Re: Latest acpica

[Matthew Wilcox <matthew-Ztpu424NOJ8@public.gmane.org>]

On Thu, Sep 08, 2005 at 12:23:50PM -0700, Moore, Robert wrote:
> Tell me what needs to change in order to make it compatible.

I've never looked into it in any detail.  From the Debian description:

 The behaviour of Flex has undergone a major change since version
 2.5.4a; Flex scanners are now reenterant, you may have multiple
 scanners in the same program with differing sets of defaults, and
 they play nicer with modern C and C++ compilers. The Flip side is
 that Flex no longer conforms to the POSIX lex behaviour, and the
 scanners require conforming implementations when flex is used in ANSI
 C mode. The package flex-old provides the older behaviour.

The GNU web page has some more detail:

http://www.gnu.org/software/flex/manual/html_chapter/flex_20.html#SEC20

and there's a bug showing exactly this problem being encountered here:

http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=191942

The important bit is probably the quote:

	The relevant change in the new flex is that it's no longer valid
	to call unput() from the section after %%, only in actions or
	in the %{ ... %} section.

HTH.


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