coff weak symbol patches

["Mark E." <snowball3@usa.net>]

Hi Ian,
Attached are the diffs for coff weak symbols. One problem area to 
note is weak undefined symbols probably don't work properly.

I've sent off the form you sent and the e-mail too.

Here's the changelog I came up with:

Include Changes:
* internal.h: Defined C_WEAKEXT.
* pe.h: Redefined C_WEAKEXT to C_NT_WEAK if 
COFF_WITH_PE defined.

BFD changes:
* obj-coff.c: Added obj_coff_weak to handle the ".weak" directive.
* coffcode.h
    (coff_slurp_symbol_table): Add case for C_WEAKEXT to handle 
weak symbols. Set BSF_WEAK for weak symbols.
* coffgen.c (coff_write_symbol): Make sure symbol has 
C_WEAKEXT storage class when BSF_WEAK is set.
    (coff_write_alien_symbol): Same
    (coff_print_symbol): Show if symbol is weak when printing all 
symbol information.
* cofflink.c
    (coff_link_check_ar_symbols): Include C_WEAKEXT type 
symbols in check.
    (coff_link_add_symbols): Same. Also make sure symbol 
remains weak when undefined.
    (_bfd_coff_link_input_bfd): Add C_WEAKEXT to skip test.

AS change:
* config/tc-i386.h: Added definition of LOCAL_LABEL for when 
TE_GO32 defined


-- 
Mark E. snowball3@usa.net
http://members.xoom.com/snowball3/