1 # printf-posix.m4 serial 2 (gettext-0.13.1) 2 dnl Copyright (C) 2003 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. 6 7 dnl From Bruno Haible. 8 dnl Test whether the printf() function supports POSIX/XSI format strings with 9 dnl positions. 10 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 _MSC_VER || defined __MINGW32__ || defined __CYGWIN__ 32 notposix 33 #endif 34 ], gt_cv_func_printf_posix="guessing no", 35 gt_cv_func_printf_posix="guessing yes") 36 ]) 37 ]) 38 case $gt_cv_func_printf_posix in 39 *yes) 40 AC_DEFINE(HAVE_POSIX_PRINTF, 1, 41 [Define if your printf() function supports format strings with positions.]) 42 ;; 43 esac 44 ]) 45
