printf-posix.m4 1.5 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445
  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.
  6. dnl From Bruno Haible.
  7. dnl Test whether the printf() function supports POSIX/XSI format strings with
  8. dnl positions.
  9. AC_DEFUN([gt_PRINTF_POSIX],
  10. [
  11. AC_REQUIRE([AC_PROG_CC])
  12. AC_CACHE_CHECK([whether printf() supports POSIX/XSI format strings],
  13. gt_cv_func_printf_posix,
  14. [
  15. AC_TRY_RUN([
  16. #include <stdio.h>
  17. #include <string.h>
  18. /* The string "%2$d %1$d", with dollar characters protected from the shell's
  19. dollar expansion (possibly an autoconf bug). */
  20. static char format[] = { '%', '2', '$', 'd', ' ', '%', '1', '$', 'd', '\0' };
  21. static char buf[100];
  22. int main ()
  23. {
  24. sprintf (buf, format, 33, 55);
  25. return (strcmp (buf, "55 33") != 0);
  26. }], gt_cv_func_printf_posix=yes, gt_cv_func_printf_posix=no,
  27. [
  28. AC_EGREP_CPP([notposix], [
  29. #if defined __NetBSD__ || defined __BEOS__ || defined _MSC_VER || defined __MINGW32__ || defined __CYGWIN__
  30. notposix
  31. #endif
  32. ],
  33. [gt_cv_func_printf_posix="guessing no"],
  34. [gt_cv_func_printf_posix="guessing yes"])
  35. ])
  36. ])
  37. case $gt_cv_func_printf_posix in
  38. *yes)
  39. AC_DEFINE([HAVE_POSIX_PRINTF], [1],
  40. [Define if your printf() function supports format strings with positions.])
  41. ;;
  42. esac
  43. ])