# Determine whether printf supports %p for printing pointers. # Copyright (c) 2003 Free Software Foundation, Inc. # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation; either version 2, or (at your option) # any later version. # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # You should have received a copy of the GNU General Public License # along with this program; if not, write to the Free Software # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA # 02111-1307, USA. # CVS_FUNC_PRINTF_PTR # ------------------- # Determine whether printf supports %p for printing pointers. AC_DEFUN([CVS_FUNC_PRINTF_PTR], [AC_CACHE_CHECK(whether printf supports %p, cvs_cv_func_printf_ptr, [AC_TRY_RUN([#include <stdio.h> /* If printf supports %p, exit 0. */ int main () { void *p1, *p2; char buf[256]; p1 = &p1; p2 = &p2; sprintf(buf, "%p", p1); exit(sscanf(buf, "%p", &p2) != 1 || p2 != p1); }], cvs_cv_func_printf_ptr=yes, cvs_cv_func_printf_ptr=no) rm -f core core.* *.core]) if test $cvs_cv_func_printf_ptr = yes; then AC_DEFINE(HAVE_PRINTF_PTR, 1, [Define to 1 if the `printf' function supports the %p format for printing pointers.]) fi ])# CVS_FUNC_PRINTF_PTR