ac_raf_func_which_getservbyname_r

Provides a test to determine the correct way to call getservbyname_r:

 - defines HAVE_FUNC_GETSERVBYNAME_R_6 if it needs 6 arguments (e.g linux)
 - defines HAVE_FUNC_GETSERVBYNAME_R_5 if it needs 5 arguments (e.g. solaris)
 - defines HAVE_FUNC_GETSERVBYNAME_R_4 if it needs 4 arguments (e.g. osf/1)

An example use can be found at http://raf.org/autoconf/net_getservbyname.c

Based on Caolan McNamara's gethostbyname_r macro. Based on David Arnold's autoconf suggestion in the threads faq.

AC_DEFUN([AC_raf_FUNC_WHICH_GETSERVBYNAME_R],
[AC_CACHE_CHECK(for getservbyname_r, ac_cv_func_which_getservbyname_r, [
AC_CHECK_FUNC(getservbyname_r, [
        AC_TRY_COMPILE([
#               include <netdb.h>
        ],      [

        char *name;
        char *proto;
        struct servent *se;
        struct servent_data data;
        (void) getservbyname_r(name, proto, se, &data);

                ],ac_cv_func_which_getservbyname_r=four,
                        [
  AC_TRY_COMPILE([
#   include <netdb.h>
  ], [
        char *name;
        char *proto;
        struct servent *se, *res;
        char buffer[2048];
        int buflen = 2048;
        (void) getservbyname_r(name, proto, se, buffer, buflen, &res)
  ],ac_cv_func_which_getservbyname_r=six,

  [
  AC_TRY_COMPILE([
#   include <netdb.h>
  ], [
        char *name;
        char *proto;
        struct servent *se;
        char buffer[2048];
        int buflen = 2048;
        (void) getservbyname_r(name, proto, se, buffer, buflen)
  ],ac_cv_func_which_getservbyname_r=five,ac_cv_func_which_getservbyname_r=no)

  ]

  )
                        ]
                )]
        ,ac_cv_func_which_getservbyname_r=no)])

if test $ac_cv_func_which_getservbyname_r = six; then
  AC_DEFINE(HAVE_FUNC_GETSERVBYNAME_R_6)
elif test $ac_cv_func_which_getservbyname_r = five; then
  AC_DEFINE(HAVE_FUNC_GETSERVBYNAME_R_5)
elif test $ac_cv_func_which_getservbyname_r = four; then
  AC_DEFINE(HAVE_FUNC_GETSERVBYNAME_R_4)

fi

])

Copyright © 2001 raf <raf@raf.org>

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