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dnl A macro to check the availability and version of libnetlink
AC_DEFUN([AM_CHECK_LIBNL],
[
PKG_CHECK_MODULES(libnl, libnl-1 >= 1.1,[
HAVE_LIBNL=1
AC_SUBST(HAVE_LIBNL)
AC_DEFINE_UNQUOTED(HAVE_LIBNL, 1, [Build with libnetlink support])
AC_CHECK_HEADERS(netlink.h)
AC_CHECK_LIB(nl, nl_connect, [ LIBNL_LIBS="-lnl" ], [AC_MSG_ERROR([libnl is required])])
dnl Check if this particular version of libnl supports particular functions
AC_CHECK_LIB([nl],
[nl_socket_add_membership],
[AC_DEFINE([HAVE_NL_SOCKET_ADD_MEMBERSHIP], 1, [Does libnl have nl_socket_add_membership?])
],
)
AC_CHECK_LIB([nl],
[nl_socket_modify_cb],
[AC_DEFINE([HAVE_NL_SOCKET_MODIFY_CB], 1, [Does libnl have nl_socket_modify_cb?])
],
)
AC_CHECK_LIB([nl],
[nl_set_passcred],
[AC_DEFINE([HAVE_NL_SET_PASSCRED], 1, [Does libnl have nl_set_passcred?])
],
)
],[AC_MSG_WARN([Netlink support unavailable or too old])])
AC_SUBST(LIBNL_CFLAGS)
AC_SUBST(LIBNL_LIBS)
])
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