net/net-snmp/patches/000-cross-compile.patch

   1 From: Jo-Philipp Wich <jo@mein.io>
   2 Date: Fri, 6 Jan 2017 13:41:00 +0100
   3 Subject: [PATCH] configure: allow overriding hardcoded /usr/include/libnl3
   4
   5 In a cross-compile setting we do not want to probe the host systems
   6 /usr/include path, therfore allow to disable this include path by passing
   7 ac_cv_header_netlink_netlink_h=yes to configure.
   8
   9 Also disable the testing for libraries providing nl_connect when
  10 netsnmp_cv_func_nl_connect_LIBS is predefined since the proprietary
  11 NETSNMP_SEARCH_LIBS() macro will clobber the internal link flags upon
  12 encountering predefined cache variables, causing all subsequent configure
  13 link tests to fail due to a stray "no" word getting passed to the linker.
  14
  15 Signed-off-by: Jo-Philipp Wich <jo@mein.io>
  16 --- a/configure.d/config_os_libs2
  17 +++ b/configure.d/config_os_libs2
  18 @@ -252,14 +252,22 @@ if test "x$with_nl" != "xno"; then
  19      case $target_os in
  20      linux*) # Check for libnl (linux)
  21          netsnmp_save_CPPFLAGS="$CPPFLAGS"
  22 -        CPPFLAGS="${LIBNL3_CFLAGS} ${LIBNLROUTE3_CFLAGS} $CPPFLAGS"
  23 -        NETSNMP_SEARCH_LIBS(nl_connect, nl-3,
  24 -            [AC_CHECK_HEADERS(netlink/netlink.h)
  25 -            EXTERNAL_MIBGROUP_INCLUDES="$EXTERNAL_MIBGROUP_INCLUDES ${LIBNL3_CFLAGS}"],
  26 -            [CPPFLAGS="$netsnmp_save_CPPFLAGS"], [], [LMIBLIBS])
  27 +        netsnmp_netlink_include_flags=""
  28          if test "x$ac_cv_header_netlink_netlink_h" != xyes; then
  29 -            NETSNMP_SEARCH_LIBS(nl_connect, nl, [
  30 -                AC_CHECK_HEADERS(netlink/netlink.h)], [], [], LMIBLIBS)
  31 +            netsnmp_netlink_include_flags="-I/usr/include/libnl3"
  32 +        fi
  33 +        CPPFLAGS="$netsnmp_netlink_include_flags $CPPFLAGS"
  34 +        if test "x$netsnmp_cv_func_nl_connect_LIBS" = x; then
  35 +            NETSNMP_SEARCH_LIBS(nl_connect, nl-3,
  36 +                [AC_CHECK_HEADERS(netlink/netlink.h)
  37 +                EXTERNAL_MIBGROUP_INCLUDES="$EXTERNAL_MIBGROUP_INCLUDES $netsnmp_netlink_include_flags"],
  38 +                [CPPFLAGS="$netsnmp_save_CPPFLAGS"], [], [], [LMIBLIBS])
  39 +            if test "x$ac_cv_header_netlink_netlink_h" != xyes; then
  40 +                NETSNMP_SEARCH_LIBS(nl_connect, nl, [
  41 +                    AC_CHECK_HEADERS(netlink/netlink.h)], [], [], LMIBLIBS)
  42 +            fi
  43 +        else
  44 +            LMIBLIBS="$LMIBLIBS $netsnmp_cv_func_nl_connect_LIBS"
  45          fi
  46          if test "x$ac_cv_header_netlink_netlink_h" = xyes; then
  47              AC_EGREP_HEADER([nl_socket_free], [netlink/socket.h],