* Makefile.in (optabs.o): Depend on real.h
(resource.o): Depend on insn-attr.h
* builtins.c (result_vector): Wrap prototype in macro conditions
governing definition and use.
* c-common.c: Include tm_p.h.
* c-lex.c: Likewise.
* elfos.h: Constify a char*.
* final.c (align_fuzz): Wrap prototype in macro HAVE_ATTR_length.
(get_attr_length, shorten_branches, profile_after_prologue): Mark
parameter with ATTRIBUTE_UNUSED.
* fold-const.c (exact_real_inverse): Wrap variable `i' in
CHECK_FLOAT_VALUE.
* haifa-sched.c (schedule_insns): Mark parameter with
ATTRIBUTE_UNUSED.
* optabs.c: Include real.h.
* real.h (ereal_atof): Add prototype arguments.
* resource.c: Include insn-attr.h.
* sdbout.c (sdbout_queue_anonymous_type,
sdbout_dequeue_anonymous_types): Wrap in macro
SDB_ALLOW_FORWARD_REFERENCES.
(sdbout_init, sdbout_start_new_source_file): Mark parameter with
ATTRIBUTE_UNUSED.
* stmt.c (expand_return): Wrap variable `op0' in macro HAVE_return.
* stupid.c: Include tm_p.h.
* tree.c (real_value_from_int_cst): Mark parameter with
ATTRIBUTE_UNUSED.