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A TOTP-based authenticator for the GNOME platform, inspired by the Google Authenticator.
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gauthenticator/m4/printf-posix.m4

48 lines
1.5 KiB

# printf-posix.m4 serial 6 (gettext-0.18.2)
dnl Copyright (C) 2003, 2007, 2009-2015 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_RUN_IFELSE(
[AC_LANG_SOURCE([[
#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
])