1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
|
AC_DEFUN([NM_LIBNL_CHECK], [
AC_MSG_CHECKING([for libnl address caching bug])
save_CFLAGS="$CFLAGS"
save_LDFLAGS="$LDFLAGS"
CFLAGS="$CFLAGS $LIBNL_CFLAGS"
LDFLAGS="$LDFLAGS $LIBNL_LIBS"
AC_RUN_IFELSE([AC_LANG_PROGRAM([[
#include <stdio.h>
#include <netlink/route/addr.h>
#include <netlink/object-api.h>
]],
[[
struct nl_handle *nlh;
struct nl_cache *cache;
struct nl_object *obj;
nlh = nl_handle_alloc ();
if (nl_connect (nlh, NETLINK_ROUTE) < 0) {
fprintf (stderr, "couldn't connect to netlink: %s", nl_geterror ());
return 3;
}
cache = rtnl_addr_alloc_cache (nlh);
if (!cache || nl_cache_nitems (cache) == 0) {
fprintf (stderr, "couldn't fill address cache: %s", nl_geterror ());
return 3;
}
obj = nl_cache_get_first (cache);
if (nl_object_identical (obj, obj))
return 0;
nl_cache_get_ops (cache)->co_obj_ops->oo_id_attrs &= ~0x80;
if (nl_object_identical (obj, obj))
return 1;
else
return 2;
]])], libnl_bug=$?, libnl_bug=$?, libnl_bug=cross)
CFLAGS="$save_CFLAGS"
LDFLAGS="$save_LDFLAGS"
case $libnl_bug in
0) AC_MSG_RESULT([no])
;;
1) AC_MSG_RESULT([yes, using workaround])
AC_DEFINE(LIBNL_NEEDS_ADDR_CACHING_WORKAROUND, 1, [Define this to hack around buggy libnl rtnl_addr caching])
;;
2) AC_MSG_RESULT([yes, and workaround doesn't work])
AC_MSG_ERROR([Installed libnl has broken address caching; please patch or upgrade])
;;
cross) AC_MSG_RESULT([cross-compiling... assuming it works!])
;;
*) AC_MSG_RESULT([?])
AC_MSG_ERROR([libnl test program failed])
;;
esac
])
|
