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patch to make -d[MDNI] and -g3 work in cpplib



This patch fixes the preprocessor debugging switches -d[MDNI] and -g3
to work in cpplib.  It's tested to compile and to work for my purposes
(using -dM to do standards conformance checks on system header
files).  I'm running a full bootstrap and check now.

zw

1999-04-19 18:13 -0400  Zack Weinberg  <zack@rabi.columbia.edu>

	* cpphash.c (dump_definition): New function.
	* cpphash.h: Prototype it.

	* cpplib.c (handle_directive): Don't output anything here.
	Streamline.
	(pass_thru_directive): Take a length, not a pointer to the
	end.  All callers changed.
	(do_define): Handle -dD, -dN, -g3 entirely here.  Streamline.
	(do_include): Handle -dI here.
	(do_ident): Correct to match cccp.
	(do_pragma): Copy the pragma through here.
	(do_assert, do_unassert): Tidy.
	
	* cppinit.c (cpp_finish): If -dM was specified, walk the macro
	hash table and call dump_definition on all the entries.
	* cppmain.c: cpp_finish may produce output.

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`
end


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