printf-posix.m4 (1579B)
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. 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_RUN_IFELSE( 18 [AC_LANG_SOURCE([[ 19 #include <stdio.h> 20 #include <string.h> 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' }; 24 static char buf[100]; 25 int main () 26 { 27 sprintf (buf, format, 33, 55); 28 return (strcmp (buf, "55 33") != 0); 29 }]])], 30 [gt_cv_func_printf_posix=yes], 31 [gt_cv_func_printf_posix=no], 32 [ 33 AC_EGREP_CPP([notposix], [ 34 #if defined __NetBSD__ || defined __BEOS__ || defined _MSC_VER || defined __MINGW32__ || defined __CYGWIN__ 35 notposix 36 #endif 37 ], 38 [gt_cv_func_printf_posix="guessing no"], 39 [gt_cv_func_printf_posix="guessing yes"]) 40 ]) 41 ]) 42 case $gt_cv_func_printf_posix in 43 *yes) 44 AC_DEFINE([HAVE_POSIX_PRINTF], [1], 45 [Define if your printf() function supports format strings with positions.]) 46 ;; 47 esac 48 ])