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Robin Barker
January 5, 2005 03:55
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This patch improves the behaviour of building perl under -DCHECK_FORMAT
to produce a properly functioning executable (passes all tests).

It does this by replacing the formats
	%_		by %-p
	%.256_	by %-256p
	%vd		by %-1p

There are then hacks in sv.c to trap these special cases
and "do the right thing".

All the extra code is surrounded by ifdef CHECK_FORMAT, so
there is no impact on the real code.

	make all test	- OK

	make all OPTIMIZE=-DCHECK_FORMAT\ -Wformat
				- finds format errors, as before
	make test OPTIMIZE=-DCHECK_FORMAT\ -Wformat
				- OK


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