MINOR are needed
          )
      endif(BUILD_SHARED_LIBS)
      if(MSVC)
          # XXX For DLLs, the TARGET_PDB_FILE generator expression can be used to locate
          # its PDB file's output directory for installation.
          # cmake doesn't offer a generator expression for PDB files generated by the
          # compiler (static libraries).
          # So instead of considering any possible output there is (there are many),
          # this will search for the PDB file in the compiler's initial output directory,
          # which is always ${CMAKE_CURRENT_BINARY_DIR}/CMakeFiles\wpcap_static.dir
          # regardless of architecture, build generator etc.
          # Quite hackish indeed.
          set(CMAKE_COMPILE_PDB_OUTPUT_DIRECTORY $<TARGET_FILE_DIR:${LIBRARY_NAME}_static>)
          set_target_properties(${LIBRARY_NAME}_static PROPERTIES
              COMPILE_PDB_NAME ${LIBRARY_NAME}_static
              OUTPUT_NAME "${LIBRARY_NAME}_static"
          )
      elseif(MINGW)
          #
          # For compatibility, build the shared library without the "lib" prefix on
          # MinGW as well.
          #
          set_target_properties(${LIBRARY_NAME} PROPERTIES
              PREFIX ""
              OUTPUT_NAME "${LIBRARY_NAME}"
          )
          set_target_properties(${LIBRARY_NAME}_static PROPERTIES
              OUTPUT_NAME "${LIBRARY_NAME}"
          )
      endif()
  else(WIN32) # UN*X
      if(BUILD_SHARED_LIBS)
          if(APPLE)
              set_target_properties(${LIBRARY_NAME} PROPERTIES
                  VERSION ${PACKAGE_VERSION}
                  SOVERSION A
              )
          else(APPLE)
              set_target_properties(${LIBRARY_NAME} PROPERTIES
                  VERSION ${PACKAGE_VERSION}
                  SOVERSION ${PACKAGE_VERSION_MAJOR}
              )
          endif(APPLE)
      endif(BUILD_SHARED_LIBS)
      set_target_properties(${LIBRARY_NAME}_static PROPERTIES
          OUTPUT_NAME "${LIBRARY_NAME}"
      )
  endif(WIN32)
  
  if(BUILD_SHARED_LIBS)
      if(NOT C_ADDITIONAL_FLAGS STREQUAL "")
          set_target_properties(${LIBRARY_NAME} PROPERTIES COMPILE_FLAGS ${C_ADDITIONAL_FLAGS})
      endif()
      target_link_libraries(${LIBRARY_NAME} ${PCAP_LINK_LIBRARIES})
  endif(BUILD_SHARED_LIBS)
  
  if(NOT C_ADDITIONAL_FLAGS STREQUAL "")
      set_target_properties(${LIBRARY_NAME}_static PROPERTIES COMPILE_FLAGS ${C_ADDITIONAL_FLAGS})
  endif()
  
  ######################################
  # Write out the config.h file
  ######################################
  
  configure_file(${CMAKE_CURRENT_SOURCE_DIR}/cmakeconfig.h.in ${CMAKE_CURRENT_BINARY_DIR}/config.h)
  
  ######################################
  # Install pcap library, include files, and man pages
  ######################################
  
  #
  # "Define GNU standard installation directories", which actually
  # are also defined, to some degree, by autotools, and at least
  # some of which are general UN*X conventions.
  #
  include(GNUInstallDirs)
  
  set(LIBRARY_NAME_STATIC ${LIBRARY_NAME}_static)
  
  function(install_manpage_symlink SOURCE TARGET MANDIR)
      if(MINGW)
          find_program(LINK_EXECUTABLE ln)
              if(LINK_EXECUTABLE)
                  set(LINK_COMMAND "\"${LINK_EXECUTABLE}\" \"-s\" \"${SOURCE}\" \"${TARGET}\"")
              else(LINK_EXECUTABLE)
                  message(FATAL_ERROR "ln (http://pubs.opengroup.org/onlinepubs/9699919799/utilities/ln.html) not found.")
              endif(LINK_EXECUTABLE)
      else(MINGW)
          set(LINK_COMMAND "\"${CMAKE_COMMAND}\" \"-E\" \"create_symlink\" \"${SOURCE}\" \"${TARGET}\"")
      endif(MINGW)
  
