1# printf-posix.m4 serial 2 (gettext-0.13.1)
2dnl Copyright (C) 2003 Free Software Foundation, Inc.
3dnl This file is free software, distributed under the terms of the GNU
4dnl General Public License.  As a special exception to the GNU General
5dnl Public License, this file may be distributed as part of a program
6dnl that contains a configuration script generated by Autoconf, under
7dnl the same distribution terms as the rest of that program.
8
9dnl From Bruno Haible.
10dnl Test whether the printf() function supports POSIX/XSI format strings with
11dnl positions.
12
13AC_DEFUN([gt_PRINTF_POSIX],
14[
15  AC_REQUIRE([AC_PROG_CC])
16  AC_CACHE_CHECK([whether printf() supports POSIX/XSI format strings],
17    gt_cv_func_printf_posix,
18    [
19      AC_TRY_RUN([
20#include <stdio.h>
21#include <string.h>
22/* The string "%2$d %1$d", with dollar characters protected from the shell's
23   dollar expansion (possibly an autoconf bug).  */
24static char format[] = { '%', '2', '$', 'd', ' ', '%', '1', '$', 'd', '\0' };
25static char buf[100];
26int main ()
27{
28  sprintf (buf, format, 33, 55);
29  return (strcmp (buf, "55 33") != 0);
30}], gt_cv_func_printf_posix=yes, gt_cv_func_printf_posix=no,
31      [
32        AC_EGREP_CPP(notposix, [
33#if defined __NetBSD__ || defined _MSC_VER || defined __MINGW32__ || defined __CYGWIN__
34  notposix
35#endif
36        ], gt_cv_func_printf_posix="guessing no",
37           gt_cv_func_printf_posix="guessing yes")
38      ])
39    ])
40  case $gt_cv_func_printf_posix in
41    *yes)
42      AC_DEFINE(HAVE_POSIX_PRINTF, 1,
43        [Define if your printf() function supports format strings with positions.])
44      ;;
45  esac
46])
47