1 # printf-posix.m4 serial 6 (gettext-0.18.2)
2 dnl Copyright (C) 2003, 2007, 2009-2016 Free Software Foundation, Inc.
3 dnl This file is free software; the Free Software Foundation
4 dnl gives unlimited permission to copy and/or distribute it,
5 dnl with or without modifications, as long as this notice is preserved.
8 dnl Test whether the printf() function supports POSIX/XSI format strings with
11 AC_DEFUN([gt_PRINTF_POSIX],
13 AC_REQUIRE([AC_PROG_CC])
14 AC_CACHE_CHECK([whether printf() supports POSIX/XSI format strings],
15 gt_cv_func_printf_posix,
21 /* The string "%2$d %1$d", with dollar characters protected from the shell's
22 dollar expansion (possibly an autoconf bug). */
23 static char format[] = { '%', '2', '$', 'd', ' ', '%', '1', '$', 'd', '\0' };
27 sprintf (buf, format, 33, 55);
28 return (strcmp (buf, "55 33") != 0);
30 [gt_cv_func_printf_posix=yes],
31 [gt_cv_func_printf_posix=no],
33 AC_EGREP_CPP([notposix], [
34 #if defined __NetBSD__ || defined __BEOS__ || defined _MSC_VER || defined __MINGW32__ || defined __CYGWIN__
38 [gt_cv_func_printf_posix="guessing no"],
39 [gt_cv_func_printf_posix="guessing yes"])
42 case $gt_cv_func_printf_posix in
44 AC_DEFINE([HAVE_POSIX_PRINTF], [1],
45 [Define if your printf() function supports format strings with positions.])