2 dnl Copyright (C) 2006-2020 Free Software Foundation, Inc.
3 dnl This file is free software; the Free Software Foundation
4 dnl gives unlimited permission to copy and/or distribute it,
5 dnl with or without modifications, as long as this notice is preserved.
7 AC_DEFUN([gl_HEADER_NET_IF],
9 AC_CACHE_CHECK([whether <net/if.h> is self-contained],
10 [gl_cv_header_net_if_h_selfcontained],
12 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <net/if.h>]],
13 [[struct if_nameindex ni;]])],
14 [gl_cv_header_net_if_h_selfcontained=yes],
15 [gl_cv_header_net_if_h_selfcontained=no])
17 if test $gl_cv_header_net_if_h_selfcontained = yes; then
21 AC_CHECK_HEADERS([net/if.h], [], [], [[#include <sys/socket.h>]])
22 gl_NEXT_HEADERS([net/if.h])
23 if test $ac_cv_header_net_if_h = yes; then
28 AC_SUBST([HAVE_NET_IF_H])
31 AM_CONDITIONAL([GL_GENERATE_NET_IF_H], [test -n "$NET_IF_H"])