1# printf-posix.m4 serial 6 (gettext-0.18.2)
2dnl Copyright (C) 2003, 2007, 2009-2013 Free Software Foundation, Inc.
3dnl This file is free software; the Free Software Foundation
4dnl gives unlimited permission to copy and/or distribute it,
5dnl with or without modifications, as long as this notice is preserved.
6
7dnl From Bruno Haible.
8dnl Test whether the printf() function supports POSIX/XSI format strings with
9dnl positions.
10
11AC_DEFUN([gt_PRINTF_POSIX],
12[
13  AC_REQUIRE([AC_PROG_CC])
14  AC_CACHE_CHECK([whether printf() supports POSIX/XSI format strings],
15    gt_cv_func_printf_posix,
16    [
17      AC_RUN_IFELSE(
18        [AC_LANG_SOURCE([[
19#include <stdio.h>
20#include <string.h>
21/* The string "%2$d %1$d", with dollar characters protected from the shell's
22   dollar expansion (possibly an autoconf bug).  */
23static char format[] = { '%', '2', '$', 'd', ' ', '%', '1', '$', 'd', '\0' };
24static char buf[100];
25int main ()
26{
27  sprintf (buf, format, 33, 55);
28  return (strcmp (buf, "55 33") != 0);
29}]])],
30        [gt_cv_func_printf_posix=yes],
31        [gt_cv_func_printf_posix=no],
32        [
33          AC_EGREP_CPP([notposix], [
34#if defined __NetBSD__ || defined __BEOS__ || defined _MSC_VER || defined __MINGW32__ || defined __CYGWIN__
35  notposix
36#endif
37            ],
38            [gt_cv_func_printf_posix="guessing no"],
39            [gt_cv_func_printf_posix="guessing yes"])
40        ])
41    ])
42  case $gt_cv_func_printf_posix in
43    *yes)
44      AC_DEFINE([HAVE_POSIX_PRINTF], [1],
45        [Define if your printf() function supports format strings with positions.])
46      ;;
47  esac
48])
49