#
# Try to find libpcap.
#
+# To tell this module where to look, a user may set the environment variable
+# PCAP_ROOT to point cmake to the *root* of a directory with include and
+# lib subdirectories for pcap.dll (e.g WpdPack or npcap-sdk).
+# Alternatively, PCAP_ROOT may also be set from cmake command line or GUI
+# (e.g cmake -DPCAP_ROOT=C:\path\to\pcap [...])
+#
if(WIN32)
#
#
# First, try pkg-config.
+ # Before doing so, set the PKG_CONFIG_PATH environment variable
+ # to include all the directories in CMAKE_PREFIX_PATH.
+ #
+ # *If* we were to require CMake 3.1 or later on UN*X,
+ # pkg_search_module() would do this for us, but, for now,
+ # we're not doing that, in case somebody's building with
+ # CMake on some "long-term support" version, predating
+ # CMake 3.1, of an OS that supplies an earlier
+ # version as a package.
+ #
+ # If we ever set a minimum of 3.1 or later on UN*X, we should
+ # remove the environment variable changes.
+ #
+ # This is based on code in the CMake 3.12.4 FindPkgConfig.cmake,
+ # which is "Distributed under the OSI-approved BSD 3-Clause License."
#
find_package(PkgConfig)
+
+ #
+ # Get the current PKG_CONFIG_PATH setting.
+ #
+ set(_pkg_config_path "$ENV{PKG_CONFIG_PATH}")
+
+ #
+ # Save it, so we can restore it after we run pkg-config.
+ #
+ set(_saved_pkg_config_path "${_pkg_config_path}")
+
+ if(NOT "${CMAKE_PREFIX_PATH}" STREQUAL "")
+ #
+ # Convert it to a CMake-style path, before we add additional
+ # values to it.
+ #
+ if(NOT "${_pkg_config_path}" STREQUAL "")
+ file(TO_CMAKE_PATH "${_pkg_config_path}" _pkg_config_path)
+ endif()
+
+ #
+ # Turn CMAKE_PREFIX_PATH into a list of extra paths to add
+ # to _pkg_config_path.
+ #
+ set(_extra_paths "")
+ list(APPEND _extra_paths ${CMAKE_PREFIX_PATH})
+
+ # Create a list of the possible pkgconfig subfolder (depending on
+ # the system
+ set(_lib_dirs)
+ if(NOT DEFINED CMAKE_SYSTEM_NAME
+ OR (CMAKE_SYSTEM_NAME MATCHES "^(Linux|kFreeBSD|GNU)$"
+ AND NOT CMAKE_CROSSCOMPILING))
+ if(EXISTS "/etc/debian_version") # is this a debian system ?
+ if(CMAKE_LIBRARY_ARCHITECTURE)
+ list(APPEND _lib_dirs "lib/${CMAKE_LIBRARY_ARCHITECTURE}/pkgconfig")
+ endif()
+ else()
+ # not debian, check the FIND_LIBRARY_USE_LIB32_PATHS and FIND_LIBRARY_USE_LIB64_PATHS properties
+ get_property(uselib32 GLOBAL PROPERTY FIND_LIBRARY_USE_LIB32_PATHS)
+ if(uselib32 AND CMAKE_SIZEOF_VOID_P EQUAL 4)
+ list(APPEND _lib_dirs "lib32/pkgconfig")
+ endif()
+ get_property(uselib64 GLOBAL PROPERTY FIND_LIBRARY_USE_LIB64_PATHS)
+ if(uselib64 AND CMAKE_SIZEOF_VOID_P EQUAL 8)
+ list(APPEND _lib_dirs "lib64/pkgconfig")
+ endif()
+ get_property(uselibx32 GLOBAL PROPERTY FIND_LIBRARY_USE_LIBX32_PATHS)
+ if(uselibx32 AND CMAKE_INTERNAL_PLATFORM_ABI STREQUAL "ELF X32")
+ list(APPEND _lib_dirs "libx32/pkgconfig")
+ endif()
+ endif()
+ endif()
+ if(CMAKE_SYSTEM_NAME STREQUAL "FreeBSD" AND NOT CMAKE_CROSSCOMPILING)
+ list(APPEND _lib_dirs "libdata/pkgconfig")
+ endif()
+ list(APPEND _lib_dirs "lib/pkgconfig")
+ list(APPEND _lib_dirs "share/pkgconfig")
+
+ # Check if directories exist and eventually append them to the
+ # pkgconfig path list
+ foreach(_prefix_dir ${_extra_paths})
