forked from osmocom/wireshark
145 lines
3.6 KiB
CMake
145 lines
3.6 KiB
CMake
#
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# Find the native netlink includes and library
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#
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# If they exist, differentiate between versions 1, 2 and 3.
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# Version 1 does not have netlink/version.h
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# Version 2 started separating libraries (libnl{,-genl,-route}).
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# Version 3 (>= 3.2) started appending the major version number as suffix to
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# library names (libnl-3)
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#
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# NL_INCLUDE_DIRS - where to find libnl.h, etc.
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# NL_LIBRARIES - List of libraries when using libnl.
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# NL_FOUND - True if libnl found.
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if(NL_LIBRARIES AND NL_INCLUDE_DIRS)
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# in cache already
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SET(NL_FOUND TRUE)
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else()
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SET( SEARCHPATHS
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/opt/local
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/sw
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/usr
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/usr/local
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)
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find_package(PkgConfig)
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pkg_check_modules(NL3 libnl-3.0 libnl-genl-3.0 libnl-route-3.0)
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if(NOT NL3_FOUND)
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pkg_search_module(NL2 libnl-2.0)
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endif()
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# Try to find NL 2.0, 3.0 or 3.1 (/usr/include/netlink/version.h) or
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# NL >= 3.2 (/usr/include/libnl3/netlink/version.h)
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find_path(NL3_INCLUDE_DIR
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PATH_SUFFIXES
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include/libnl3
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include
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NAMES
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netlink/version.h
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HINTS
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"${NL3_libnl-3.0_INCLUDEDIR}"
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"${NL2_INCLUDEDIR}"
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PATHS
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$(SEARCHPATHS)
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)
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# NL version >= 2
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if(NL3_INCLUDE_DIR)
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find_library(NL3_LIBRARY
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NAMES
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nl-3 nl
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PATH_SUFFIXES
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lib64 lib
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HINTS
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"${NL3_libnl-3.0_LIBDIR}"
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"${NL2_LIBDIR}"
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PATHS
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$(SEARCHPATHS)
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)
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find_library(NLGENL_LIBRARY
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NAMES
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nl-genl-3 nl-genl
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PATH_SUFFIXES
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lib64 lib
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HINTS
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"${NL3_libnl-genl-3.0_LIBDIR}"
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"${NL2_LIBDIR}"
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PATHS
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$(SEARCHPATHS)
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)
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find_library(NLROUTE_LIBRARY
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NAMES
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nl-route-3 nl-route
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PATH_SUFFIXES
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lib64 lib
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HINTS
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"${NL3_libnl-route-3.0_LIBDIR}"
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"${NL2_LIBDIR}"
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PATHS
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$(SEARCHPATHS)
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)
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#
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# If we don't have all of those libraries, we can't use libnl.
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#
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if(NL3_LIBRARY AND NLGENL_LIBRARY AND NLROUTE_LIBRARY)
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set(NL_LIBRARY ${NL3_LIBRARY})
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if(NL3_INCLUDE_DIR)
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# NL2 and NL3 are similar and just affect how the version is reported in
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# the --version output. In cast of doubt, assume NL3 since a library
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# without version number could be any of 2.0, 3.0 or 3.1.
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if(NOT NL3_FOUND AND NL2_FOUND)
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set(HAVE_LIBNL2 1)
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else()
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set(HAVE_LIBNL3 1)
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endif()
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endif()
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endif()
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set(NL_INCLUDE_DIR ${NL3_INCLUDE_DIR})
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endif()
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# libnl-2 and libnl-3 not found, try NL version 1
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if(NOT (NL_LIBRARY AND NL_INCLUDE_DIR))
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pkg_search_module(NL1 libnl-1)
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find_path(NL1_INCLUDE_DIR
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NAMES
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netlink/netlink.h
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HINTS
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"${NL1_INCLUDEDIR}"
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PATHS
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$(SEARCHPATHS)
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)
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find_library(NL1_LIBRARY
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NAMES
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nl
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PATH_SUFFIXES
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lib64 lib
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HINTS
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"${NL1_LIBDIR}"
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PATHS
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$(SEARCHPATHS)
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)
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set(NL_LIBRARY ${NL1_LIBRARY})
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set(NL_INCLUDE_DIR ${NL1_INCLUDE_DIR})
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if(NL1_LIBRARY AND NL1_INCLUDE_DIR)
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set(HAVE_LIBNL1 1)
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endif()
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endif()
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endif()
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# MESSAGE(STATUS "LIB Found: ${NL_LIBRARY}, Suffix: ${NLSUFFIX}\n 1:${HAVE_LIBNL1}, 2:${HAVE_LIBNL2}, 3:${HAVE_LIBNL3}.")
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# handle the QUIETLY and REQUIRED arguments and set NL_FOUND to TRUE if
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# all listed variables are TRUE
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INCLUDE(FindPackageHandleStandardArgs)
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FIND_PACKAGE_HANDLE_STANDARD_ARGS(NL DEFAULT_MSG NL_LIBRARY NL_INCLUDE_DIR)
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IF(NL_FOUND)
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set(NL_LIBRARIES ${NLGENL_LIBRARY} ${NLROUTE_LIBRARY} ${NL_LIBRARY})
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set(NL_INCLUDE_DIRS ${NL_INCLUDE_DIR})
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set(HAVE_LIBNL 1)
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else()
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set(NL_LIBRARIES )
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set(NL_INCLUDE_DIRS)
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endif()
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MARK_AS_ADVANCED( NL_LIBRARIES NL_INCLUDE_DIRS )
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