1 # printf-posix.m4 serial 5 (gettext-0.18)
2 dnl Copyright (C) 2003, 2007, 2009 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.
7 dnl From Bruno Haible.
8 dnl Test whether the printf() function supports POSIX/XSI format strings with
9 dnl positions.
11 AC_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_TRY_RUN([
18 #include <stdio.h>
19 #include <string.h>
20 /* The string "%2$d %1$d", with dollar characters protected from the shell's
21 dollar expansion (possibly an autoconf bug). */
22 static char format[] = { '%', '2', '$', 'd', ' ', '%', '1', '$', 'd', '\0' };
23 static char buf[100];
24 int main ()
25 {
26 sprintf (buf, format, 33, 55);
27 return (strcmp (buf, "55 33") != 0);
28 }], gt_cv_func_printf_posix=yes, gt_cv_func_printf_posix=no,
29 [
30 AC_EGREP_CPP([notposix], [
31 #if defined __NetBSD__ || defined __BEOS__ || defined _MSC_VER || defined __MINGW32__ || defined __CYGWIN__
32 notposix
33 #endif
34 ],
35 [gt_cv_func_printf_posix="guessing no"],
36 [gt_cv_func_printf_posix="guessing yes"])
37 ])
38 ])
39 case $gt_cv_func_printf_posix in
40 *yes)
41 AC_DEFINE([HAVE_POSIX_PRINTF], [1],
42 [Define if your printf() function supports format strings with positions.])
43 ;;
44 esac
45 ])