# printf-posix.m4 serial 3 (gettext-0.17)

dnl Copyright (C) 2003, 2007 Free Software Foundation, Inc.

dnl This file is free software; the Free Software Foundation

dnl gives unlimited permission to copy and/or distribute it,

dnl with or without modifications, as long as this notice is preserved.

dnl From Bruno Haible.

dnl Test whether the printf() function supports POSIX/XSI format strings with

dnl positions.

AC_DEFUN([gt_PRINTF_POSIX],

[

  AC_REQUIRE([AC_PROG_CC])

  AC_CACHE_CHECK([whether printf() supports POSIX/XSI format strings],

    gt_cv_func_printf_posix,

    [

      AC_TRY_RUN([

#include <stdio.h>

#include <string.h>

/* The string "%2$d %1$d", with dollar characters protected from the shell's

   dollar expansion (possibly an autoconf bug).  */

static char format[] = { '%', '2', '$', 'd', ' ', '%', '1', '$', 'd', '\0' };

static char buf[100];

int main ()

{

  sprintf (buf, format, 33, 55);

  return (strcmp (buf, "55 33") != 0);

}], gt_cv_func_printf_posix=yes, gt_cv_func_printf_posix=no,

      [

        AC_EGREP_CPP(notposix, [

#if defined __NetBSD__ || defined __BEOS__ || defined _MSC_VER || defined __MINGW32__ || defined __CYGWIN__

  notposix

#endif

        ], gt_cv_func_printf_posix="guessing no",

           gt_cv_func_printf_posix="guessing yes")

      ])

    ])

  case $gt_cv_func_printf_posix in

    *yes)

      AC_DEFINE(HAVE_POSIX_PRINTF, 1,

        [Define if your printf() function supports format strings with positions.])

      ;;

  esac

])