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1192.3.28
by Monty Taylor
pandora-build v0.72 - Moved remaining hard-coded tests into pandora-build |
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dnl Copyright (C) 2009 Sun Microsystems |
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dnl This file is free software; Sun Microsystems |
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dnl gives unlimited permission to copy and/or distribute it, |
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dnl with or without modifications, as long as this notice is preserved. |
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#--------------------------------------------------------------------
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# Check what direction the stack runs in
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#--------------------------------------------------------------------
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AC_DEFUN([PANDORA_STACK_DIRECTION],[ |
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1192.3.45
by Monty Taylor
PANDORA_STACK_DIRECTION actually requires AC_FUNC_ALLOCA - so require it. |
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AC_REQUIRE([AC_FUNC_ALLOCA]) |
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1192.3.28
by Monty Taylor
pandora-build v0.72 - Moved remaining hard-coded tests into pandora-build |
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AC_CACHE_CHECK([stack direction], [ac_cv_c_stack_direction],[ |
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AC_RUN_IFELSE([AC_LANG_PROGRAM([[ |
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#include <stdlib.h> |
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int find_stack_direction () |
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{
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static char *addr = 0; |
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auto char dummy; |
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if (addr == 0) |
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{
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addr = &dummy; |
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return find_stack_direction (); |
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}
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else
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return (&dummy > addr) ? 1 : -1; |
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}
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]],[[
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exit (find_stack_direction() < 0); |
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]])],[
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ac_cv_c_stack_direction=1 |
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],[
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ac_cv_c_stack_direction=-1 |
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])
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])
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AC_DEFINE_UNQUOTED(STACK_DIRECTION, $ac_cv_c_stack_direction) |
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])
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