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[babeltrace.git] / m4 / ax_lib_socket_nsl.m4
1 # ===========================================================================
2 # http://www.gnu.org/software/autoconf-archive/ax_lib_socket_nsl.html
3 # ===========================================================================
4 #
5 # SYNOPSIS
6 #
7 # AX_LIB_SOCKET_NSL
8 #
9 # DESCRIPTION
10 #
11 # This macro figures out what libraries are required on this platform to
12 # link sockets programs.
13 #
14 # The common cases are not to need any extra libraries, or to need
15 # -lsocket and -lnsl. We need to avoid linking with libnsl unless we need
16 # it, though, since on some OSes where it isn't necessary it will totally
17 # break networking. Unisys also includes gethostbyname() in libsocket but
18 # needs libnsl for socket().
19 #
20 # LICENSE
21 #
22 # Copyright (c) 2008 Russ Allbery <rra@stanford.edu>
23 # Copyright (c) 2008 Stepan Kasal <kasal@ucw.cz>
24 # Copyright (c) 2008 Warren Young <warren@etr-usa.com>
25 #
26 # Copying and distribution of this file, with or without modification, are
27 # permitted in any medium without royalty provided the copyright notice
28 # and this notice are preserved. This file is offered as-is, without any
29 # warranty.
30
31 #serial 6
32
33 AU_ALIAS([LIB_SOCKET_NSL], [AX_LIB_SOCKET_NSL])
34 AC_DEFUN([AX_LIB_SOCKET_NSL],
35 [
36 AC_SEARCH_LIBS([gethostbyname], [nsl])
37 AC_SEARCH_LIBS([socket], [socket], [], [
38 AC_CHECK_LIB([socket], [socket], [LIBS="-lsocket -lnsl $LIBS"],
39 [], [-lnsl])])
40 ])
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