      install(CODE
          "message(STATUS \"Symlinking: ${CMAKE_INSTALL_PREFIX}/${MANDIR}/${SOURCE} to ${TARGET}\")
           execute_process(
              COMMAND \"${CMAKE_COMMAND}\" \"-E\" \"remove\" \"${TARGET}\"
              WORKING_DIRECTORY ${CMAKE_INSTALL_PREFIX}/${MANDIR}
            )
           execute_process(
              COMMAND ${LINK_COMMAND}
              WORKING_DIRECTORY ${CMAKE_INSTALL_PREFIX}/${MANDIR}
              RESULT_VARIABLE EXIT_STATUS
            )
            if(NOT EXIT_STATUS EQUAL 0)
                message(FATAL_ERROR \"Could not create symbolic link from ${CMAKE_INSTALL_PREFIX}/${MANDIR}/${SOURCE} to ${TARGET}\")
            endif()
            set(CMAKE_INSTALL_MANIFEST_FILES \${CMAKE_INSTALL_MANIFEST_FILES} ${CMAKE_INSTALL_PREFIX}/${MANDIR}/${TARGET})")
  endfunction(install_manpage_symlink)
  
  set(MAN1_NOEXPAND pcap-config.1)
  set(MAN3PCAP_EXPAND
      pcap.3pcap.in
      pcap_compile.3pcap.in
      pcap_datalink.3pcap.in
      pcap_dump_open.3pcap.in
      pcap_get_tstamp_precision.3pcap.in
      pcap_list_datalinks.3pcap.in
      pcap_list_tstamp_types.3pcap.in
      pcap_open_dead.3pcap.in
      pcap_open_offline.3pcap.in
      pcap_set_tstamp_precision.3pcap.in
      pcap_set_tstamp_type.3pcap.in
  )
  set(MAN3PCAP_NOEXPAND
      pcap_activate.3pcap
      pcap_breakloop.3pcap
      pcap_can_set_rfmon.3pcap
      pcap_close.3pcap
      pcap_create.3pcap
      pcap_datalink_name_to_val.3pcap
      pcap_datalink_val_to_name.3pcap
      pcap_dump.3pcap
      pcap_dump_close.3pcap
      pcap_dump_file.3pcap
      pcap_dump_flush.3pcap
      pcap_dump_ftell.3pcap
      pcap_file.3pcap
      pcap_fileno.3pcap
      pcap_findalldevs.3pcap
      pcap_freecode.3pcap
      pcap_get_required_select_timeout.3pcap
      pcap_get_selectable_fd.3pcap
      pcap_geterr.3pcap
      pcap_inject.3pcap
      pcap_is_swapped.3pcap
      pcap_lib_version.3pcap
      pcap_lookupdev.3pcap
      pcap_lookupnet.3pcap
      pcap_loop.3pcap
      pcap_major_version.3pcap
      pcap_next_ex.3pcap
      pcap_offline_filter.3pcap
      pcap_open_live.3pcap
      pcap_set_buffer_size.3pcap
      pcap_set_datalink.3pcap
      pcap_set_immediate_mode.3pcap
      pcap_set_promisc.3pcap
      pcap_set_protocol_linux.3pcap
      pcap_set_rfmon.3pcap
      pcap_set_snaplen.3pcap
      pcap_set_timeout.3pcap
      pcap_setdirection.3pcap
      pcap_setfilter.3pcap
      pcap_setnonblock.3pcap
      pcap_snapshot.3pcap
      pcap_stats.3pcap
      pcap_statustostr.3pcap
      pcap_strerror.3pcap
      pcap_tstamp_type_name_to_val.3pcap
      pcap_tstamp_type_val_to_name.3pcap
  )
  set(MANFILE_EXPAND pcap-savefile.manfile.in)
  set(MANMISC_EXPAND
      pcap-filter.manmisc.in
      pcap-linktype.manmisc.in
      pcap-tstamp.manmisc.in
  )
  
  if(NOT BUILD_SHARED_LIBS)
      unset(LIBRARY_NAME)
  endif(NOT BUILD_SHARED_LIBS)
  
  if(WIN32)
      if(MSVC AND CMAKE_SIZEOF_VOID_P EQUAL 8)
          #
          # Install 64-bit code built with MSVC in the amd64 subdirectories,
          # as that's where it expects it to be.
          #
          install(TARGETS ${LIBRARY_NAME} ${LIBRARY_NAME_STATIC}
                  RUNTIME DESTINATION bin/amd64
                  LIBRARY DESTINATION lib/amd64
                  ARCHIVE DESTINATION lib/amd64)
          if(NOT MINGW)
              install(FILES $<TARGET_FILE_DIR:${LIBRARY_NAME_STATIC}>/${LIBRARY_NAME_STATIC}.pdb
                      DESTINATION bin/amd64 OPTIONAL)
              if(BUILD_SHARED_LIBS)
                  install(FILES $<TARGET_PDB_FILE:${LIBRARY_NAME}>
                          DESTINATION bin/amd64 OPTIONAL)
              endif(BUILD_SHARED_LIBS)
          endif(NOT MINGW)
      else(MSVC AND CMAKE_SIZEOF_VOID_P EQUAL 8)
          #
          # Install 32-bit code, and 64-bit code not built with MSVC
          # in the top-level directories, as those are where they
          # expect it to be.
          #
          install(TARGETS ${LIBRARY_NAME} ${LIBRARY_NAME_STATIC}
                  RUNTIME DESTINATION bin
                  LIBRARY DESTINATION lib
                  ARCHIVE DESTINATION lib)
          if(NOT MINGW)
              install(FILES $<TARGET_FILE_DIR:${LIBRARY_NAME_STATIC}>/${LIBRARY_NAME_STATIC}.pdb
                      DESTINATION bin OPTIONAL)
              if(BUILD_SHARED_LIBS)
                  install(FILES $<TARGET_PDB_FILE:${LIBRARY_NAME}>
                          DESTINATION bin OPTIONAL)
              endif(BUILD_SHARED_LIBS)
          endif(NOT MINGW)
      endif(MSVC AND CMAKE_SIZEOF_VOID_P EQUAL 8)
  else(WIN32)
      install(TARGETS ${LIBRARY_NAME} ${LIBRARY_NAME_STATIC} DESTINATION lib)
  endif(WIN32)
  
