1 files changed, 43 insertions, 0 deletions
diff --git a/m4/cvs_func_printf_ptr.m4 b/m4/cvs_func_printf_ptr.m4
new file mode 100644
index 0000000..4348e29
--- /dev/null
+++ b/m4/cvs_func_printf_ptr.m4
@@ -0,0 +1,43 @@
+# 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