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