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Viewing changes to m4/drizzle_stack_direction.m4

  • Committer: Brian Aker
  • Date: 2009-07-01 02:41:00 UTC
  • mfrom: (1081.1.4 mordred)
  • Revision ID: brian@gaz-20090701024100-nefdy7pnychzpg7h
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m4/drizzle_stack_direction.m4
 
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AC_DEFUN([DRIZZLE_STACK_DIRECTION],
 
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 [AC_CACHE_CHECK(stack direction for C alloca, ac_cv_c_stack_direction,
 
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 [AC_TRY_RUN([#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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 int main ()
 
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 {
 
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   exit (find_stack_direction() < 0);
 
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 }], ac_cv_c_stack_direction=1, ac_cv_c_stack_direction=-1,
 
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   ac_cv_c_stack_direction=)])
 
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 AC_DEFINE_UNQUOTED(STACK_DIRECTION, $ac_cv_c_stack_direction)
 
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])dnl