and rearrange for efficiency. For "PIC code" subtraction, use
"rightseg" rather than recalculating. For "symbol OP symbol"
subtract, set "retval" to absolute_section if symbols in same
section.
* symbols.c (resolve_symbol_value): Resolve "sym +/- expr" to an
O_symbol. Simplify a +/- b code. Allow equality and non-equality
comparisons on symbols from any section. Allow other comparison
operators as for subtraction.
(symbol_equated_reloc_p): New predicate function.
* symbols.h (symbol_equated_reloc_p): Declare.
* write.c (adjust_reloc_syms): Use symbol_equated_reloc_p.
(write_relocs): Likewise.
(write_object_file): Likewise.
(relax_segment <rs_machine_dependent>): Ensure segment for
expression syms is set correctly.
* config/tc-mips.c (md_estimate_size_before_relax): Likewise.
* config/tc-i386.c (md_assemble <Output jumps>): Don't lose part
of a complex expression when setting up frag_var.
(dwarf2_gen_line_info): Kill unused variables.
(dwarf2_finish): Likewise.
(dwarf2_where): Likewise.
(dwarf2_directive_file): If we've only got a string,
hand off to s_app_file.
* ecoff.c: Move the include of ecoff.h.
* symbols.h (S_IS_FUNCTION): Prototype.
* read.c (LEX_HASH): Supply a default.
(lex_type): Use it.
(s_globl): Update `c' after skipping whitespace.
* read.h (LEX_END_NAME, is_name_ender): New.
* expr.c (get_symbol_end): Respect it.
