diagnostic-core.h: New.

	* diagnostic-core.h: New.  Contents moved from diagnostic.h and
	toplev.h.
	* diagnostic.c: Don't include toplev.h.
	(progname): Define.  Moved from toplev.c.
	(seen_error): New function.
	* diagnostic.h: Include diagnostic-core.h.
	(diagnostic_t, emit_diagnostic): Don't declare here.
	* toplev.c (progname): Move to toplev.c.
	(emit_debug_global_declarations, compile_file, finalize,
	do_compile, toplev_main): Use seen_error.
	* toplev.h: Include diagnostic-core.h.
	(trim_filename, GCC_DIAG_STYLE, ATTRIBUTE_GCC_DIAG,
	internal_error, warning, warning_at, error, error_n, error_at,
	fatal_error, pedwarn, permerror, sorry, inform, inform_n,
	verbatim, fnotice, progname): Move to diagnostic-core.h.
	* builtins.c: Include diagnostic-core.h instead of diagnostic.h.
	(expand_builtin_expect): Use seen_error.
	* c-decl.c: Include diagnostic-core.h instead of diagnostic.h.
	(c_make_fname_decl, c_write_global_declarations): Use seen_error.
	* c-format.c: Include diagnostic-core.h instead of diagnostic.h.
	* c-gimplify.c: Include diagnostic-core.h instead of diagnostic.h.
	* c-lang.c: Include diagnostic-core.h instead of diagnostic.h.
	* c-lex.c (c_lex_with_flags, interpret_float): Don't increment
	errorcount for errors.
	* c-opts.c (c_common_finish): Use seen_error.
	* cgraph.c: Include diagnostic-core.h instead of diagnostic.h.
	* cgraphunit.c (verify_cgraph_node, verify_cgraph,
	cgraph_output_pending_asms, cgraph_optimize): Use seen_error.
	* coverage.c: Include diagnostic-core.h instead of diagnostic.h.
	(get_coverage_counts): Use seen_error.
	* dwarf2out.c (dwarf2out_finish): Use seen_error.
	* gimplify.c (gimplify_var_or_parm_decl, gimple_push_cleanup,
	gimplify_body): Use seen_error.
	* ipa-inline.c (cgraph_early_inlining): Use seen_error.
	* ipa-pure-const.c (gate_pure_const): Use seen_error.
	* ipa-reference.c (gate_reference): Use seen_error.
	* jump.c: Include diagnostic-core.h instead of diagnostic.h.
	* lambda-code.c: Include diagnostic-core.h instead of
	diagnostic.h.
	* lto-cgraph.c: Include diagnostic-core.h instead of diagnostic.h.
	* lto-compress.c: Include diagnostic-core.h instead of
	diagnostic.h.
	* lto-section-in.c: Include diagnostic-core.h instead of
	diagnostic.h.
	* lto-streamer-out.c: Include diagnostic-core.h instead of
	diagnostic.h.
	* lto-streamer.c: Include diagnostic-core.h instead of
	diagnostic.h.
	(gate_lto_out): Use seen_error.
	* matrix-reorg.c: Include diagnostic-core.h instead of
	diagnostic.h.
	* omega.c: Include diagnostic-core.h instead of diagnostic.h.
	* omp-low.c: Include diagnostic-core.h instead of diagnostic.h.
	(gate_expand_omp, lower_omp_1): Use seen_error.
	* passes.c: Include diagnostic-core.h instead of diagnostic.h.
	(rest_of_decl_compilation, rest_of_type_compilation,
	gate_rest_of_compilation, ipa_write_summaries): Use seen_error.
	* tree-cfg.c (label_to_block_fn): Use seen_error.
	* tree-inline.c (optimize_inline_calls): Use seen_error.
	* tree-mudflap.c (mudflap_finish_file): Use
	seen_error.
	* tree-optimize.c (gate_all_optimizations,
	gate_all_early_local_passes, gate_all_early_optimizations): Use
	seen_error.
	* tree-ssa-structalias.c (gate_ipa_pta): Use seen_error.
	* varpool.c: Include diagnostic-core.h instead of diagnostic.h.
	(varpool_remove_unreferenced_decls,
	varpool_assemble_pending_decls): Use seen_error.
	* Makefile.in (DIAGNOSTIC_CORE_H): Define.
	(TOPLEV_H, DIAGNOSTIC_H): Update.
	(c-decl.o, c-lang.o, c-format.o, lto-compress.o, lto-cgraph.o,
	lto-streamer-out.o, lto-section-in.o, lto-streamer.o,
	c-gimplify.o, omp-low.o, omega.o, diagnostic.o, passes.o,
	builtins.o, jump.o, cgraph.o, varpool.o, matrix-reorg.o,
	coverage.o, lambda-code.o): Update dependencies.

cp:
	* call.c: Include diagnostic-core.h instead of diagnostic.h.
	* cp-lang.c: Don't include diagnostic.h
	* name-lookup.c: Include diagnostic-core.h instead of
	diagnostic.h.
	(cp_emit_debug_info_for_using): Use seen_error.
	* optimize.c: Include diagnostic-core.h instead of diagnostic.h.
	* parser.c: Include diagnostic-core.h instead of diagnostic.h.
	* pt.c (iterative_hash_template_arg): Use seen_error.
	* repo.c: Include diagnostic-core.h instead of diagnostic.h.
	* typeck2.c: Include diagnostic-core.h instead of diagnostic.h.
	* Make-lang.in (cp/cp-lang.o, cp/typeck2.o, cp/call.o, cp/repo.o,
	cp/optimize.o, cp/parser.o, cp/name-lookup.o): Update
	dependencies.

lto:
	* lto.c: Include diagnostic-core.h instead of diagnostic.h.
	(read_cgraph_and_symbols, lto_main): Use seen_error.
	* Make-lang.in (lto/lto.o): Update dependencies.

objc:
	* objc-act.c: Include diagnostic-core.h instead of diagnostic.h.
	* Make-lang.in (objc/objc-act.o): Update dependencies.

From-SVN: r159947