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# net_if_h.m4 serial 2
dnl Copyright (C) 2006-2023 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
AC_DEFUN([gl_HEADER_NET_IF],
[
AC_CACHE_CHECK([whether <net/if.h> is self-contained],
[gl_cv_header_net_if_h_selfcontained],
[
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <net/if.h>]],
[[struct if_nameindex ni;]])],
[gl_cv_header_net_if_h_selfcontained=yes],
[gl_cv_header_net_if_h_selfcontained=no])
])
if test $gl_cv_header_net_if_h_selfcontained = yes; then
GL_GENERATE_NET_IF_H=false
else
GL_GENERATE_NET_IF_H=true
AC_CHECK_HEADERS([net/if.h], [], [], [[#include <sys/socket.h>]])
gl_NEXT_HEADERS([net/if.h])
if test $ac_cv_header_net_if_h = yes; then
HAVE_NET_IF_H=1
else
HAVE_NET_IF_H=0
fi
AC_SUBST([HAVE_NET_IF_H])
fi
])
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