2006-12-19 Frank Ch. Eigler <fche@redhat.com>

2006-12-19  Frank Ch. Eigler  <fche@redhat.com>

	PR 3522.
	* tapsets.cxx (dwflpp::emit_address): Call
	_stp_module_relocate only once per session.

	Error message cleanup: duplicate elimination etc.
	* session.h (saved_errors): Store a set of 'em.
	(num_errors): Return set size.  Remove old numeric field.
	Update all callers.
	* elaborate.cxx (systemtap_session::print_errors):
	Print each encountered message just once.
	* staptree (semantic_error): Make msg2 writeable.
	Add a chain field.
	* tapsets.cxx (*var_expanding*:visit_target_symbol): Set saved
	semantic_error's chain field.
	* elaborate.cxx (register_library_aliases, visit_foreach_loop,
	visit_functioncall, derive_probes): Plop "while: ..." error
	message	prefix/suffix right into the semantic_error message string.
	* parse.cxx (lexer::scan): Identify erroneous token better
	in error message for unresolvable $N/@M command line args.
	* util.h (lex_cast_hex): Use std::hex, not std::ios::hex.

2006-12-19  Frank Ch. Eigler  <fche@redhat.com>

	PR 3522.
	* buildok/twentyfive.stp: New test for static $var access.