[PATCH][GOLD] Handle no objects in input gracefully.

[=?big5?b?RG91ZyBLd2FuICjD9q62vHcp?= <dougkwan at google dot com>]

Hi,

    This fixes a problem in which gold crash when there are no regular
objects in input.  In stead of crashing, this patch causes an empty
object to be created if there is no error.  This is the same behaviour
of ld.  It also fixes a problem in ARM exidx coverage fix-up.  We need
to recount the local symbols in an object if one of the EXIDX section
is discarded due to ICF of its associated text section.

-Doug

2010-04-14  Doug Kwan  <dougkwan@google.com>

        * arm.cc (Arm_output_section::fix_exidx_coverage): Mark object
        for local symbol recounting if we remove a section due to ICF.
        * gold.cc (queue_middle_gc_tasks): Create a dummy blocker if
        there are no regular objects in input.

Attachment: patch-no-objects.txt
Description: Text document