  install(DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/pcap/ DESTINATION include/pcap)
  install(FILES ${CMAKE_CURRENT_SOURCE_DIR}/pcap.h DESTINATION include)
  install(FILES ${CMAKE_CURRENT_SOURCE_DIR}/pcap-bpf.h DESTINATION include)
  install(FILES ${CMAKE_CURRENT_SOURCE_DIR}/pcap-namedb.h DESTINATION include)
  
  # On UN*X, and on Windows when not using MSVC, generate libpcap.pc and
  # pcap-config and process man pages and arrange that they be installed.
  if(NOT MSVC)
      set(PACKAGE_NAME ${LIBRARY_NAME})
      set(prefix ${CMAKE_INSTALL_PREFIX})
      set(exec_prefix "\${prefix}")
      set(includedir "\${prefix}/include")
      set(libdir "\${exec_prefix}/lib")
      if(CMAKE_SYSTEM_NAME STREQUAL "FreeBSD" OR
         CMAKE_SYSTEM_NAME STREQUAL "NetBSD" OR
         CMAKE_SYSTEM_NAME STREQUAL "OpenBSD" OR
         CMAKE_SYSTEM_NAME STREQUAL "DragonFly BSD" OR
         CMAKE_SYSTEM_NAME STREQUAL "Linux" OR
         CMAKE_SYSTEM_NAME STREQUAL "OSF1")
          #
          # Platforms where the linker is the GNU linker
          # or accepts command-line arguments like
          # those the GNU linker accepts.
          #
          set(V_RPATH_OPT "-Wl,-rpath,")
      elseif(CMAKE_SYSTEM_NAME STREQUAL "SunOS" AND CMAKE_SYSTEM_VERSION MATCHES "5[.][0-9.]*")
          #
          # SunOS 5.x.
          #
          # XXX - this assumes GCC is using the Sun linker,
          # rather than the GNU linker.
          #
          set(V_RPATH_OPT "-Wl,-R,")
      else()
          #
          # No option needed to set the RPATH.
          #
          set(V_RPATH_OPT "")
      endif()
      set(LIBS "")
      foreach(LIB ${PCAP_LINK_LIBRARIES})
          set(LIBS "${LIBS} -l${LIB}")
      endforeach(LIB)
      configure_file(${CMAKE_SOURCE_DIR}/pcap-config.in ${CMAKE_CURRENT_BINARY_DIR}/pcap-config @ONLY)
      configure_file(${CMAKE_SOURCE_DIR}/libpcap.pc.in ${CMAKE_CURRENT_BINARY_DIR}/libpcap.pc @ONLY)
      install(PROGRAMS ${CMAKE_CURRENT_BINARY_DIR}/pcap-config DESTINATION bin)
      install(FILES ${CMAKE_CURRENT_BINARY_DIR}/libpcap.pc DESTINATION lib/pkgconfig)
  
      #
      # Man pages.
      #
      # For each section of the manual for which we have man pages
      # that require macro expansion, do the expansion.
      #
      set(MAN1 "")
      foreach(MANPAGE ${MAN1_NOEXPAND})
          set(MAN1 ${MAN1} ${CMAKE_SOURCE_DIR}/${MANPAGE})
      endforeach(MANPAGE)
      install(FILES ${MAN1} DESTINATION ${CMAKE_INSTALL_MANDIR}/man1)
  
