[Bug default/24328] New: [dwz] Combining files with different pointer sizes switches off multifile mode

["vries at gcc dot gnu.org" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=24328

            Bug ID: 24328
           Summary: [dwz] Combining files with different pointer sizes
                    switches off multifile mode
           Product: dwz
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: default
          Assignee: nobody at sourceware dot org
          Reporter: vries at gcc dot gnu.org
                CC: dwz at sourceware dot org
  Target Milestone: ---

Consider 64-bit and 32-bit hello world executables:
...
$ gcc hello.c -g -m64 -o 1; cp 1 2
$ gcc hello.c -g -m32 -o 3; cp 3 4
...

When running dwz in multifile mode, we get:
...
$ dwz -m 5 1 2 3 4
dwz: Multi-file optimization not allowed for differentpointer sizes or
endianity
$ echo $?
0
...

It seems multifile mode is switched off completely:
...
$ readelf -S 1 2 3 4 | grep -c "\.gnu_debugaltlink"
0
...

It could at least support one pointer size.

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