On 09 Oct 16:07, Ilya Verbin wrote:
> > > + /* By default linker does not discard .gnu.offload_lto_* sections.
> > > */
> > > + const char *linker_script = make_temp_file ("_linker_script.x");
> > > + FILE *stream = fopen (linker_script, "w");
> > > + if (!stream)
> > > + fatal_error ("fopen %s: %m", linker_script);
> > > + fprintf (stream, "SECTIONS { /DISCARD/ : { *("
> > > + OFFLOAD_SECTION_NAME_PREFIX "*) } }\n");
> > > + fclose (stream);
> > > + printf ("%s\n", linker_script);
> > > +
> > > + goto finish;
> > > + }
> >
> > Does this work with gold? Are there any other linkers that support plugins,
> > but don't support linker scripts this way?
>
> Oops, gold does not support scripts, outputted from plugins :(
> "error: SECTIONS seen after other input files; try -T/--script"
>
> Probably, we should update default linker scripts in binutils?
> But without latest ld/gold all binaries compiled without -flto and with
> offloading will contain intermediate bytecode...
Actually, this issue is not due to outputting a script from a plugin,
gold just does not support partial linker scripts:
https://sourceware.org/bugzilla/show_bug.cgi?id=17451
So it seems that discarding .gnu.offload_lto_* sections (like it is done for
.gnu.lto_*) in the default ld and gold scripts is the right way?
Thanks,
-- Ilya
