decl.c (FORCE_PREFERRED_STACK_BOUNDARY_IN_MAIN): Define to 0 if undefined.

decl.c (FORCE_PREFERRED_STACK_BOUNDARY_IN_MAIN): Define to 0 if undefined.

2008-06-13  Olivier Hainque  <hainque@adacore.com>

	ada/
	* decl.c (FORCE_PREFERRED_STACK_BOUNDARY_IN_MAIN): Define to 0
	if undefined.
	(gnat_to_gnu_entity) <case E_Function/Procedure>: Request stack
	realignment with force_align_arg_pointer attribute on foreign
	convention subprograms if FORCE_PREFERRED_STACK_BOUNDARY_IN_MAIN.

	testsuite/
	* gnat.dg/task_stack_align.adb: New test.

From-SVN: r136768