git.pond.sub.org Git - empserver/blob - m4/my_working_in6_is_addr_v4mapped.m4

   1 AC_DEFUN([MY_WORKING_IN6_IS_ADDR_V4MAPPED], [
   2     AC_CACHE_CHECK([whether IN6_IS_ADDR_V4MAPPED works],
   3                    my_cv_func_in6_is_addr_v4mapped, [
   4         AC_COMPILE_IFELSE(
   5             [AC_LANG_SOURCE([[#include <netinet/in.h>
   6 int foo(struct sockaddr_in6 *sap6)
   7 {
   8     return IN6_IS_ADDR_V4MAPPED(&sap6->sin6_addr);
   9 }]])],
  10             [my_cv_func_in6_is_addr_v4mapped=yes],
  11             [my_cv_func_in6_is_addr_v4mapped=no])])
  12     AC_CHECK_MEMBERS([struct sockaddr_in6.sin6_addr.s6_addr],
  13                      [my_member_sockaddr_in6_sin6_addr_s6_addr=yes],
  14                      [my_member_sockaddr_in6_sin6_addr_s6_addr=no],
  15                      [[#include <netinet/in.h>]])
  16     if test "x$my_cv_func_in6_is_addr_v4mapped$my_member_sockaddr_in6_sin6_addr_s6_addr" = xyesyes; then
  17         AC_DEFINE([HAVE_WORKING_IN6_IS_ADDR_V4MAPPED], [1],
  18                   [Define if you have a working IN6_IS_ADDR_V4MAPPED()])
  19     fi
  20 ])