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
|
AC_DEFUN([PDNS_WITH_EBPF],[
AC_MSG_CHECKING([if we have eBPF support])
AC_ARG_WITH([ebpf],
AS_HELP_STRING([--with-ebpf],[enable eBPF support @<:@default=auto@:>@]),
[with_ebpf=$withval],
[with_ebpf=auto],
)
AC_MSG_RESULT([$with_ebpf])
AS_IF([test "x$with_ebpf" != "xno"], [
AS_IF([test "x$with_ebpf" = "xyes" -o "x$with_ebpf" = "xauto"], [
AC_CHECK_HEADERS([linux/bpf.h], bpf_headers=yes, bpf_headers=no)
])
])
AS_IF([test "x$with_ebpf" = "xyes"], [
AS_IF([test x"$bpf_headers" = "no"], [
AC_MSG_ERROR([EBPF support requested but required eBPF headers were not found])
])
])
AM_CONDITIONAL([HAVE_EBPF], [test x"$bpf_headers" = "xyes" ])
AS_IF([test x"$bpf_headers" = "xyes" ],
[AC_CHECK_DECL(BPF_FUNC_tail_call,
[ AC_CHECK_DECL(SO_ATTACH_BPF,
[ AC_DEFINE([HAVE_EBPF], [1], [Define if using eBPF.]) ],
[ AS_IF([test "x$with_ebpf" = "xyes"], [
AC_MSG_ERROR([EBPF support requested but SO_ATTACH_BPF not found])
])],
[#include <sys/socket.h>
]
)],
[ AS_IF([test "x$with_ebpf" = "xyes"], [
AC_MSG_ERROR([EBPF support requested but BPF_FUNC_tail_call not found in the eBPF headers])
])],
[#include <linux/bpf.h>
]
)]
)
])
|