+ foreach(_lib_dir ${_lib_dirs})
+ if(EXISTS "${_prefix_dir}/${_lib_dir}")
+ list(APPEND _pkg_config_path "${_prefix_dir}/${_lib_dir}")
+ list(REMOVE_DUPLICATES _pkg_config_path)
+ endif()
+ endforeach()
+ endforeach()
+
+ if(NOT "${_pkg_config_path}" STREQUAL "")
+ # remove empty values from the list
+ list(REMOVE_ITEM _pkg_config_path "")
+ file(TO_NATIVE_PATH "${_pkg_config_path}" _pkg_config_path)
+ if(UNIX)
+ string(REPLACE ";" ":" _pkg_config_path "${_pkg_config_path}")
+ string(REPLACE "\\ " " " _pkg_config_path "${_pkg_config_path}")
+ endif()
+ set(ENV{PKG_CONFIG_PATH} "${_pkg_config_path}")
+ endif()
+ endif()
pkg_search_module(CONFIG_PCAP ${_quiet} libpcap)
+ set(ENV{PKG_CONFIG_PATH} "${_saved_pkg_config_path}")
if(NOT CONFIG_PCAP_FOUND)
#
endif()
#
- # if this is macOS or some other Darwin-based OS, check whether
- # it's the system-supplied one.
+ # If this is a vendor-supplied pcap-config, which we define as
+ # being "a pcap-config in /usr/bin or /usr/ccs/bin" (the latter
+ # is for Solaris and Sun/Oracle Studio), there are some issues.
+ # Work around them.
#
- if(APPLE AND "${PCAP_CONFIG}" STREQUAL /usr/bin/pcap-config)
+ if("${PCAP_CONFIG}" STREQUAL /usr/bin/pcap-config OR
+ "${PCAP_CONFIG}" STREQUAL /usr/ccs/bin/pcap-config)
#
- # It is - remember that, so that if it provides -I/usr/local/include
- # with --cflags, or -L/usr/local/lib with --libs, we ignore it;
- # the macOS pcap-config does that even though the headers aren't
- # under /usr/local/include and the library isn't in /usr/local/lib.
+ # It's vendor-supplied.
#
- set(_broken_apple_pcap_config TRUE)
+ if(APPLE)
+ #
+ # This is macOS or another Darwin-based OS.
+ #
+ # That means that /usr/bin/pcap-config it may provide
+ # -I/usr/local/include with --cflags and -L/usr/local/lib
+ # with --libs; if there's no pcap installed under /usr/local,
+ # that will cause the build to fail, and if there is a pcap
+ # installed there, you'll get that pcap even if you don't
+ # want it. Remember that, so we ignore those values.
+ #
+ set(_broken_apple_pcap_config TRUE)
+ elseif(CMAKE_SYSTEM_NAME STREQUAL "SunOS" AND CMAKE_SYSTEM_VERSION MATCHES "5[.][0-9.]*")
+ #
+ # This is Solaris 2 or later, i.e. SunOS 5.x.
+ #
+ # At least on Solaris 11; there's /usr/bin/pcap-config, which
+ # reports -L/usr/lib with --libs, causing the 32-bit libraries
+ # to be found, and there's /usr/bin/{64bitarch}/pcap-config,
+ # where {64bitarch} is a name for the 64-bit version of the
+ # instruction set, which reports -L /usr/lib/{64bitarch},
+ # causing the 64-bit libraries to be found.
+ #
+ # So if we're building 64-bit targets, we replace PCAP_CONFIG
+ # with /usr/bin/{64bitarch}; we get {64bitarch} as the
+ # output of "isainfo -n".
+ #
+ if(CMAKE_SIZEOF_VOID_P EQUAL 8)
+ execute_process(COMMAND "isainfo" "-n"
+ RESULT_VARIABLE ISAINFO_RESULT
+ OUTPUT_VARIABLE ISAINFO_OUTPUT
+ OUTPUT_STRIP_TRAILING_WHITESPACE
+ )
+ if(ISAINFO_RESULT EQUAL 0)
+ #
+ # Success - change PCAP_CONFIG.
+ #
+ string(REPLACE "/bin/" "/bin/${ISAINFO_OUTPUT}/" PCAP_CONFIG "${PCAP_CONFIG}")
+ endif()
+ endif()
+ endif()
endif()
#
projects / tcpdump / blobdiff