[PATCH] New option --print-gc-sections

[Eric Botcazou]

Hi,

We'd like to introduce a --print-gc-sections option, to be used in conjunction 
with --gc-sections, now that its output is accurate thanks to HJ's work.

The warning/error message format recently changed and is now one-lined, so I'm 
proposing the following format:

1. "objfile:location GC function" for .text.function sections.
2. "objfile GC section" for other sections.

For example, on an Ada example with --print-gc-sections --demangle=gnat:

./u.o GC .text
./u.o GC .bss
./u.o:/home/eric/gnat/bugs/F115-010/u.adb:18 GC u.unused
./u.o GC .gcc_except_table.u__unused
./u.o:/home/eric/gnat/bugs/F115-010/u.adb:27 GC u.unused_2
./ma.o GC .text
./ma.o GC .data
./ma.o GC .bss

Tentative patch attached, tested on AMD64/Linux.  Comments?


2006-03-28  Eric Botcazou  <ebotcazou@adacore.com>

bfd/
	* elflink.c (elf_gc_sweep): Invoke the gc_section link callback
	on excluded sections.

include/
	* bfdlink.h (struct bfd_link_info): New flag print_gc_sections.
	(struct bfd_link_callbacks): New method gc_section.

ld/
	* ld.texinfo (Command Line Options): Document --print-gc-sections.
	* ldmain.c (gc_section): New callback.
	(link_callbacks): Add gc_section.
	* lexsup.c (enum option_values): New value OPTION_PRINT_GC_SECTIONS.
	(ld_options): Add --print-gc-sections.
	(parse_args): Handle OPTION_PRINT_GC_SECTIONS.


-- 
Eric Botcazou
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