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#
# Find the native netlink includes and library
#
# If they exist, differentiate between versions 1, 2 and 3.
# Version 1 does not have netlink/version.h
# Version 3 does have the major version number as a suffix
# to the libnl name (libnl-3)
#
# NL_INCLUDE_DIRS - where to find libnl.h, etc.
# NL_LIBRARIES - List of libraries when using libnl3.
# NL_FOUND - True if libnl found.
IF (NL_LIBRARIES AND NL_INCLUDE_DIRS )
# in cache already
SET(NL_FOUND TRUE)
ELSE (NL_LIBRARIES AND NL_INCLUDE_DIRS )
SET( SEARCHPATHS
/opt/local
/sw
/usr
/usr/local
)
find_package(PkgConfig)
pkg_check_modules(NL3 libnl-3.0 libnl-genl-3.0 libnl-route-3.0)
pkg_search_module(NL2 libnl-2.0)
FIND_PATH( NL_INCLUDE_DIR
PATH_SUFFIXES
include/libnl3
NAMES
netlink/version.h
HINTS
"${NL3_libnl-3.0_INCLUDEDIR}"
"${NL2_INCLUDEDIR}"
PATHS
$(SEARCHPATHS)
)
# NL version >= 2
IF ( NL_INCLUDE_DIR )
FIND_LIBRARY( NL_LIBRARY
NAMES
nl-3 nl
PATH_SUFFIXES
lib64 lib
HINTS
"${NL3_libnl-3.0_LIBDIR}"
"${NL2_LIBDIR}"
PATHS
$(SEARCHPATHS)
)
FIND_LIBRARY( NLGENL_LIBRARY
NAMES
nl-genl-3 nl-genl
PATH_SUFFIXES
lib64 lib
HINTS
"${NL3_libnl-genl-3.0_LIBDIR}"
"${NL2_LIBDIR}"
PATHS
$(SEARCHPATHS)
)
FIND_LIBRARY( NLROUTE_LIBRARY
NAMES
nl-route-3 nl-route
PATH_SUFFIXES
lib64 lib
HINTS
"${NL3_libnl-route-3.0_LIBDIR}"
"${NL2_LIBDIR}"
PATHS
$(SEARCHPATHS)
)
#
# If we don't have all of those libraries, we can't use libnl.
#
IF ( NOT NLGENL_LIBRARY AND NOT NLROUTE_LIBRARY )
SET( NL_LIBRARY NOTFOUND )
ENDIF ( NOT NLGENL_LIBRARY AND NOT NLROUTE_LIBRARY )
IF( NL_LIBRARY )
STRING(REGEX REPLACE ".*nl-([^.,;]*).*" "\\1" NLSUFFIX ${NL_LIBRARY})
IF ( NLSUFFIX )
SET( HAVE_LIBNL3 1 )
ELSE ( NLSUFFIX )
SET( HAVE_LIBNL2 1 )
ENDIF (NLSUFFIX )
SET( HAVE_LIBNL 1 )
ENDIF( NL_LIBRARY )
ELSE( NL_INCLUDE_DIR )
# NL version 1 ?
pkg_search_module(NL1 libnl-1)
FIND_PATH( NL_INCLUDE_DIR
NAMES
netlink/netlink.h
HINTS
"${NL1_INCLUDEDIR}"
PATHS
$(SEARCHPATHS)
)
FIND_LIBRARY( NL_LIBRARY
NAMES
nl
PATH_SUFFIXES
lib64 lib
HINTS
"${NL1_LIBDIR}"
PATHS
$(SEARCHPATHS)
)
if ( NL_INCLUDE_DIR )
SET( HAVE_LIBNL1 1 )
ENDIF ( NL_INCLUDE_DIR )
ENDIF( NL_INCLUDE_DIR )
ENDIF(NL_LIBRARIES AND NL_INCLUDE_DIRS)
# MESSAGE(STATUS "LIB Found: ${NL_LIBRARY}, Suffix: ${NLSUFFIX}\n 1:${HAVE_LIBNL1}, 2:${HAVE_LIBNL2}, 3:${HAVE_LIBNL3}.")
# handle the QUIETLY and REQUIRED arguments and set NL_FOUND to TRUE if
# all listed variables are TRUE
INCLUDE(FindPackageHandleStandardArgs)
FIND_PACKAGE_HANDLE_STANDARD_ARGS(NL DEFAULT_MSG NL_LIBRARY NL_INCLUDE_DIR)
IF(NL_FOUND)
SET( NL_LIBRARIES ${NLGENL_LIBRARY} ${NLROUTE_LIBRARY} ${NL_LIBRARY} )
SET( NL_INCLUDE_DIRS ${NL_INCLUDE_DIR})
ELSE()
SET( NL_LIBRARIES )
SET( NL_INCLUDE_DIRS )
ENDIF()
MARK_AS_ADVANCED( NL_LIBRARIES NL_INCLUDE_DIRS )
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