Don't interfere with a program's definition of __attribute__. * lib/argp.h (__attribute__): Remove definition. (_GL_ATTRIBUTE_FORMAT): New macro. (argp_error, __argp_error, argp_failure, __argp_failure): Use it. * lib/argp-fmtstream.h (__attribute__): Remove definition. (_GL_ATTRIBUTE_FORMAT): New macro. (__argp_fmtstream_printf, argp_fmtstream_printf): Use it. * lib/argp-help.c (hol_entry_long_iterate): Use __attribute__ only for GCC 3 or newer. * lib/error.h (__attribute__): Remove definition. (_GL_ATTRIBUTE_FORMAT): New macro. (error, error_at_line): Use it. * lib/hash.h (__attribute__): Remove definition. (ATTRIBUTE_WUR): Update definition. Define always. * lib/openat.h (__attribute__): Remove definition. (ATTRIBUTE_NORETURN): Update definition. Define always. * lib/sigpipe-die.h (__attribute__): Remove definition. (ATTRIBUTE_NORETURN): Update definition. Define always. * lib/vasnprintf.h (__attribute__): Remove definition. (_GL_ATTRIBUTE_FORMAT): New macro. (asnprintf, vasnprintf): Use it. * lib/xalloc.h (__attribute__): Remove definition. (ATTRIBUTE_NORETURN): Update definition. Define always. (ATTRIBUTE_MALLOC, ATTRIBUTE_ALLOC_SIZE): Define always. * lib/xmemdup0.h (__attribute__): Remove definition. (ATTRIBUTE_NORETURN): Update definition. Define always. * lib/xprintf.h (__attribute__): Remove definition. (_GL_ATTRIBUTE_FORMAT): New macro. (xprintf, xvprintf, xfprintf, xvfprintf): Use it. * lib/xstrtol.h (__attribute__): Remove definition. (ATTRIBUTE_NORETURN): Update definition. Define always. * lib/xvasprintf.h (__attribute__): Remove definition. (_GL_ATTRIBUTE_FORMAT): New macro. (xasprintf, xvasprintf): Use it. * tests/test-argmatch.c (__attribute__): Remove definition. (ATTRIBUTE_NORETURN): Update definition. Define always. * tests/test-exclude.c (__attribute__): Remove definition. (ATTRIBUTE_NORETURN): Update definition. Define always. Reported by Paul Eggert.

/*
 * Copyright (C) 2008-2011 Free Software Foundation, Inc.
 * Written by Simon Josefsson.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

#include <config.h>

/* Get gethostname() declaration.  */
#include <unistd.h>

#include "signature.h"
SIGNATURE_CHECK (gethostname, int, (char *, size_t));

/* Get HOST_NAME_MAX definition.  */
#include <limits.h>

#include <stdio.h>
#include <string.h>
#include <errno.h>

#define NOHOSTNAME "magic-gnulib-test-string"

int
main (int argc, char *argv[] _GL_UNUSED)
{
  char buf[HOST_NAME_MAX];
  int rc;

  if (strlen (NOHOSTNAME) >= HOST_NAME_MAX)
    {
      printf ("HOST_NAME_MAX impossibly small?! %d\n", HOST_NAME_MAX);
      return 2;
    }

  strcpy (buf, NOHOSTNAME);

  rc = gethostname (buf, sizeof (buf));

  if (rc != 0)
    {
      printf ("gethostname failed, rc %d errno %d\n", rc, errno);
      return 1;
    }

  if (strcmp (buf, NOHOSTNAME) == 0)
    {
      printf ("gethostname left buffer untouched.\n");
      return 1;
    }

  if (argc > 1)
    printf ("hostname: %s\n", buf);

  return 0;
}