| 1 | # printf-posix.m4 serial 2 (gettext-0.13.1)
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| 2 | dnl Copyright (C) 2003 Free Software Foundation, Inc.
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| 3 | dnl This file is free software; the Free Software Foundation
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| 4 | dnl gives unlimited permission to copy and/or distribute it,
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| 5 | dnl with or without modifications, as long as this notice is preserved.
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| 6 |
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| 7 | dnl From Bruno Haible.
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| 8 | dnl Test whether the printf() function supports POSIX/XSI format strings with
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| 9 | dnl positions.
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| 10 |
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| 11 | AC_DEFUN([gt_PRINTF_POSIX],
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| 12 | [
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| 13 | AC_REQUIRE([AC_PROG_CC])
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| 14 | AC_CACHE_CHECK([whether printf() supports POSIX/XSI format strings],
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| 15 | gt_cv_func_printf_posix,
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| 16 | [
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| 17 | AC_TRY_RUN([
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| 18 | #include <stdio.h>
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| 19 | #include <string.h>
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| 20 | /* The string "%2$d %1$d", with dollar characters protected from the shell's
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| 21 | dollar expansion (possibly an autoconf bug). */
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| 22 | static char format[] = { '%', '2', '$', 'd', ' ', '%', '1', '$', 'd', '\0' };
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| 23 | static char buf[100];
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| 24 | int main ()
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| 25 | {
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| 26 | sprintf (buf, format, 33, 55);
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| 27 | return (strcmp (buf, "55 33") != 0);
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| 28 | }], gt_cv_func_printf_posix=yes, gt_cv_func_printf_posix=no,
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| 29 | [
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| 30 | AC_EGREP_CPP(notposix, [
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| 31 | #if defined __NetBSD__ || defined _MSC_VER || defined __MINGW32__ || defined __CYGWIN__
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| 32 | notposix
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| 33 | #endif
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| 34 | ], gt_cv_func_printf_posix="guessing no",
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| 35 | gt_cv_func_printf_posix="guessing yes")
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| 36 | ])
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| 37 | ])
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| 38 | case $gt_cv_func_printf_posix in
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| 39 | *yes)
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| 40 | AC_DEFINE(HAVE_POSIX_PRINTF, 1,
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| 41 | [Define if your printf() function supports format strings with positions.])
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| 42 | ;;
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| 43 | esac
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| 44 | ])
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