acinclude.m4

    ])
    #
    if test "$cares_cv_getservbyport_r_nargs" = "unknown"; then
      AC_COMPILE_IFELSE([
        AC_LANG_PROGRAM([[
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_NETDB_H
#include <netdb.h>
#endif
        ]],[[
          int p1, p5;
          char *p2, p4[4096];
          struct servent *p3;
          getservbyport_r(p1, p2, p3, p4, p5);
        ]])
      ],[
        cares_cv_getservbyport_r_nargs="5"
      ])
    fi
    #
    if test "$cares_cv_getservbyport_r_nargs" = "unknown"; then
      AC_COMPILE_IFELSE([
        AC_LANG_PROGRAM([[
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_NETDB_H
#include <netdb.h>
#endif
        ]],[[
          int p1;
          char *p2;
          struct servent *p3;
          struct servent_data p4;
          getservbyport_r(p1, p2, p3, &p4);
        ]])
      ],[
        cares_cv_getservbyport_r_nargs="4"
      ])
    fi
    #
    AC_MSG_RESULT([$cares_cv_getservbyport_r_nargs])
    #
    if test "$cares_cv_getservbyport_r_nargs" = "unknown"; then
      AC_MSG_WARN([HAVE_GETSERVBYPORT_R will not be defined])
    else
      AC_DEFINE(HAVE_GETSERVBYPORT_R, 1,
        [Specifies whether getservbyport_r is present])
      AC_DEFINE_UNQUOTED(GETSERVBYPORT_R_ARGS, $cares_cv_getservbyport_r_nargs,
        [Specifies the number of arguments to getservbyport_r])
      if test "$cares_cv_getservbyport_r_nargs" = "4" ; then
        AC_DEFINE(GETSERVBYPORT_R_BUFSIZE, sizeof(struct servent_data),
          [Specifies the size of the buffer to pass to getservbyport_r])
      else
        AC_DEFINE(GETSERVBYPORT_R_BUFSIZE, 4096,
          [Specifies the size of the buffer to pass to getservbyport_r])
      fi
    fi
    #
  fi
])