https://sourceware.org/bugzilla/show_bug.cgi?id=19446
--- Comment #4 from David Li <xinliangli at gmail dot com> ---
(In reply to H.J. Lu from comment #3)
> (In reply to David Li from comment #2)
> > (In reply to H.J. Lu from comment #1)
> > > Since UNREF section is not referenced, it should be GCed. Am I missing
> > > something?
> >
> > Note that the section does not have 'a' bit -- just like debug sections.
> > Linker won't GC debug sections, right?
>
> ld only treats known debug sections as debug sections. Are you looking
> for a way to prevent unreferenced section from GC?
yes.
>
> > Also there is inconsistent behavior here -- when g0 is not referenced by
> > UNREF, UNREF will be kept by the linker.
>
> g0 is removed by ld in binutils 2.26.
No -- that is not the point. The point is that if UNDEF section is defined as
follows, ld *will* keep UNREF (I have not tried 2.26). What makes ld think
UNREF should be kept here as they are not known debug sections?
.globl unref
.section UNREF,"",@progbits
.align 8
.type unref, @object
.size unref, 8
unref:
.long 0
.text
.globl main
.type main, @function
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