[Bug driver/44986] -fuse-linker-plugin -save-temps gives resolution file base name of last argument

["rguenth at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44986

Richard Guenther <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
         AssignedTo|unassigned at gcc dot       |rguenth at gcc dot gnu.org
                   |gnu.org                     |

--- Comment #2 from Richard Guenther <rguenth at gcc dot gnu.org> 2010-11-29 15:40:51 UTC ---
The problem is that --end-group is identified as input_basename by the driver
which it does because:

    case OPT_Wl_:
      {
        int prev, j;
        /* Split the argument at commas.  */
        prev = 0;
        for (j = 0; arg[j]; j++)
          if (arg[j] == ',')
            {
              add_infile (save_string (arg + prev, j - prev), "*");
              prev = j + 1;
            }
        /* Record the part after the last comma.  */
        add_infile (arg + prev, "*");

maybe we should just disregard "infiles" with starting '-' here
(same with -Xlinker).  Note that a plain -lfoo will also count
as infile.  -save-temps will simply re-use the last infile it got.

Maybe it's also the unfortunate position of the -fresolution spec
in LINK_COMMAND_SPEC that we run into this.

I have a patch.