      set(MAN3PCAP "")
      foreach(MANPAGE ${MAN3PCAP_NOEXPAND})
          set(MAN3PCAP ${MAN3PCAP} ${CMAKE_SOURCE_DIR}/${MANPAGE})
      endforeach(MANPAGE)
      foreach(TEMPLATE_MANPAGE ${MAN3PCAP_EXPAND})
          string(REPLACE ".in" "" MANPAGE ${TEMPLATE_MANPAGE})
          configure_file(${CMAKE_SOURCE_DIR}/${TEMPLATE_MANPAGE} ${CMAKE_CURRENT_BINARY_DIR}/${MANPAGE} @ONLY)
          set(MAN3PCAP ${MAN3PCAP} ${CMAKE_CURRENT_BINARY_DIR}/${MANPAGE})
      endforeach(TEMPLATE_MANPAGE)
      install(FILES ${MAN3PCAP} DESTINATION ${CMAKE_INSTALL_MANDIR}/man3)
      install_manpage_symlink(pcap_datalink_val_to_name.3pcap pcap_datalink_val_to_description.3pcap ${CMAKE_INSTALL_MANDIR}/man3)
      install_manpage_symlink(pcap_dump_open.3pcap pcap_dump_fopen.3pcap ${CMAKE_INSTALL_MANDIR}/man3)
      install_manpage_symlink(pcap_findalldevs.3pcap pcap_freealldevs.3pcap ${CMAKE_INSTALL_MANDIR}/man3)
      install_manpage_symlink(pcap_geterr.3pcap pcap_perror.3pcap ${CMAKE_INSTALL_MANDIR}/man3)
      install_manpage_symlink(pcap_inject.3pcap pcap_sendpacket.3pcap ${CMAKE_INSTALL_MANDIR}/man3)
      install_manpage_symlink(pcap_list_datalinks.3pcap pcap_free_datalinks.3pcap ${CMAKE_INSTALL_MANDIR}/man3)
      install_manpage_symlink(pcap_list_tstamp_types.3pcap pcap_free_tstamp_types.3pcap ${CMAKE_INSTALL_MANDIR}/man3)
      install_manpage_symlink(pcap_loop.3pcap pcap_dispatch.3pcap ${CMAKE_INSTALL_MANDIR}/man3)
      install_manpage_symlink(pcap_major_version.3pcap pcap_minor_version.3pcap ${CMAKE_INSTALL_MANDIR}/man3)
      install_manpage_symlink(pcap_next_ex.3pcap pcap_next.3pcap ${CMAKE_INSTALL_MANDIR}/man3)
      install_manpage_symlink(pcap_open_dead.3pcap pcap_open_dead_with_tstamp_precision.3pcap ${CMAKE_INSTALL_MANDIR}/man3)
      install_manpage_symlink(pcap_open_offline.3pcap pcap_open_offline_with_tstamp_precision.3pcap ${CMAKE_INSTALL_MANDIR}/man3)
      install_manpage_symlink(pcap_open_offline.3pcap pcap_fopen_offline.3pcap ${CMAKE_INSTALL_MANDIR}/man3)
      install_manpage_symlink(pcap_open_offline.3pcap pcap_fopen_offline_with_tstamp_precision.3pcap ${CMAKE_INSTALL_MANDIR}/man3)
      install_manpage_symlink(pcap_tstamp_type_val_to_name.3pcap pcap_tstamp_type_val_to_description.3pcap ${CMAKE_INSTALL_MANDIR}/man3)
      install_manpage_symlink(pcap_setnonblock.3pcap pcap_getnonblock.3pcap ${CMAKE_INSTALL_MANDIR}/man3)
  
      set(MANFILE "")
      foreach(TEMPLATE_MANPAGE ${MANFILE_EXPAND})
          string(REPLACE ".manfile.in" ".${MAN_FILE_FORMATS}" MANPAGE ${TEMPLATE_MANPAGE})
          configure_file(${CMAKE_SOURCE_DIR}/${TEMPLATE_MANPAGE} ${CMAKE_CURRENT_BINARY_DIR}/${MANPAGE} @ONLY)
          set(MANFILE ${MANFILE} ${CMAKE_CURRENT_BINARY_DIR}/${MANPAGE})
      endforeach(TEMPLATE_MANPAGE)
      install(FILES ${MANFILE} DESTINATION ${CMAKE_INSTALL_MANDIR}/man${MAN_FILE_FORMATS})
  
      set(MANMISC "")
      foreach(TEMPLATE_MANPAGE ${MANMISC_EXPAND})
          string(REPLACE ".manmisc.in" ".${MAN_MISC_INFO}" MANPAGE ${TEMPLATE_MANPAGE})
          configure_file(${CMAKE_SOURCE_DIR}/${TEMPLATE_MANPAGE} ${CMAKE_CURRENT_BINARY_DIR}/${MANPAGE} @ONLY)
          set(MANMISC ${MANMISC} ${CMAKE_CURRENT_BINARY_DIR}/${MANPAGE})
      endforeach(TEMPLATE_MANPAGE)
      install(FILES ${MANMISC} DESTINATION ${CMAKE_INSTALL_MANDIR}/man${MAN_MISC_INFO})
  endif(NOT MSVC)
  
  # uninstall target
  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)