2 # Determine if the printf() functions have the %a format character.
3 # This is modified from:
4 # http://www.gnu.org/software/ac-archive/htmldoc/ac_cxx_have_ext_slist.html
5 AC_DEFUN([AC_C_PRINTF_A],
7 AC_MSG_CHECKING([for printf %a format specifier])
11 AC_LANG_PROGRAM([#include <stdio.h>
18 sprintf(Buffer, "%a", A);
22 if (A != 0x1.999999999999ap-4)
25 ac_c_printf_a=yes,ac_c_printf_a=no)
27 AC_MSG_RESULT($ac_c_printf_a)
28 if test "$ac_c_printf_a" = "yes"; then
29 AC_DEFINE([HAVE_PRINTF_A],[1],[Define to have the %a format string])